Fix inaccuracies in the documentation

- version history: json_base_class_t (3.11.3), JSON_HAS_CPP_11 (3.10.0),
  JSON_HAS_RANGES exclusions, define-type macros, ABI tags
- releases: 3.12.0 raised the minimum CMake version
- from_*: the (ptr, len) overloads are deleted, not removed, in 4.0.0
- contains/count/find: document the deleted integral overloads
- add JSON_HAS_RANGE_VIEW_CONVERSION and list the JSON_HAS_* macros in
  the macro overview
- mention BON8 and error_handler where binary formats are listed
- broken links, outdated URLs, warning count, Hunter v0.26.12
- copy_markdown_source hook: expand snippets in the Markdown copies

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

.gitattributes

@@ -0,0 +1,3 @@
+# generated files are collapsed in diffs and excluded from language statistics
+single_include/** linguist-generated
+nlohmann_json.natvis linguist-generated

.github/CODEOWNERS

@@ -1,5 +1,5 @@
 # JSON for Modern C++ was originally written by Niels Lohmann.
-# Since 2013, over 250 contributors have helped to improve the library.
+# Since 2013, over 400 contributors have helped to improve the library.
 # This CODEOWNERS file is only to make sure that @nlohmann is requested
 # for a code review in case of a pull request.
 

.github/CONTRIBUTING.md

@@ -98,7 +98,7 @@ $ ctest --test-dir build -j 10
 The test suite should report:
 
 ```
-100% tests passed, 0 tests failed out of 98
+100% tests passed, 0 tests failed out of <number of tests>
 ```
 
 #### Add tests
@@ -149,14 +149,17 @@ make build -C docs/mkdocs          # strict build: fails on broken links, anchor
 make check_mermaid -C docs/mkdocs  # checks the Mermaid diagrams (requires Node.js)
 ```
 
-A new API page also needs an entry in [`docs/docset/docSet.sql`](https://github.com/nlohmann/json/blob/develop/docs/docset/docSet.sql),
-the search index of the docset; `make build` reports missing entries.
+The search index of the docset is generated from [`mkdocs.yml`](https://github.com/nlohmann/json/blob/develop/docs/mkdocs/mkdocs.yml)
+and each page's title (H1) and declaration by
+[`docs/docset/generate_docset.py`](https://github.com/nlohmann/json/blob/develop/docs/docset/generate_docset.py);
+`make build` reports API pages that cannot be classified.
 
 ### Amalgamate the source code
 
 The single-header files
-[`single_include/nlohmann/json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp) and
-[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp)
+[`single_include/nlohmann/json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp),
+[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp), and
+[`single_include/nlohmann/json_literals.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_literals.hpp)
 are **generated** from the source files in the
 [`include/nlohmann` directory](https://github.com/nlohmann/json/tree/develop/include/nlohmann). **Do not** edit the
 files directly; instead, modify the include/nlohmann sources and regenerate the files by executing:
@@ -179,7 +182,7 @@ The amalgamation check in CI fails if any of these generated files is out of dat
 
 ## Recommended documentation
 
-- The library’s [README file](https://github.com/nlohmann/json/blob/master/README.md) is an excellent starting point to
+- The library’s [README file](https://github.com/nlohmann/json/blob/develop/README.md) is an excellent starting point to
   understand its functionality.
 - The [documentation page](https://json.nlohmann.me) is the reference documentation of the library.
 - [RFC 8259](https://datatracker.ietf.org/doc/html/rfc8259) is the reference for the JavaScript Object Notation (JSON)
@@ -218,9 +221,9 @@ feature macros then allows users to test their code against the library in the n
 ### Break C++11 language conformance
 
 This library is designed to work with C++11 and later. This means that any
-[supported C++11 compiler](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers) should compile
+[supported C++11 compiler](https://github.com/nlohmann/json/blob/develop/README.md#supported-compilers) should compile
 the library without problems. Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual
-Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support.
+C++ 2013 and earlier are known not to work due to missing or incomplete C++11 support.
 
 Please do not add features that do not work with the mentioned supported compilers. Please guard features from C++14 and
 later against the respective [`JSON_HAS_CPP_14`](https://json.nlohmann.me/api/macros/json_has_cpp_11/) macros.
@@ -236,12 +239,11 @@ extension.
 The following areas really need contribution and are always welcomed:
 
 - Extending the **continuous integration** toward more exotic compilers such as Android NDK, Intel's Compiler, or the
-  bleeding-edge versions Clang.
-- Improving the efficiency of the **JSON parser**. The current parser is implemented as a naive recursive descent parser
-  with hand-coded string handling. More sophisticated approaches like LALR parsers would be really appreciated. That
-  said, parser generators like Bison or ANTLR do not play nice with single-header files -- I really would like to keep
-  the parser inside the `json.hpp` header, and I am not aware of approaches similar to [`re2c`](http://re2c.org) for
-  parsing.
+  bleeding-edge versions of Clang.
+- Improving the efficiency of the **JSON parser**. The current parser is a hand-written iterative parser that keeps an
+  explicit stack instead of recursing, with hand-coded string handling. Speeding up the lexer or the value construction
+  would be appreciated. Parser generators like Bison or ANTLR do not play nice with single-header files -- I really
+  would like to keep the parser inside the `json.hpp` header.
 - Extending and updating existing **benchmarks** to include (the most recent version of) this library. Though efficiency
   is not everything, speed and memory consumption are very important characteristics for C++ developers, so having
   proper comparisons would be interesting.

.github/ISSUE_TEMPLATE/bug.yaml

@@ -52,7 +52,7 @@ body:
         If possible, provide a small and self-contained example that triggers
         the bug. Please understand that we cannot analyze and debug large code
         bases. Please do not paste screenshots here.
-      render: Shell
+      render: cpp
   - type: textarea
     id: output
     attributes:
@@ -79,7 +79,7 @@ body:
       description: >
         Which version of the library did you use? If it is a released version,
         please enter the version number (e.g., 3.12.0). Otherwise, please enter
-        the commit hash. If you got the library from another source as the
+        the commit hash. If you got the library from another source than the
         GitHub repository (e.g., via a package manager), please also state
         this.
     validations:

.github/labeler.yml

@@ -21,6 +21,17 @@ labels:
   files:
     - "cmake/.*"
 
+# other build systems
+- label: "CMake"
+  files:
+    - "(meson\\.build|meson_options\\.txt|BUILD\\.bazel|MODULE\\.bazel|Package\\.swift)"
+
+- label: "documentation"
+  files:
+    - ".github/ISSUE_TEMPLATE/.*"
+    - ".github/config\\.yml"
+    - ".github/(CONTRIBUTING|SECURITY|CODE_OF_CONDUCT|PULL_REQUEST_TEMPLATE)\\.md"
+
 - label: "CI"
   files:
     - ".github/workflows/.*"

.github/workflows/check_amalgamation.yml

@@ -83,8 +83,7 @@ jobs:
           # byte for byte), so there is nothing to gain from checking out a
           # separate copy, and doing so would make this step fail on a PR
           # that adds support for a new dispatch table until that PR itself
-          # merges to develop, the same way generate_natvis.py's --version
-          # requirement briefly did.
+          # merges to develop.
           TMPDIR=$(mktemp -d ./macro_builder_check.XXXXXX)
           c++ -std=c++11 tools/macro_builder/main.cpp -o "$TMPDIR/macro_builder"
           "$TMPDIR/macro_builder" > "$TMPDIR/paste.hpp"
@@ -117,7 +116,6 @@ jobs:
 
           python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json.json -s .
           python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json_fwd.json -s .
-          cp include/nlohmann/json_literals.hpp $INCLUDE_DIR/json_literals.hpp
 
           # the header list of the Bazel "json" target must match the files in include/
           cmake -P cmake/scripts/gen_bazel_build_file.cmake
@@ -138,17 +136,13 @@ jobs:
           ${{ github.workspace }}/venv/bin/astyle --project=tools/astyle/.astylerc --suffix=none --quiet \
             $(find $SOURCE_DIRS -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' -not -path 'tests/abi/include/nlohmann/*' | sort)
 
+          # json_literals.hpp is copied verbatim from the (now formatted) include/
+          # directory, like `make amalgamate` does
+          cp include/nlohmann/json_literals.hpp $INCLUDE_DIR/json_literals.hpp
+
       - name: Regenerate nlohmann_json.natvis
         run: |
           cd $MAIN_DIR
-          # Pass --version explicitly so this step also works with the tool
-          # copy from develop before this repository's own generate_natvis.py
-          # learns to derive the version itself: the older script requires
-          # --version, and the newer one accepts it as an explicit override.
-          ABI_MACROS=include/nlohmann/detail/abi_macros.hpp
-          VERSION_MAJOR=$(grep -m1 'define NLOHMANN_JSON_VERSION_MAJOR' $ABI_MACROS | grep -o '[0-9]\+')
-          VERSION_MINOR=$(grep -m1 'define NLOHMANN_JSON_VERSION_MINOR' $ABI_MACROS | grep -o '[0-9]\+')
-          VERSION_PATCH=$(grep -m1 'define NLOHMANN_JSON_VERSION_PATCH' $ABI_MACROS | grep -o '[0-9]\+')
           # The template is what this check verifies the committed natvis
           # file against, so take it from this PR rather than from the
           # develop checkout: generate_natvis.py loads the template from its
@@ -156,7 +150,7 @@ jobs:
           # template could never pass. Like the macro_builder step above,
           # this only renders PR content in a job without credentials.
           cp tools/generate_natvis/nlohmann_json.natvis.j2 $NATVIS_TOOL_DIR/
-          python3 $NATVIS_TOOL_DIR/generate_natvis.py --version "$VERSION_MAJOR.$VERSION_MINOR.$VERSION_PATCH" $MAIN_DIR
+          python3 $NATVIS_TOOL_DIR/generate_natvis.py $MAIN_DIR
 
       - name: Build patch and check for differences
         id: diff
@@ -165,7 +159,7 @@ jobs:
           mkdir -p ${{ github.workspace }}/patch
           git diff --patch --no-color > ${{ github.workspace }}/patch/amalgamation.patch
           if [ -s ${{ github.workspace }}/patch/amalgamation.patch ]; then
-            echo "The source code has not been amalgamated/formatted correctly or BUILD.bazel is out of date. Diff:"
+            echo "The source code has not been amalgamated/formatted correctly, or BUILD.bazel, nlohmann_json.natvis, or the macro_builder tables in macro_scope.hpp are out of date ('make amalgamate BUILD.bazel natvis' fixes all but the tables, see tools/macro_builder/README.md). Diff:"
             cat ${{ github.workspace }}/patch/amalgamation.patch
             echo "has_diff=true" >> "$GITHUB_OUTPUT"
           else

.github/workflows/comment_check_amalgamation.yml

@@ -96,7 +96,7 @@ jobs:
               issue_number: issue_number,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated and/or formatted correctly, or `BUILD.bazel` is out of date.'
+              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated and/or formatted correctly, or `BUILD.bazel`, `nlohmann_json.natvis`, or the macro_builder tables in `macro_scope.hpp` are out of date. `make amalgamate BUILD.bazel natvis` fixes all but the tables (see `tools/macro_builder/README.md`).'
                     + (hasPatch ? '\n\n📎 A ready-to-apply patch is attached to the [failed workflow run](' + runUrl + ') as the `amalgamation-patch` artifact.'
                                   + ' Download it, then apply it locally from the repository root with:'
                                   + '\n\n```shell\ngit apply amalgamation.patch\n```\n\n'

.github/workflows/publish_documentation.yml

@@ -15,6 +15,7 @@ on:
       - .github/SECURITY.md
       - cmake/clang_flags.cmake
       - cmake/gcc_flags.cmake
+      - include/nlohmann/detail/abi_macros.hpp
       - tests/fmt_formatter/project/main.cpp
       - tools/astyle/.astylerc
   workflow_dispatch:

.github/workflows/ubuntu.yml

@@ -109,7 +109,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        target: [ci_test_amalgamation, ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
+        target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@e14015d583714f6e62063499dc959a02595150a1 # v2.21.1
@@ -117,6 +117,7 @@ jobs:
           egress-policy: audit
 
       - name: Install Valgrind
+        if: matrix.target == 'ci_test_valgrind'
         run: sudo apt-get update ; sudo apt-get install -y valgrind
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -279,7 +280,7 @@ jobs:
           persist-credentials: false
       - name: Get latest CMake and ninja
         uses: lukka/get-cmake@fffaaafeea488556c2c12dad60690008bc1caacb # v4.4.2
-      - name: Set env FORCE_STDCPPFS_FLAG for clang 7 / 8 / 9 / 10
+      - name: Disable filesystem support (std::filesystem is unusable) for clang 7 / 8 / 9 / 10
         run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
         if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
       - name: Run CMake

.github/workflows/windows.yml

@@ -166,6 +166,13 @@ jobs:
       # link, but the binaries clang 11.0.1 and clang 18.1.8 then produce crash
       # before doctest prints its first line - 39 of 102 tests on clang 18.
       # Keep the objects small by splitting the test files instead.
+      # Objects with more than 65535 sections fail to link with "relocation
+      # truncated to fit: IMAGE_REL_AMD64_REL32 against `.rdata'": the MinGW
+      # linker stores the section an associative COMDAT section belongs to in
+      # 16 bits (x_associated in binutils' include/coff/internal.h), so it
+      # discards the jump tables of inline functions together with the wrong
+      # function. Each basic_json specialization a test file instantiates adds
+      # many sections, so test a second one in a file of its own.
       - name: Run CMake
         run: cmake -S . -B build ^
              -DCMAKE_CXX_COMPILER="C:/Program Files/LLVM/bin/clang++.exe" ^
@@ -180,7 +187,7 @@ jobs:
       - name: Test
         run: cd build ; ctest -j 10 -C Debug --output-on-failure
 
-  clang-cl-12:
+  clang-cl:
     runs-on: windows-2022
     strategy:
       matrix:

.gitignore

@@ -27,7 +27,6 @@
 /docs/docset/JSON_for_Modern_C++.tgz
 /docs/docset/docSet.dsidx
 /docs/mkdocs/.cache/
-/docs/mkdocs/docs/__pycache__/
 /docs/mkdocs/hooks/__pycache__/
 /docs/mkdocs/scripts/mermaid/node_modules/
 /docs/mkdocs/site/
@@ -47,3 +46,17 @@ nlohmann_json.spdx
 
 # Bazel-related
 MODULE.bazel.lock
+
+# backups left by `make check-amalgamation` or the ci_test_amalgamation target if they are interrupted
+/BUILD.bazel~
+/nlohmann_json.natvis~
+/single_include/nlohmann/*.hpp~
+/venv_astyle/
+
+# release outputs of `make release`
+/include.zip
+/include.zip.asc
+/json.tar.xz
+/json.tar.xz.asc
+/release_files/
+/single_include/nlohmann/*.asc

BUILD.bazel

@@ -81,6 +81,7 @@ cc_library(
     hdrs = [
         "single_include/nlohmann/json.hpp",
         "single_include/nlohmann/json_fwd.hpp",
+        "single_include/nlohmann/json_literals.hpp",
     ],
     includes = ["single_include"],
     visibility = ["//visibility:public"],

CITATION.cff

@@ -8,7 +8,7 @@ authors:
     website: https://nlohmann.me
 title: "JSON for Modern C++"
 version: 3.12.0
-date-released: 2025-04-07
+date-released: 2025-04-11
 license: MIT
 repository-code: "https://github.com/nlohmann/json"
 url: https://json.nlohmann.me

CMakeLists.txt

@@ -30,7 +30,7 @@ endif ()
 option(NLOHMANN_JSON_BUILD_MODULES "Build C++ modules support" OFF)
 
 if(NLOHMANN_JSON_BUILD_MODULES)
-    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+    if(NOT CMAKE_VERSION VERSION_LESS 3.28)
         message(STATUS "Building nlohmann.json C++ module")
         add_subdirectory(src/modules)
     else()

FILES.md

@@ -14,7 +14,7 @@ This file describes the source for supporting files; that is, files that are not
 The [GitHub Actions](https://docs.github.com/en/actions) workflows that build, test, and analyze the library. Each file in this folder defines one workflow:
 
 - `ubuntu.yml`, `macos.yml`, `windows.yml` — build and run the test suite on Linux, macOS, and Windows.
-- `check_amalgamation.yml` — verify that the single-header amalgamation in `single_include` is up to date on pull requests.
+- `check_amalgamation.yml` — verify on pull requests and pushes to `develop` that the generated files (the single-header amalgamation in `single_include`, `BUILD.bazel`, and `nlohmann_json.natvis`) are up to date.
 - `comment_check_amalgamation.yml` — comment on a pull request when the amalgamation check failed.
 - `cifuzz.yml` — run short fuzzing sessions via [OSS-Fuzz CIFuzz](https://google.github.io/oss-fuzz/getting-started/continuous-integration/) on pull requests.
 - `codeql-analysis.yml` — run [CodeQL](https://codeql.github.com) code scanning.
@@ -24,7 +24,9 @@ The [GitHub Actions](https://docs.github.com/en/actions) workflows that build, t
 - `dependency-review.yml` — scan dependency changes in pull requests for known vulnerabilities.
 - `labeler.yml` — the "Pull Request Labeler" workflow (see `.github/labeler.yml`).
 - `stale.yml` — comment on and close stale issues and pull requests.
-- `publish_documentation.yml` — build and publish the documentation on every merge to the `develop` branch.
+- `publish_documentation.yml` — build and publish the documentation on pushes to the `develop` branch that touch the documentation sources (or the files it embeds).
+- `check_docs_links.yml` — check the links of the documentation weekly, as external links can break without any change in this repository.
+- `cancel_closed_pr_runs.yml` — cancel unfinished workflow runs of a pull request once it is closed or merged.
 
 Further documentation:
 
@@ -266,8 +268,9 @@ meson setup builddir
 ninja -C builddir
 ```
 
-`meson_options.txt` defines the options, which mirror the CMake options that change the library's target (for example,
-`-DDiagnostics=true`). Meson requires this file next to `meson.build`, so it is also part of `include.zip`. `make check_build_options`
+`meson_options.txt` defines the options, which mirror the names of the CMake options that change the library's target (for example,
+`-DDiagnostics=true`); their defaults may differ (for example, `MultipleHeaders` defaults to `false` in Meson, while
+`JSON_MultipleHeaders` is `ON` in CMake). Meson requires this file next to `meson.build`, so it is also part of `include.zip`. `make check_build_options`
 ([`tools/check_build_options`](tools/check_build_options/README.md)) checks in CI that both files and the pkg-config files
 stay in sync with the CMake options.
 

MODULE.bazel

@@ -1,5 +1,6 @@
 module(
     name = "nlohmann_json",
+    version = "3.12.0",
     compatibility_level = 1,
 )
 

Makefile

@@ -1,4 +1,4 @@
-.PHONY: pretty clean ChangeLog.md release update_hedley update_hedley_undef BUILD.bazel natvis macro_builder_check check_build_options
+.PHONY: all amalgamate check-amalgamation check_build_options pretty install_astyle clean ChangeLog.md release update_hedley update_hedley_undef BUILD.bazel natvis macro_builder_check run_benchmarks pvs_studio serve_header reuse spdx
 
 ##########################################################################
 # configuration
@@ -41,12 +41,18 @@ all:
 	@echo "BUILD.bazel - regenerate the Bazel BUILD file from the include/nlohmann sources"
 	@echo "ChangeLog.md - generate ChangeLog file"
 	@echo "check-amalgamation - check whether sources have been amalgamated and BUILD.bazel is up to date"
+	@echo "check_build_options - check that the Meson build and the pkg-config files offer the options of the CMake target"
 	@echo "clean - remove built files"
-	@echo "fuzzing - see tests/fuzzing.md for how to build and run the fuzzers"
+	@echo "(fuzzers) - see tests/fuzzing.md, or run 'make -C tests fuzzers' to build the AFL fuzzers"
 	@echo "macro_builder_check - check that macro_scope.hpp matches tools/macro_builder's output"
 	@echo "natvis - regenerate nlohmann_json.natvis from the current ABI tags and version"
 	@echo "pretty - beautify code with Artistic Style"
+	@echo "pvs_studio - run the PVS-Studio static analyzer and open the report"
+	@echo "release - create the release files (include.zip, json.tar.xz, single headers, signatures, hashes)"
+	@echo "reuse - annotate the source files with REUSE license headers and lint them"
 	@echo "run_benchmarks - build and run benchmarks"
+	@echo "serve_header - serve the single header, re-amalgamated on demand (see tools/serve_header)"
+	@echo "spdx - generate the SPDX software bill of materials nlohmann_json.spdx"
 	@echo "update_hedley - download Hedley and regenerate hedley.hpp / hedley_undef.hpp"
 	@echo "update_hedley_undef - rebuild hedley_undef.hpp from the JSON_HEDLEY_* #define names in hedley.hpp"
 
@@ -108,13 +114,18 @@ $(AMALGAMATED_FWD_FILE): $(SRCS)
 $(AMALGAMATED_LITERALS_FILE): include/nlohmann/json_literals.hpp
 	cp include/nlohmann/json_literals.hpp $(AMALGAMATED_LITERALS_FILE)
 
+NATVIS_VENV=tools/generate_natvis/venv
+
 # regenerate nlohmann_json.natvis from the ABI tags and version in include/nlohmann/detail/abi_macros.hpp
+# (the dependencies are installed into a virtual environment first)
 natvis:
-	python3 tools/generate_natvis/generate_natvis.py .
+	@test -d $(NATVIS_VENV) || python3 -mvenv $(NATVIS_VENV)
+	@$(NATVIS_VENV)/bin/python3 -c 'import jinja2' 2>/dev/null || $(NATVIS_VENV)/bin/pip3 install --quiet -r tools/generate_natvis/requirements.txt
+	$(NATVIS_VENV)/bin/python3 tools/generate_natvis/generate_natvis.py .
 
 # regenerate the two tools/macro_builder blocks of $(MACRO_SCOPE_HPP) (see its README.md) and diff against the
 # checked-in header; phony, because it never writes $(MACRO_SCOPE_HPP) itself
-macro_builder_check:
+macro_builder_check: install_astyle
 	@set -e; \
 	TMPDIR=$$(mktemp -d ./macro_builder_check.XXXXXX); \
 	trap 'rm -rf "$$TMPDIR"' EXIT; \
@@ -131,27 +142,27 @@ macro_builder_check:
 check_build_options:
 	python3 tools/check_build_options/check_build_options.py .
 
-# check if file single_include/nlohmann/json.hpp has been amalgamated from the nlohmann sources
+# check if the single headers have been amalgamated from the nlohmann sources and if BUILD.bazel and
+# nlohmann_json.natvis are up to date; all checks are run, and the checked-in files are always restored
 check-amalgamation:
-	@mv $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~
-	@mv $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~
-	@mv $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~
-	@$(MAKE) amalgamate
-	@diff $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE) ; false)
-	@diff $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE) ; false)
-	@diff $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE) ; false)
-	@mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE)
-	@mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE)
-	@mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE)
-	@mv BUILD.bazel BUILD.bazel~
-	@$(MAKE) BUILD.bazel
-	@diff BUILD.bazel BUILD.bazel~ || (echo "===================================================================\n  BUILD.bazel is out of date! Please run 'make BUILD.bazel'.\n===================================================================" ; mv BUILD.bazel~ BUILD.bazel ; false)
-	@mv BUILD.bazel~ BUILD.bazel
-	@mv nlohmann_json.natvis nlohmann_json.natvis~
-	@$(MAKE) natvis
-	@diff nlohmann_json.natvis nlohmann_json.natvis~ || (echo "===================================================================\n  nlohmann_json.natvis is out of date! Please run 'make natvis'.\n===================================================================" ; mv nlohmann_json.natvis~ nlohmann_json.natvis ; false)
-	@mv nlohmann_json.natvis~ nlohmann_json.natvis
-	@$(MAKE) macro_builder_check
+	@status=0; \
+	banner() { printf '===================================================================\n  %s\n===================================================================\n' "$$1"; }; \
+	for FILE in $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) BUILD.bazel nlohmann_json.natvis; do \
+	    mv "$$FILE" "$$FILE~" || exit 1; \
+	done; \
+	$(MAKE) amalgamate || status=1; \
+	$(MAKE) BUILD.bazel || status=1; \
+	$(MAKE) natvis || status=1; \
+	for FILE in $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE); do \
+	    diff "$$FILE" "$$FILE~" || { banner "$$FILE is out of date! Amalgamation required! Please read the contribution guidelines in file .github/CONTRIBUTING.md."; status=1; }; \
+	done; \
+	diff BUILD.bazel BUILD.bazel~ || { banner "BUILD.bazel is out of date! Please run 'make BUILD.bazel'."; status=1; }; \
+	diff nlohmann_json.natvis nlohmann_json.natvis~ || { banner "nlohmann_json.natvis is out of date! Please run 'make natvis'."; status=1; }; \
+	for FILE in $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) BUILD.bazel nlohmann_json.natvis; do \
+	    mv "$$FILE~" "$$FILE"; \
+	done; \
+	$(MAKE) macro_builder_check || status=1; \
+	exit $$status
 
 # generate the Bazel BUILD file; phony, because a removed header would not trigger a rebuild
 BUILD.bazel:
@@ -212,8 +223,8 @@ release: include.zip json.tar.xz
 
 # clean up
 clean:
-	rm -fr fuzz fuzz-testing *.dSYM tests/*.dSYM
-	rm -fr cmake-build-benchmarks fuzz-testing cmake-build-pvs-studio release_files
+	rm -fr *.dSYM tests/*.dSYM tests/parse_*_fuzzer
+	rm -fr cmake-build-benchmarks cmake-build-pvs-studio release_files
 	$(MAKE) clean -Cdocs
 
 

README.md

@@ -48,6 +48,7 @@
   - [Pkg-config](#pkg-config)
 - [License](#license)
 - [Contact](#contact)
+- [Security](#security)
 - [Thanks](#thanks)
 - [Used third-party tools](#used-third-party-tools)
 - [Notes](#notes)
@@ -112,9 +113,9 @@ There is also a [**docset**](https://github.com/Kapeli/Dash-User-Contributions/t
 
 ## Quick reference
 
-- **Constructors** [basic_json](https://json.nlohmann.me/api/basic_json/basic_json), [array](https://json.nlohmann.me/api/basic_json/array), [binary](https://json.nlohmann.me/api/basic_json/binary), [object](https://json.nlohmann.me/api/basic_json/object)
+- **Constructors**: [basic_json](https://json.nlohmann.me/api/basic_json/basic_json), [array](https://json.nlohmann.me/api/basic_json/array), [binary](https://json.nlohmann.me/api/basic_json/binary), [object](https://json.nlohmann.me/api/basic_json/object)
 - **Object inspection**: [type](https://json.nlohmann.me/api/basic_json/type), [operator value_t](https://json.nlohmann.me/api/basic_json/operator_value_t), [type_name](https://json.nlohmann.me/api/basic_json/type_name), [is_primitive](https://json.nlohmann.me/api/basic_json/is_primitive), [is_structured](https://json.nlohmann.me/api/basic_json/is_structured), [is_null](https://json.nlohmann.me/api/basic_json/is_null), [is_boolean](https://json.nlohmann.me/api/basic_json/is_boolean), [is_number](https://json.nlohmann.me/api/basic_json/is_number), [is_number_integer](https://json.nlohmann.me/api/basic_json/is_number_integer), [is_number_unsigned](https://json.nlohmann.me/api/basic_json/is_number_unsigned), [is_number_float](https://json.nlohmann.me/api/basic_json/is_number_float), [is_object](https://json.nlohmann.me/api/basic_json/is_object), [is_array](https://json.nlohmann.me/api/basic_json/is_array), [is_string](https://json.nlohmann.me/api/basic_json/is_string), [is_binary](https://json.nlohmann.me/api/basic_json/is_binary), [is_discarded](https://json.nlohmann.me/api/basic_json/is_discarded)
-- **Value access**; [get](https://json.nlohmann.me/api/basic_json/get), [get_to](https://json.nlohmann.me/api/basic_json/get_to), [get_ptr](https://json.nlohmann.me/api/basic_json/get_ptr), [get_ref](https://json.nlohmann.me/api/basic_json/get_ref), [operator ValueType](https://json.nlohmann.me/api/basic_json/operator_ValueType), [get_binary](https://json.nlohmann.me/api/basic_json/get_binary)
+- **Value access**: [get](https://json.nlohmann.me/api/basic_json/get), [get_to](https://json.nlohmann.me/api/basic_json/get_to), [get_ptr](https://json.nlohmann.me/api/basic_json/get_ptr), [get_ref](https://json.nlohmann.me/api/basic_json/get_ref), [operator ValueType](https://json.nlohmann.me/api/basic_json/operator_ValueType), [get_binary](https://json.nlohmann.me/api/basic_json/get_binary)
 - **Element access**: [at](https://json.nlohmann.me/api/basic_json/at), [operator[]](https://json.nlohmann.me/api/basic_json/operator[]), [value](https://json.nlohmann.me/api/basic_json/value), [front](https://json.nlohmann.me/api/basic_json/front), [back](https://json.nlohmann.me/api/basic_json/back)
 - **Lookup**: [find](https://json.nlohmann.me/api/basic_json/find), [count](https://json.nlohmann.me/api/basic_json/count), [contains](https://json.nlohmann.me/api/basic_json/contains)
 - **Iterators**: [begin](https://json.nlohmann.me/api/basic_json/begin), [cbegin](https://json.nlohmann.me/api/basic_json/cbegin), [end](https://json.nlohmann.me/api/basic_json/end), [cend](https://json.nlohmann.me/api/basic_json/cend), [rbegin](https://json.nlohmann.me/api/basic_json/rbegin), [rend](https://json.nlohmann.me/api/basic_json/rend), [crbegin](https://json.nlohmann.me/api/basic_json/crbegin), [crend](https://json.nlohmann.me/api/basic_json/crend), [items](https://json.nlohmann.me/api/basic_json/items)
@@ -1184,7 +1185,7 @@ binary[1]; // 0xFE
 binary.set_subtype(0x10);
 
 // serialize to MessagePack
-auto cbor = json::to_msgpack(j); // 0xD5 (fixext2), 0x10, 0xCA, 0xFE
+auto msgpack = json::to_msgpack(j); // 0xD5 (fixext2), 0x10, 0xCA, 0xFE
 ```
 
 ## Customers
@@ -1220,17 +1221,7 @@ I would be happy to learn about other compilers/versions.
 Please note:
 
 - GCC 4.8 has a bug [57824](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57824): multiline raw strings cannot be the arguments to macros. Don't use multiline raw strings directly in macros with this compiler.
-- Android defaults to using very old compilers and C++ libraries. To fix this, add the following to your `Application.mk`. This will switch to the LLVM C++ library, the Clang compiler, and enable C++11 and other features disabled by default.
-
-    ```makefile
-    APP_STL := c++_shared
-    NDK_TOOLCHAIN_VERSION := clang3.6
-    APP_CPPFLAGS += -frtti -fexceptions
-    ```
-
-    The code compiles successfully with [Android NDK](https://developer.android.com/ndk/index.html?hl=ml), Revision 9 - 11 (and possibly later) and [CrystaX's Android NDK](https://www.crystax.net/en/android/ndk) version 10.
-
-- For GCC running on MinGW or Android SDK, the error `'to_string' is not a member of 'std'` (or similarly, for `strtod` or `strtof`) may occur. Note this is not an issue with the code, but rather with the compiler itself. On Android, see above to build with a newer environment.  For MinGW, please refer to [this site](https://tehsausage.com/mingw-to-string) and [this discussion](https://github.com/nlohmann/json/issues/136) for information on how to fix this bug. For Android NDK using `APP_STL := gnustl_static`, please refer to [this discussion](https://github.com/nlohmann/json/issues/219).
+- For GCC running on MinGW or Android, the error `'to_string' is not a member of 'std'` (or similarly, for `strtod` or `strtof`) may occur. Note this is not an issue with the code, but rather with the compiler or C++ standard library itself: use a recent toolchain (for Android, a current [NDK](https://developer.android.com/ndk) with the LLVM C++ library `APP_STL := c++_shared`, and for MinGW, a distribution with a complete C++11 standard library). See [this discussion](https://github.com/nlohmann/json/issues/136) for MinGW and [this discussion](https://github.com/nlohmann/json/issues/219) for the old Android NDK using `APP_STL := gnustl_static`.
 
 - Unsupported versions of GCC and Clang are rejected by `#error` directives. This can be switched off by defining `JSON_SKIP_UNSUPPORTED_COMPILER_CHECK`. Note that you can expect no support in this case.
 
@@ -1437,436 +1428,416 @@ I deeply appreciate the help of the following people.
 12. [kepkin](https://github.com/kepkin) patiently pushed forward the support for Microsoft Visual Studio.
 13. [gregmarr](https://github.com/gregmarr) simplified the implementation of reverse iterators and helped with numerous hints and improvements. In particular, he pushed forward the implementation of user-defined types.
 14. [Caio Luppi](https://github.com/caiovlp) fixed a bug in the Unicode handling.
-15. [dariomt](https://github.com/dariomt) fixed some typos in the examples.
+15. [dariomt](https://github.com/dariomt) fixed some typos in the examples and fixed a subtlety in MSVC type support and implemented the `get_ref()` function to get a reference to stored values.
 16. [Daniel Frey](https://github.com/d-frey) cleaned up some pointers and implemented exception-safe memory allocation.
 17. [Colin Hirsch](https://github.com/ColinH) took care of a small namespace issue.
 18. [Huu Nguyen](https://github.com/whoshuu) corrected a variable name in the documentation.
 19. [Silverweed](https://github.com/silverweed) overloaded `parse()` to accept an rvalue reference.
-20. [dariomt](https://github.com/dariomt) fixed a subtlety in MSVC type support and implemented the `get_ref()` function to get a reference to stored values.
-21. [ZahlGraf](https://github.com/ZahlGraf) added a workaround that allows compilation using Android NDK.
-22. [whackashoe](https://github.com/whackashoe) replaced a function that was marked as unsafe by Visual Studio.
-23. [406345](https://github.com/406345) fixed two small warnings.
-24. [Glen Fernandes](https://github.com/glenfe) noted a potential portability problem in the `has_mapped_type` function.
-25. [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
-26. [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping. He further added support for unsigned integer numbers and implemented better roundtrip support for parsed numbers.
-27. [Volker Diels-Grabsch](https://github.com/vog) fixed a link in the README file.
-28. [msm-](https://github.com/msm-) added support for American Fuzzy Lop.
-29. [Annihil](https://github.com/Annihil) fixed an example in the README file.
-30. [Themercee](https://github.com/Themercee) noted a wrong URL in the README file.
-31. [Lv Zheng](https://github.com/lv-zheng) fixed a namespace issue with `int64_t` and `uint64_t`.
-32. [abc100m](https://github.com/abc100m) analyzed the issues with GCC 4.8 and proposed a [partial solution](https://github.com/nlohmann/json/pull/212).
-33. [zewt](https://github.com/zewt) added useful notes to the README file about Android.
-34. [Róbert Márki](https://github.com/robertmrk) added a fix to use move iterators and improved the integration via CMake.
-35. [Chris Kitching](https://github.com/ChrisKitching) cleaned up the CMake files.
-36. [Tom Needham](https://github.com/06needhamt) fixed a subtle bug with MSVC 2015 which was also proposed by [Michael K.](https://github.com/Epidal).
-37. [Mário Feroldi](https://github.com/thelostt) fixed a small typo.
-38. [duncanwerner](https://github.com/duncanwerner) found a really embarrassing performance regression in the 2.0.0 release.
-39. [Damien](https://github.com/dtoma) fixed one of the last conversion warnings.
-40. [Thomas Braun](https://github.com/t-b) fixed a warning in a test case and adjusted MSVC calls in the CI.
-41. [Théo DELRIEU](https://github.com/theodelrieu) patiently and constructively oversaw the long way toward [iterator-range parsing](https://github.com/nlohmann/json/issues/290). He also implemented the magic behind the serialization/deserialization of user-defined types and split the single header file into smaller chunks.
-42. [Stefan](https://github.com/5tefan) fixed a minor issue in the documentation.
-43. [Vasil Dimov](https://github.com/vasild) fixed the documentation regarding conversions from `std::multiset`.
-44. [ChristophJud](https://github.com/ChristophJud) overworked the CMake files to ease project inclusion.
-45. [Vladimir Petrigo](https://github.com/vpetrigo) made a SFINAE hack more readable and added Visual Studio 17 to the build matrix.
-46. [Denis Andrejew](https://github.com/seeekr) fixed a grammar issue in the README file.
-47. [Pierre-Antoine Lacaze](https://github.com/palacaze) found a subtle bug in the `dump()` function.
-48. [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](https://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
-49. [cgzones](https://github.com/cgzones) had an idea how to fix the Coverity scan.
-50. [Jared Grubb](https://github.com/jaredgrubb) silenced a nasty documentation warning.
-51. [Yixin Zhang](https://github.com/qwename) fixed an integer overflow check.
-52. [Bosswestfalen](https://github.com/Bosswestfalen) merged two iterator classes into a smaller one.
-53. [Daniel599](https://github.com/Daniel599) helped to get Travis to execute the tests with Clang's sanitizers.
-54. [Jonathan Lee](https://github.com/vjon) fixed an example in the README file.
-55. [gnzlbg](https://github.com/gnzlbg) supported the implementation of user-defined types.
-56. [Alexej Harm](https://github.com/qis) helped to get the user-defined types working with Visual Studio.
-57. [Jared Grubb](https://github.com/jaredgrubb) supported the implementation of user-defined types.
-58. [EnricoBilla](https://github.com/EnricoBilla) noted a typo in an example.
-59. [Martin Hořeňovský](https://github.com/horenmar) found a way for a 2x speedup for the compilation time of the test suite.
-60. [ukhegg](https://github.com/ukhegg) proposed an improvement for the examples section.
-61. [rswanson-ihi](https://github.com/rswanson-ihi) noted a typo in the README.
-62. [Mihai Stan](https://github.com/stanmihai4) fixed a bug in the comparison with `nullptr`s.
-63. [Tushar Maheshwari](https://github.com/tusharpm) added [cotire](https://github.com/sakra/cotire) support to speed up the compilation.
-64. [TedLyngmo](https://github.com/TedLyngmo) noted a typo in the README, removed unnecessary bit arithmetic, and fixed some `-Weffc++` warnings.
-65. [Krzysztof Woś](https://github.com/krzysztofwos) made exceptions more visible.
-66. [ftillier](https://github.com/ftillier) fixed a compiler warning.
-67. [tinloaf](https://github.com/tinloaf) made sure all pushed warnings are properly popped.
-68. [Fytch](https://github.com/Fytch) found a bug in the documentation.
-69. [Jay Sistar](https://github.com/Type1J) implemented a Meson build description.
-70. [Henry Lee](https://github.com/HenryRLee) fixed a warning in ICC and improved the iterator implementation.
-71. [Vincent Thiery](https://github.com/vthiery) maintains a package for the Conan package manager.
-72. [Steffen](https://github.com/koemeet) fixed a potential issue with MSVC and `std::min`.
-73. [Mike Tzou](https://github.com/Chocobo1) fixed some typos.
-74. [amrcode](https://github.com/amrcode) noted misleading documentation about comparison of floats.
-75. [Oleg Endo](https://github.com/olegendo) reduced the memory consumption by replacing `<iostream>` with `<iosfwd>`.
-76. [dan-42](https://github.com/dan-42) cleaned up the CMake files to simplify including/reusing of the library.
-77. [Nikita Ofitserov](https://github.com/himikof) allowed for moving values from initializer lists.
-78. [Greg Hurrell](https://github.com/wincent) fixed a typo.
-79. [Dmitry Kukovinets](https://github.com/DmitryKuk) fixed a typo.
-80. [kbthomp1](https://github.com/kbthomp1) fixed an issue related to the Intel OSX compiler.
-81. [Markus Werle](https://github.com/daixtrose) fixed a typo.
-82. [WebProdPP](https://github.com/WebProdPP) fixed a subtle error in a precondition check.
-83. [Alex](https://github.com/leha-bot) noted an error in a code sample.
-84. [Tom de Geus](https://github.com/tdegeus) reported some warnings with ICC and helped to fix them.
-85. [Perry Kundert](https://github.com/pjkundert) simplified reading from input streams.
-86. [Sonu Lohani](https://github.com/sonulohani) fixed a small compilation error.
-87. [Jamie Seward](https://github.com/jseward) fixed all MSVC warnings.
-88. [Nate Vargas](https://github.com/eld00d) added a Doxygen tag file.
-89. [pvleuven](https://github.com/pvleuven) helped to fix a warning in ICC.
-90. [Pavel](https://github.com/crea7or) helped to fix some warnings in MSVC.
-91. [Jamie Seward](https://github.com/jseward) avoided unnecessary string copies in `find()` and `count()`.
-92. [Mitja](https://github.com/Itja) fixed some typos.
-93. [Jorrit Wronski](https://github.com/jowr) updated the Hunter package links.
-94. [Matthias Möller](https://github.com/TinyTinni) added a `.natvis` for the MSVC debug view.
-95. [bogemic](https://github.com/bogemic) fixed some C++17 deprecation warnings.
-96. [Eren Okka](https://github.com/erengy) fixed some MSVC warnings.
-97. [abolz](https://github.com/abolz) integrated the Grisu2 algorithm for proper floating-point formatting, allowing more roundtrip checks to succeed.
-98. [Vadim Evard](https://github.com/Pipeliner) fixed a Markdown issue in the README.
-99. [zerodefect](https://github.com/zerodefect) fixed a compiler warning.
-100. [Kert](https://github.com/kaidokert) allowed to template the string type in the serialization and added the possibility to override the exceptional behavior.
-101. [mark-99](https://github.com/mark-99) helped fix an ICC error.
-102. [Patrik Huber](https://github.com/patrikhuber) fixed links in the README file.
-103. [johnfb](https://github.com/johnfb) found a bug in the implementation of CBOR's indefinite length strings.
-104. [Paul Fultz II](https://github.com/pfultz2) added a note on the cget package manager.
-105. [Wilson Lin](https://github.com/wla80) made the integration section of the README more concise.
-106. [RalfBielig](https://github.com/ralfbielig) detected and fixed a memory leak in the parser callback.
-107. [agrianius](https://github.com/agrianius) allowed dumping JSON to an alternative string type.
-108. [Kevin Tonon](https://github.com/ktonon) overworked the C++11 compiler checks in CMake.
-109. [Axel Huebl](https://github.com/ax3l) simplified a CMake check and added support for the [Spack package manager](https://spack.io).
-110. [Carlos O'Ryan](https://github.com/coryan) fixed a typo.
-111. [James Upjohn](https://github.com/jupjohn) fixed a version number in the compilers section.
-112. [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines and provided documentation for the CMake integration.
-113. [Jan Schöppach](https://github.com/dns13) fixed a typo.
-114. [martin-mfg](https://github.com/martin-mfg) fixed a typo.
-115. [Matthias Möller](https://github.com/TinyTinni) removed the dependency from `std::stringstream`.
-116. [agrianius](https://github.com/agrianius) added code to use alternative string implementations.
-117. [Daniel599](https://github.com/Daniel599) allowed to use more algorithms with the `items()` function.
-118. [Julius Rakow](https://github.com/juliusrakow) fixed the Meson include directory and fixed the links to [cppreference.com](https://cppreference.com).
-119. [Sonu Lohani](https://github.com/sonulohani) fixed the compilation with MSVC 2015 in debug mode.
-120. [grembo](https://github.com/grembo) fixed the test suite and re-enabled several test cases.
-121. [Hyeon Kim](https://github.com/simnalamburt) introduced the macro `JSON_INTERNAL_CATCH` to control the exception handling inside the library.
-122. [thyu](https://github.com/thyu) fixed a compiler warning.
-123. [David Guthrie](https://github.com/LEgregius) fixed a subtle compilation error with Clang 3.4.2.
-124. [Dennis Fischer](https://github.com/dennisfischer) allowed to call `find_package` without installing the library.
-125. [Hyeon Kim](https://github.com/simnalamburt) fixed an issue with a double macro definition.
-126. [Ben Berman](https://github.com/rivertam) made some error messages more understandable.
-127. [zakalibit](https://github.com/zakalibit) fixed a compilation problem with the Intel C++ compiler.
-128. [mandreyel](https://github.com/mandreyel) fixed a compilation problem.
-129. [Kostiantyn Ponomarenko](https://github.com/koponomarenko) added version and license information to the Meson build file.
-130. [Henry Schreiner](https://github.com/henryiii) added support for GCC 4.8.
-131. [knilch](https://github.com/knilch0r) made sure the test suite does not stall when run in the wrong directory.
-132. [Antonio Borondo](https://github.com/antonioborondo) fixed an MSVC 2017 warning.
-133. [Dan Gendreau](https://github.com/dgendreau) implemented the `NLOHMANN_JSON_SERIALIZE_ENUM` macro to quickly define an enum/JSON mapping.
-134. [efp](https://github.com/efp) added line and column information to parse errors.
-135. [julian-becker](https://github.com/julian-becker) added BSON support.
-136. [Pratik Chowdhury](https://github.com/pratikpc) added support for structured bindings.
-137. [David Avedissian](https://github.com/davedissian) added support for Clang 5.0.1 (PS4 version).
-138. [Jonathan Dumaresq](https://github.com/dumarjo) implemented an input adapter to read from `FILE*`.
-139. [kjpus](https://github.com/kjpus) fixed a link in the documentation.
-140. [Manvendra Singh](https://github.com/manu-chroma) fixed a typo in the documentation.
-141. [ziggurat29](https://github.com/ziggurat29) fixed an MSVC warning.
-142. [Sylvain Corlay](https://github.com/SylvainCorlay) added code to avoid an issue with MSVC.
-143. [mefyl](https://github.com/mefyl) fixed a bug when JSON was parsed from an input stream.
-144. [Millian Poquet](https://github.com/mpoquet) allowed to install the library via Meson.
-145. [Michael Behrns-Miller](https://github.com/moodboom) found an issue with a missing namespace.
-146. [Nasztanovics Ferenc](https://github.com/naszta) fixed a compilation issue with libc 2.12.
-147. [Andreas Schwab](https://github.com/andreas-schwab) fixed the endian conversion.
-148. [Mark-Dunning](https://github.com/Mark-Dunning) fixed a warning in MSVC.
-149. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) added `operator/` for JSON Pointers.
-150. [John-Mark](https://github.com/johnmarkwayve) noted a missing header.
-151. [Vitaly Zaitsev](https://github.com/xvitaly) fixed compilation with GCC 9.0.
-152. [Laurent Stacul](https://github.com/stac47) fixed compilation with GCC 9.0.
-153. [Ivor Wanders](https://github.com/iwanders) helped to reduce the CMake requirement to version 3.1.
-154. [njlr](https://github.com/njlr) updated the Buckaroo instructions.
-155. [Lion](https://github.com/lieff) fixed a compilation issue with GCC 7 on CentOS.
-156. [Isaac Nickaein](https://github.com/nickaein) improved the integer serialization performance and implemented the `contains()` function.
-157. [past-due](https://github.com/past-due) suppressed an unfixable warning.
-158. [Elvis Oric](https://github.com/elvisoric) improved Meson support.
-159. [Matěj Plch](https://github.com/Afforix) fixed an example in the README.
-160. [Mark Beckwith](https://github.com/wythe) fixed a typo.
-161. [scinart](https://github.com/scinart) fixed a bug in the serializer.
-162. [Patrick Boettcher](https://github.com/pboettch) implemented `push_back()` and `pop_back()` for JSON Pointers.
-163. [Bruno Oliveira](https://github.com/nicoddemus) added support for Conda.
-164. [Michele Caini](https://github.com/skypjack) fixed links in the README.
-165. [Hani](https://github.com/hnkb) documented how to install the library with NuGet.
-166. [Mark Beckwith](https://github.com/wythe) fixed a typo.
-167. [yann-morin-1998](https://github.com/yann-morin-1998) helped to reduce the CMake requirement to version 3.1.
-168. [Konstantin Podsvirov](https://github.com/podsvirov) maintains a package for the MSYS2 software distro.
-169. [remyabel](https://github.com/remyabel2) added GNUInstallDirs to the CMake files.
-170. [Taylor Howard](https://github.com/taylorhoward92) fixed a unit test.
-171. [Gabe Ron](https://github.com/Macr0Nerd) implemented the `to_string` method.
-172. [Watal M. Iwasaki](https://github.com/heavywatal) fixed a Clang warning.
-173. [Viktor Kirilov](https://github.com/onqtam) switched the unit tests from [Catch](https://github.com/philsquared/Catch) to [doctest](https://github.com/onqtam/doctest)
-174. [Juncheng E](https://github.com/ejcjason) fixed a typo.
-175. [tete17](https://github.com/tete17) fixed a bug in the `contains` function.
-176. [Xav83](https://github.com/Xav83) fixed some cppcheck warnings.
-177. [0xflotus](https://github.com/0xflotus) fixed some typos.
-178. [Christian Deneke](https://github.com/chris0x44) added a const version of `json_pointer::back`.
-179. [Julien Hamaide](https://github.com/crazyjul) made the `items()` function work with custom string types.
-180. [Evan Nemerson](https://github.com/nemequ) updated fixed a bug in Hedley and updated this library accordingly.
-181. [Florian Pigorsch](https://github.com/flopp) fixed a lot of typos.
-182. [Camille Bégué](https://github.com/cbegue) fixed an issue in the conversion from  `std::pair` and `std::tuple` to `json`.
-183. [Anthony VH](https://github.com/AnthonyVH) fixed a compile error in an enum deserialization.
-184. [Yuriy Vountesmery](https://github.com/ua-code-dragon) noted a subtle bug in a preprocessor check.
-185. [Chen](https://github.com/dota17) fixed numerous issues in the library.
-186. [Antony Kellermann](https://github.com/aokellermann) added a CI step for GCC 10.1.
-187. [Alex](https://github.com/gistrec) fixed an MSVC warning.
-188. [Rainer](https://github.com/rvjr) proposed an improvement in the floating-point serialization in CBOR.
-189. [Francois Chabot](https://github.com/FrancoisChabot) made performance improvements in the input adapters.
-190. [Arthur Sonzogni](https://github.com/ArthurSonzogni) documented how the library can be included via `FetchContent`.
-191. [Rimas Misevičius](https://github.com/rmisev) fixed an error message.
-192. [Alexander Myasnikov](https://github.com/alexandermyasnikov) fixed some examples and a link in the README.
-193. [Hubert Chathi](https://github.com/uhoreg) made CMake's version config file architecture-independent.
-194. [OmnipotentEntity](https://github.com/OmnipotentEntity) implemented the binary values for CBOR, MessagePack, BSON, and UBJSON.
-195. [ArtemSarmini](https://github.com/ArtemSarmini) fixed a compilation issue with GCC 10 and fixed a leak.
-196. [Evgenii Sopov](https://github.com/sea5kg) integrated the library to the wsjcpp package manager.
-197. [Sergey Linev](https://github.com/linev) fixed a compiler warning.
-198. [Miguel Magalhães](https://github.com/magamig) fixed the year in the copyright.
-199. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) fixed a compilation issue with MSVC.
-200. [Alexander “weej” Jones](https://github.com/alex-weej) fixed an example in the README.
-201. [Antoine Cœur](https://github.com/Coeur) fixed some typos in the documentation.
-202. [jothepro](https://github.com/jothepro) updated links to the Hunter package.
-203. [Dave Lee](https://github.com/kastiglione) fixed a link in the README.
-204. [Joël Lamotte](https://github.com/Klaim) added instruction for using Build2's package manager.
-205. [Paul Jurczak](https://github.com/pauljurczak) fixed an example in the README.
-206. [Sonu Lohani](https://github.com/sonulohani) fixed a warning.
-207. [Carlos Gomes Martinho](https://github.com/gocarlos) updated the Conan package source.
-208. [Konstantin Podsvirov](https://github.com/podsvirov) fixed the MSYS2 package documentation.
-209. [Tridacnid](https://github.com/Tridacnid) improved the CMake tests.
-210. [Michael](https://github.com/MBalszun) fixed MSVC warnings.
-211. [Quentin Barbarat](https://github.com/quentin-dev) fixed an example in the documentation.
-212. [XyFreak](https://github.com/XyFreak) fixed a compiler warning.
-213. [TotalCaesar659](https://github.com/TotalCaesar659) fixed links in the README.
-214. [Tanuj Garg](https://github.com/tanuj208) improved the fuzzer coverage for UBSAN input.
-215. [AODQ](https://github.com/AODQ) fixed a compiler warning.
-216. [jwittbrodt](https://github.com/jwittbrodt) made `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE` inline.
-217. [pfeatherstone](https://github.com/pfeatherstone) improved the upper bound of arguments of the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
-218. [Jan Procházka](https://github.com/jprochazk) fixed a bug in the CBOR parser for binary and string values.
-219. [T0b1-iOS](https://github.com/T0b1-iOS) fixed a bug in the new hash implementation.
-220. [Matthew Bauer](https://github.com/matthewbauer) adjusted the CBOR writer to create tags for binary subtypes.
-221. [gatopeich](https://github.com/gatopeich) implemented an ordered map container for `nlohmann::ordered_json`.
-222. [Érico Nogueira Rolim](https://github.com/ericonr) added support for pkg-config.
-223. [KonanM](https://github.com/KonanM) proposed an implementation for the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
-224. [Guillaume Racicot](https://github.com/gracicot) implemented `string_view` support and allowed C++20 support.
-225. [Alex Reinking](https://github.com/alexreinking) improved CMake support for `FetchContent`.
-226. [Hannes Domani](https://github.com/ssbssa) provided a GDB pretty printer.
-227. Lars Wirzenius reviewed the README file.
-228. [Jun Jie](https://github.com/ongjunjie) fixed a compiler path in the CMake scripts.
-229. [Ronak Buch](https://github.com/rbuch) fixed typos in the documentation.
-230. [Alexander Karzhenkov](https://github.com/karzhenkov) fixed a move constructor and the Travis builds.
-231. [Leonardo Lima](https://github.com/leozz37) added CPM.Cmake support.
-232. [Joseph Blackman](https://github.com/jbzdarkid) fixed a warning.
-233. [Yaroslav](https://github.com/YarikTH) updated doctest and implemented unit tests.
-234. [Martin Stump](https://github.com/globberwops) fixed a bug in the CMake files.
-235. [Jaakko Moisio](https://github.com/jasujm) fixed a bug in the input adapters.
-236. [bl-ue](https://github.com/bl-ue) fixed some Markdown issues in the README file.
-237. [William A. Wieselquist](https://github.com/wawiesel) fixed an example from the README.
-238. [abbaswasim](https://github.com/abbaswasim) fixed an example from the README.
-239. [Remy Jette](https://github.com/remyjette) fixed a warning.
-240. [Fraser](https://github.com/frasermarlow) fixed the documentation.
-241. [Ben Beasley](https://github.com/musicinmybrain) updated doctest.
-242. [Doron Behar](https://github.com/doronbehar) fixed pkg-config.pc.
-243. [raduteo](https://github.com/raduteo) fixed a warning.
-244. [David Pfahler](https://github.com/theShmoo) added the possibility to compile the library without I/O support.
-245. [Morten Fyhn Amundsen](https://github.com/mortenfyhn) fixed a typo.
-246. [jpl-mac](https://github.com/jpl-mac) allowed treating the library as a system header in CMake.
-247. [Jason Dsouza](https://github.com/jasmcaus) fixed the indentation of the CMake file.
-248. [offa](https://github.com/offa) added a link to Conan Center to the documentation.
-249. [TotalCaesar659](https://github.com/TotalCaesar659) updated the links in the documentation to use HTTPS.
-250. [Rafail Giavrimis](https://github.com/grafail) fixed the Google Benchmark default branch.
-251. [Louis Dionne](https://github.com/ldionne) fixed a conversion operator.
-252. [justanotheranonymoususer](https://github.com/justanotheranonymoususer) made the examples in the README more consistent.
-253. [Finkman](https://github.com/Finkman) suppressed some `-Wfloat-equal` warnings.
-254. [Ferry Huberts](https://github.com/fhuberts) fixed `-Wswitch-enum` warnings.
-255. [Arseniy Terekhin](https://github.com/senyai) made the GDB pretty-printer robust against unset variable names.
-256. [Amir Masoud Abdol](https://github.com/amirmasoudabdol) updated the Homebrew command as nlohmann/json is now in homebrew-core.
-257. [Hallot](https://github.com/Hallot) fixed some `-Wextra-semi-stmt warnings`.
-258. [Giovanni Cerretani](https://github.com/gcerretani) fixed `-Wunused` warnings on `JSON_DIAGNOSTICS`.
-259. [Bogdan Popescu](https://github.com/Kapeli) hosts the [docset](https://github.com/Kapeli/Dash-User-Contributions/tree/master/docsets/JSON_for_Modern_C%2B%2B) for offline documentation viewers.
-260. [Carl Smedstad](https://github.com/carlsmedstad) fixed an assertion error when using `JSON_DIAGNOSTICS`.
-261. [miikka75](https://github.com/miikka75) provided an important fix to compile C++17 code with Clang 9.
-262. [Maarten Becker](https://github.com/kernie) fixed a warning for shadowed variables.
-263. [Cristi Vîjdea](https://github.com/axnsan12) fixed typos in the `operator[]` documentation.
-264. [Alex Beregszaszi](https://github.com/axic) fixed spelling mistakes in comments.
-265. [Dirk Stolle](https://github.com/striezel) fixed typos in documentation.
-266. [Daniel Albuschat](https://github.com/daniel-kun) corrected the parameter name in the `parse` documentation.
-267. [Prince Mendiratta](https://github.com/Prince-Mendiratta) fixed a link to the FAQ.
-268. [Florian Albrechtskirchinger](https://github.com/falbrechtskirchinger) implemented `std::string_view` support for object keys and made dozens of other improvements.
-269. [Qianqian Fang](https://github.com/fangq) implemented the Binary JData (BJData) format.
-270. [pketelsen](https://github.com/pketelsen) added macros `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` and `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT`.
-271. [DarkZeros](https://github.com/DarkZeros) adjusted to code to not clash with Arduino defines.
-272. [flagarde](https://github.com/flagarde) fixed the output of `meta()` for MSVC.
-273. [Giovanni Cerretani](https://github.com/gcerretani) fixed a check for `std::filesystem`.
-274. [Dimitris Apostolou](https://github.com/rex4539) fixed a typo.
-275. [Ferry Huberts](https://github.com/fhuberts) fixed a typo.
-276. [Michael Nosthoff](https://github.com/heinemml) fixed a typo.
-277. [JungHoon Lee](https://github.com/jhnlee) fixed a typo.
-278. [Faruk D.](https://github.com/fdiblen) fixed the CITATION.CFF file.
-279. [Andrea Cocito](https://github.com/puffetto) added a clarification on macro usage to the documentation.
-280. [Krzysiek Karbowiak](https://github.com/kkarbowiak) refactored the tests to use `CHECK_THROWS_WITH_AS`.
-281. [Chaoqi Zhang](https://github.com/prncoprs) fixed a typo.
-282. [ivanovmp](https://github.com/ivanovmp) fixed a whitespace error.
-283. [KsaNL](https://github.com/KsaNL) fixed a build error when including `<windows.h>`.
-284. [Andrea Pappacoda](https://github.com/Tachi107) moved `.pc` and `.cmake` files to `share` directory.
-285. [Wolf Vollprecht](https://github.com/wolfv) added the `patch_inplace` function.
-286. [Jake Zimmerman](https://github.com/jez) highlighted common usage patterns in the README file.
-287. [NN](https://github.com/NN---) added the Visual Studio output directory to `.gitignore`.
-288. [Romain Reignier](https://github.com/romainreignier) improved the performance of the vector output adapter.
-289. [Mike](https://github.com/Mike-Leo-Smith) fixed the `std::iterator_traits`.
-290. [Richard Hozák](https://github.com/richardhozak) added macro `JSON_NO_ENUM` to disable default enum conversions.
-291. [vakokako](https://github.com/vakokako) fixed tests when compiling with C++20.
-292. [Alexander “weej” Jones](https://github.com/alexweej) fixed an example in the README.
-293. [Eli Schwartz](https://github.com/eli-schwartz) added more files to the `include.zip` archive.
-294. [Kevin Lu](https://github.com/kevinlul) fixed a compilation issue when typedefs with certain names were present.
-295. [Trevor Hickey](https://github.com/luxe) improved the description of an example.
-296. [Jef LeCompte](https://github.com/jef) updated the year in the README file.
-297. [Alexandre Hamez](https://github.com/ahamez) fixed a warning.
-298. [Maninderpal Badhan](https://github.com/mbadhan) fixed a typo.
-299. [kevin--](https://github.com/kevin--) added a note to an example in the README file.
-300. [I](https://github.com/wx257osn2) fixed a typo.
-301. [Gregorio Litenstein](https://github.com/Lord-Kamina) fixed the Clang detection.
-302. [Andreas Smas](https://github.com/andoma) added a Doozer badge.
-303. [WanCW](https://github.com/wancw) fixed the string conversion with Clang.
-304. [zhaohuaxishi](https://github.com/zhaohuaxishi) fixed a Doxygen error.
-305. [emvivre](https://github.com/emvivre) removed an invalid parameter from CMake.
-306. [Tobias Hermann](https://github.com/Dobiasd) fixed a link in the README file.
-307. [Michael](https://github.com/traits) fixed a warning.
-308. [Ryan Mulder](https://github.com/ryanjmulder) added `ensure_ascii` to the `dump` function.
-309. [Muri Nicanor](https://github.com/murinicanor) fixed the `sed` discovery in the Makefile.
-310. [David Avedissian](https://github.com/dgavedissian) implemented SFINAE-friendly `iterator_traits`.
-311. [AQNOUCH Mohammed](https://github.com/aqnouch) fixed a typo in the README.
-312. [Gareth Sylvester-Bradley](https://github.com/garethsb) added `operator/=` and `operator/` to construct JSON pointers.
-313. [Michael Macnair](https://github.com/mykter) added support for afl-fuzz testing.
-314. [Berkus Decker](https://github.com/berkus) fixed a typo in the README.
-315. [Illia Polishchuk](https://github.com/ilqvya) improved the CMake testing.
-316. [Ikko Ashimine](https://github.com/eltociear) fixed a typo.
-317. [Raphael Grimm](https://github.com/barcode) added the possibility to define a custom base class.
-318. [tocic](https://github.com/tocic) fixed typos in the documentation.
-319. [Vertexwahn](https://github.com/Vertexwahn) added Bazel build support.
-320. [Dirk Stolle](https://github.com/striezel) fixed typos in the documentation.
-321. [DavidKorczynski](https://github.com/DavidKorczynski) added a CIFuzz CI GitHub action.
-322. [Finkman](https://github.com/Finkman) fixed the debug pretty-printer.
-323. [Florian Segginger](https://github.com/floriansegginger) bumped the years in the README.
-324. [haadfida](https://github.com/haadfida) cleaned up the badges of used services.
-325. [Arsen Arsenović](https://github.com/ArsenArsen) fixed a build error.
-326. [theevilone45](https://github.com/theevilone45) fixed a typo in a CMake file.
-327. [Sergei Trofimovich](https://github.com/trofi) fixed the custom allocator support.
-328. [Joyce](https://github.com/joycebrum) fixed some security issues in the GitHub workflows.
-329. [Nicolas Jakob](https://github.com/njakob) add vcpkg version badge.
-330. [Tomerkm](https://github.com/Tomerkm) added tests.
-331. [No.](https://github.com/tusooa) fixed the use of `get<>` calls.
-332. [taro](https://github.com/tarolling) fixed a typo in the `CODEOWNERS` file.
-333. [Ikko Eltociear Ashimine](https://github.com/eltociear) fixed a typo.
-334. [Felix Yan](https://github.com/felixonmars) fixed a typo in the README.
-335. [HO-COOH](https://github.com/HO-COOH) fixed a parenthesis in the documentation.
-336. [Ivor Wanders](https://github.com/iwanders) fixed the examples to catch exception by `const&`.
-337. [miny1233](https://github.com/miny1233) fixed a parenthesis in the documentation.
-338. [tomalakgeretkal](https://github.com/tomalakgeretkal) fixed a compilation error.
-339. [alferov](https://github.com/ALF-ONE) fixed a compilation error.
-340. [Craig Scott](https://github.com/craigscott-crascit) fixed a deprecation warning in CMake.
-341. [Vyacheslav Zhdanovskiy](https://github.com/ZeronSix) added macros for serialization-only types.
-342. [Mathieu Westphal](https://github.com/mwestphal) fixed typos.
-343. [scribam](https://github.com/scribam) fixed the MinGW workflow.
-344. [Aleksei Sapitskii](https://github.com/aleksproger) added support for Apple's Swift Package Manager.
-345. [Benjamin Buch](https://github.com/bebuch) fixed the installation path in CMake.
-346. [Colby Haskell](https://github.com/colbychaskell) clarified the parse error message in case a file cannot be opened.
-347. [Juan Carlos Arevalo Baeza](https://github.com/TheJCAB) fixed the enum conversion.
-348. [alferov](https://github.com/ALF-ONE) fixed a version in the documentation.
-349. [ss](https://github.com/serge-s) fixed the amalgamation call.
-350. [AniketDhemare](https://github.com/AniketDhemare) fixed a version in the documentation.
-351. [Philip Müller](https://github.com/philip-paul-mueller) fixed an example.
-352. [Leila Shcheglova](https://github.com/LeilaShcheglova) fixed a warning in a test.
-353. [Alex Prabhat Bara](https://github.com/alexprabhat99) fixed a function name in the documentation.
-354. [laterlaugh](https://github.com/laterlaugh) fixed some typos.
-355. [Yuanhao Jia](https://github.com/MrJia1997) fixed the GDB pretty printer.
-356. [Fallen_Breath](https://github.com/Fallen-Breath) fixed an example for JSON Pointer.
-357. [Nikhil Idiculla](https://github.com/tsnl) fixed some typos.
-358. [Griffin Myers](https://github.com/gmyers18) updated the Natvis file.
-359. [thetimr](https://github.com/thetimr) fixed a typo in the documentation.
-360. [Balazs Erseki](https://github.com/zerocukor287) fixed a URL in the contribution guidelines.
-361. [Niccolò Iardella](https://github.com/rotolof) added `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
-362. [Borislav Stanimirov](https://github.com/iboB) allowed overriding the CMake target name.
-363. [Captain Crutches](https://github.com/captaincrutches) made `iterator_proxy_value` a `std::forward_iterator`.
-364. [Fredrik Sandhei](https://github.com/fsandhei) added type conversion support for `std::optional`.
-365. [jh96](https://github.com/jordan-hoang) added exceptions when `nullptr` is passed to `parse`.
-366. [Stuart Gorman](https://github.com/StuartGorman) fixed number parsing when `EINTR` set in `errno`.
-367. [Dylan Baker](https://github.com/dcbaker) generated a pkg-config file that follows the pkg-config conventions.
-368. [Tianyi Chen](https://github.com/TianyiChen) optimized the binary `get_number` implementation.
-369. [peng-wang-cn](https://github.com/peng-wang-cn) added type conversion support for multidimensional arrays.
-370. [Einars Netlis-Galejs](https://github.com/EinarsNG) added `ONLY_SERIALIZE` for `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
-371. [Marcel](https://github.com/mering) removed `alwayslink=True` Bazel flag.
-372. [Harinath Nampally](https://github.com/hnampally) added diagnostic positions to exceptions.
-373. [Nissim Armand Ben Danan](https://github.com/NissimBendanan) fixed `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` with an empty JSON instance.
-374. [Michael Valladolid](https://github.com/codenut) added support for BSON uint64 serialization/deserialization.
-375. [Nikhil](https://github.com/nikhilreddydev) updated the documentation.
-376. [Nebojša Cvetković](https://github.com/nebkat) added support for BJDATA optimized binary array type.
-377. [Sushrut Shringarputale](https://github.com/sushshring) added support for diagnostic positions. 
-378. [kimci86](https://github.com/kimci86) templated to `NLOHMANN_DEFINE_TYPE` macros to also support `ordered_json`.
-379. [Richard Topchii](https://github.com/richardtop) added support for VisionOS in the Swift Package Manager.
-380. [Robert Chisholm](https://github.com/Robadob) fixed a typo.
-381. [zjyhjqs](https://github.com/zjyhjqs) added CPack support.
-382. [bitFiedler](https://github.com/bitFiedler) made GDB pretty printer work with Python 3.8.
-383. [Gianfranco Costamagna](https://github.com/LocutusOfBorg) fixed a compiler warning.
-384. [risa2000](https://github.com/risa2000) made `std::filesystem::path` conversion to/from UTF-8 encoded string explicit.
-385. [AM](https://github.com/maqnouch) fixed typos in the README.
-386. [dmenendez-gruposantander](https://github.com/dmenendez-gruposantander) fixed typos in the comments of the examples.
-387. [Mihai Stan](https://github.com/mstan-xx) fixed comparisons against the literal `0`.
-388. [Matt Gumbel](https://github.com/intelmatt) fixed some `-Weffc++` warnings.
-389. [vimpunk](https://github.com/vimpunk) moved a lambda out of an unevaluated context to support older compilers.
-390. [Chris Harris](https://github.com/cjh1) fixed the compilation with GCC 4.8.
-391. [Palmer Dabbelt](https://github.com/palmer-dabbelt) generated and installed a pkg-config file.
-392. [Gus Pozuelo](https://github.com/ap-viavi) made `ordered_map` compatible with GCC 5.5, Clang 3.6, and Xcode 9.
-393. [AK](https://github.com/Lioncky) fixed an MSVC build error caused by the `min`/`max` macros from `windows.h`.
-394. [Sergiu Deitsch](https://github.com/sergiud) provided a fallback for missing `char8_t` support.
-395. [Xiaochuan Ye](https://github.com/XueSongTap) fixed `from_msgpack` for `std::byte` input by specializing `std::char_traits`.
-396. [Ville Vesilehto](https://github.com/thevilledev) fixed an overflow in the BJData size calculation and rejected overflowing negative integers in CBOR.
-397. [NmPassTHFan](https://github.com/nmpassthf) replaced the deprecated `std::is_trivial` for C++26.
-398. [Chris Ever](https://github.com/chirsz-ever) added the `ignore_trailing_commas` parser option.
-399. [Kuan-Fu Wu](https://github.com/kfwu1999) fixed the example code for `json_pointer` initialization.
-400. [David Kilzer](https://github.com/ddkilzer) added a missing header to the input adapters.
-401. [Miko](https://github.com/mikomikotaishi) added proper C++20 module support, simplified the module API, and fixed missing exports.
-402. [hitgirl](https://github.com/hitgil) fixed the CMake configuration when cross-compiling.
-403. [Devon Thomas](https://github.com/ThomaDevOSU) mentioned the Artistic Style formatting in the contribution guidelines.
-404. [Erik Hu](https://github.com/Erikhu1) made Coveralls upload errors non-fatal in the CI.
-405. [co63oc](https://github.com/co63oc) fixed typos.
-406. [DmitriBogdanov](https://github.com/DmitriBogdanov) fixed broken package manager links in the documentation.
-407. [Bander](https://github.com/banderzhm) improved the MSVC compatibility of the C++ modules.
-408. [Andy Choi](https://github.com/ccpong) removed an unnecessary `template` keyword before `get` in the README and the documentation.
-409. [SamareshSingh](https://github.com/ssam18) fixed single-element brace initialization to copy/move instead of wrapping in an array, fixed the `WITH_DEFAULT` macros for `ordered_map`, and handled moved events in `serve_header.py`.
-410. [Aditya](https://github.com/Lumowhisp) improved the documentation of the documentation generation.
-411. [cheese1](https://github.com/cheese1) clarified the README.
-412. [KhloodElhossiny](https://github.com/khloodelhossiny) enabled `std::string_view` keys in `operator[]`.
-413. [Charles Cabergs](https://github.com/cacharle) fixed a `-Wtautological-constant-out-of-range-compare` warning.
-414. [EALePain](https://github.com/EALePain) made the `std::tuple` conversion work with reference types such as `std::tie`.
-415. [koala_oishi](https://github.com/chibi-dogs) fixed grammatical wording in the README.
-416. [riccardoori11](https://github.com/riccardoori11) fixed a typo in the documentation.
-417. [Swastik Bose](https://github.com/VasuBhakt) fixed the parent pointers after `update()` with `JSON_DIAGNOSTICS` and fixed the Doxygen autolinking of requirements.
-418. [trdesilva](https://github.com/trdesilva) added `front`, `pop_front`, and `push_front` to `json_pointer`.
-419. [Akhilesh Arora](https://github.com/akhilesharora) fixed an incomplete-type error with `ordered_json`.
-420. [Hariom Phulre](https://github.com/hariomphulre) fixed the C++20 modules compilation with GCC.
-421. [Kirill Lokotkov](https://github.com/RUSLoker) fixed printing `long double` values.
-422. [George Sedov](https://github.com/radistmorse) added the `NLOHMANN_DEFINE_TYPE_*_WITH_NAMES` macros.
-423. [Caillin Nugent](https://github.com/nugentcaillin) added the `NLOHMANN_JSON_SERIALIZE_ENUM_STRICT` macro.
-424. [Cosmin D.](https://github.com/drcosmin) fixed `std::filesystem::path` conversions and added an MSVC workaround for `std::unique_ptr`.
-425. [Paul Dreik](https://github.com/pauldreik) fixed a test relying on implementation-specific behavior.
-426. [Daniel Falk](https://github.com/daniel-falk) added missing copyright notices to the SBOM.
-427. [Federico Sfriso](https://github.com/federicosfriso05-dotcom) added support for constructing JSON values from C++20 range views.
-428. [Luke Banicevic](https://github.com/banaboi) fixed corrupt BSON output for lengths exceeding `INT32_MAX`, cleaned up the BSON writer, and improved the documentation.
-429. [Patrick Armstrong](https://github.com/Patrick10199) updated the CBOR references and the half-precision float assertions.
-430. [Yash Bavadiya](https://github.com/xevrion) added checks to all BSON reads.
-431. [hum4nBeing](https://github.com/hum4nBeing) fixed the overflow handling of high-precision numbers in UBJSON.
-432. [tomatotomata](https://github.com/tomatotomata) added checks for reading CBOR tagged subtypes.
-433. [YingqiDuan](https://github.com/YingqiDuan) documented the BSON interoperability.
-434. [KBS](https://github.com/youdie006) documented the standards compliance and the strictness of `parse()` and `operator>>`.
-435. [Petr Bělohlávek](https://github.com/petrbel) added Clang 21 and 22 to the CI.
-436. [Dmitry Rantovov](https://github.com/darkdi) fixed the placement of a CBOR documentation block.
-437. [ljcjclljc](https://github.com/ljcjclljc) fixed the comparison of large unsigned integers with signed integers.
-438. [Sahil Kamate](https://github.com/sahilkamate03) fixed the handling of CBOR tags 0-5 and 21-23.
-439. [Krishnanand G](https://github.com/Krishnanand-G) made the UBJSON writer reject `use_type` without `use_size`.
-440. [whn](https://github.com/Whning0513) documented the lenient BSON input handling and corrected the complexity of `to_bson`.
-441. [elix3r](https://github.com/22elix3r) fixed `update()` with `merge_objects` when merging a primitive into an object.
-442. [Avionic Harshit](https://github.com/avionicharshit-byte) made `diff()` linear when an array shrinks.
-443. [Qatadaha Bin Matloob](https://github.com/qatcod) fixed comparisons between integers and floats and fixed unparsable BJData output.
-444. [Wu Shuwen](https://github.com/dajiaohuang) removed an unused include.
+20. [ZahlGraf](https://github.com/ZahlGraf) added a workaround that allows compilation using Android NDK.
+21. [whackashoe](https://github.com/whackashoe) replaced a function that was marked as unsafe by Visual Studio.
+22. [406345](https://github.com/406345) fixed two small warnings.
+23. [Glen Fernandes](https://github.com/glenfe) noted a potential portability problem in the `has_mapped_type` function.
+24. [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
+25. [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping. He further added support for unsigned integer numbers and implemented better roundtrip support for parsed numbers.
+26. [Volker Diels-Grabsch](https://github.com/vog) fixed a link in the README file.
+27. [msm-](https://github.com/msm-) added support for American Fuzzy Lop.
+28. [Annihil](https://github.com/Annihil) fixed an example in the README file.
+29. [Themercee](https://github.com/Themercee) noted a wrong URL in the README file.
+30. [Lv Zheng](https://github.com/lv-zheng) fixed a namespace issue with `int64_t` and `uint64_t`.
+31. [abc100m](https://github.com/abc100m) analyzed the issues with GCC 4.8 and proposed a [partial solution](https://github.com/nlohmann/json/pull/212).
+32. [zewt](https://github.com/zewt) added useful notes to the README file about Android.
+33. [Róbert Márki](https://github.com/robertmrk) added a fix to use move iterators and improved the integration via CMake.
+34. [Chris Kitching](https://github.com/ChrisKitching) cleaned up the CMake files.
+35. [Tom Needham](https://github.com/06needhamt) fixed a subtle bug with MSVC 2015 which was also proposed by [Michael K.](https://github.com/Epidal).
+36. [Mário Feroldi](https://github.com/thelostt) fixed a small typo.
+37. [duncanwerner](https://github.com/duncanwerner) found a really embarrassing performance regression in the 2.0.0 release.
+38. [Damien](https://github.com/dtoma) fixed one of the last conversion warnings.
+39. [Thomas Braun](https://github.com/t-b) fixed a warning in a test case and adjusted MSVC calls in the CI.
+40. [Théo DELRIEU](https://github.com/theodelrieu) patiently and constructively oversaw the long way toward [iterator-range parsing](https://github.com/nlohmann/json/issues/290). He also implemented the magic behind the serialization/deserialization of user-defined types and split the single header file into smaller chunks.
+41. [Stefan](https://github.com/5tefan) fixed a minor issue in the documentation.
+42. [Vasil Dimov](https://github.com/vasild) fixed the documentation regarding conversions from `std::multiset`.
+43. [ChristophJud](https://github.com/ChristophJud) overworked the CMake files to ease project inclusion.
+44. [Vladimir Petrigo](https://github.com/vpetrigo) made a SFINAE hack more readable and added Visual Studio 17 to the build matrix.
+45. [Denis Andrejew](https://github.com/seeekr) fixed a grammar issue in the README file.
+46. [Pierre-Antoine Lacaze](https://github.com/palacaze) found a subtle bug in the `dump()` function.
+47. [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](https://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
+48. [cgzones](https://github.com/cgzones) had an idea how to fix the Coverity scan.
+49. [Jared Grubb](https://github.com/jaredgrubb) silenced a nasty documentation warning and supported the implementation of user-defined types.
+50. [Yixin Zhang](https://github.com/qwename) fixed an integer overflow check.
+51. [Bosswestfalen](https://github.com/Bosswestfalen) merged two iterator classes into a smaller one.
+52. [Daniel599](https://github.com/Daniel599) helped to get Travis to execute the tests with Clang's sanitizers and allowed to use more algorithms with the `items()` function.
+53. [Jonathan Lee](https://github.com/vjon) fixed an example in the README file.
+54. [gnzlbg](https://github.com/gnzlbg) supported the implementation of user-defined types.
+55. [Alexej Harm](https://github.com/qis) helped to get the user-defined types working with Visual Studio.
+56. [EnricoBilla](https://github.com/EnricoBilla) noted a typo in an example.
+57. [Martin Hořeňovský](https://github.com/horenmar) found a way for a 2x speedup for the compilation time of the test suite.
+58. [ukhegg](https://github.com/ukhegg) proposed an improvement for the examples section.
+59. [rswanson-ihi](https://github.com/rswanson-ihi) noted a typo in the README.
+60. [Mihai Stan](https://github.com/stanmihai4) fixed a bug in the comparison with `nullptr`s.
+61. [Tushar Maheshwari](https://github.com/tusharpm) added [cotire](https://github.com/sakra/cotire) support to speed up the compilation.
+62. [TedLyngmo](https://github.com/TedLyngmo) noted a typo in the README, removed unnecessary bit arithmetic, and fixed some `-Weffc++` warnings.
+63. [Krzysztof Woś](https://github.com/krzysztofwos) made exceptions more visible.
+64. [ftillier](https://github.com/ftillier) fixed a compiler warning.
+65. [tinloaf](https://github.com/tinloaf) made sure all pushed warnings are properly popped.
+66. [Fytch](https://github.com/Fytch) found a bug in the documentation.
+67. [Jay Sistar](https://github.com/Type1J) implemented a Meson build description.
+68. [Henry Lee](https://github.com/HenryRLee) fixed a warning in ICC and improved the iterator implementation.
+69. [Vincent Thiery](https://github.com/vthiery) maintains a package for the Conan package manager.
+70. [Steffen](https://github.com/koemeet) fixed a potential issue with MSVC and `std::min`.
+71. [Mike Tzou](https://github.com/Chocobo1) fixed some typos.
+72. [amrcode](https://github.com/amrcode) noted misleading documentation about comparison of floats.
+73. [Oleg Endo](https://github.com/olegendo) reduced the memory consumption by replacing `<iostream>` with `<iosfwd>`.
+74. [dan-42](https://github.com/dan-42) cleaned up the CMake files to simplify including/reusing of the library.
+75. [Nikita Ofitserov](https://github.com/himikof) allowed for moving values from initializer lists.
+76. [Greg Hurrell](https://github.com/wincent) fixed a typo.
+77. [Dmitry Kukovinets](https://github.com/DmitryKuk) fixed a typo.
+78. [kbthomp1](https://github.com/kbthomp1) fixed an issue related to the Intel OSX compiler.
+79. [Markus Werle](https://github.com/daixtrose) fixed a typo.
+80. [WebProdPP](https://github.com/WebProdPP) fixed a subtle error in a precondition check.
+81. [Alex](https://github.com/leha-bot) noted an error in a code sample.
+82. [Tom de Geus](https://github.com/tdegeus) reported some warnings with ICC and helped to fix them.
+83. [Perry Kundert](https://github.com/pjkundert) simplified reading from input streams.
+84. [Sonu Lohani](https://github.com/sonulohani) fixed a small compilation error, fixed the compilation with MSVC 2015 in debug mode and fixed a warning.
+85. [Jamie Seward](https://github.com/jseward) fixed all MSVC warnings and avoided unnecessary string copies in `find()` and `count()`.
+86. [Nate Vargas](https://github.com/eld00d) added a Doxygen tag file.
+87. [pvleuven](https://github.com/pvleuven) helped to fix a warning in ICC.
+88. [Pavel](https://github.com/crea7or) helped to fix some warnings in MSVC.
+89. [Mitja](https://github.com/Itja) fixed some typos.
+90. [Jorrit Wronski](https://github.com/jowr) updated the Hunter package links.
+91. [Matthias Möller](https://github.com/TinyTinni) added a `.natvis` for the MSVC debug view and removed the dependency from `std::stringstream`.
+92. [bogemic](https://github.com/bogemic) fixed some C++17 deprecation warnings.
+93. [Eren Okka](https://github.com/erengy) fixed some MSVC warnings.
+94. [abolz](https://github.com/abolz) integrated the Grisu2 algorithm for proper floating-point formatting, allowing more roundtrip checks to succeed.
+95. [Vadim Evard](https://github.com/Pipeliner) fixed a Markdown issue in the README.
+96. [zerodefect](https://github.com/zerodefect) fixed a compiler warning.
+97. [Kert](https://github.com/kaidokert) allowed to template the string type in the serialization and added the possibility to override the exceptional behavior.
+98. [mark-99](https://github.com/mark-99) helped fix an ICC error.
+99. [Patrik Huber](https://github.com/patrikhuber) fixed links in the README file.
+100. [johnfb](https://github.com/johnfb) found a bug in the implementation of CBOR's indefinite length strings.
+101. [Paul Fultz II](https://github.com/pfultz2) added a note on the cget package manager.
+102. [Wilson Lin](https://github.com/wla80) made the integration section of the README more concise.
+103. [RalfBielig](https://github.com/ralfbielig) detected and fixed a memory leak in the parser callback.
+104. [agrianius](https://github.com/agrianius) allowed dumping JSON to an alternative string type and added code to use alternative string implementations.
+105. [Kevin Tonon](https://github.com/ktonon) overworked the C++11 compiler checks in CMake.
+106. [Axel Huebl](https://github.com/ax3l) simplified a CMake check and added support for the [Spack package manager](https://spack.io).
+107. [Carlos O'Ryan](https://github.com/coryan) fixed a typo.
+108. [James Upjohn](https://github.com/jupjohn) fixed a version number in the compilers section.
+109. [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines and provided documentation for the CMake integration.
+110. [Jan Schöppach](https://github.com/dns13) fixed a typo.
+111. [martin-mfg](https://github.com/martin-mfg) fixed a typo.
+112. [Julius Rakow](https://github.com/juliusrakow) fixed the Meson include directory and fixed the links to [cppreference.com](https://cppreference.com).
+113. [grembo](https://github.com/grembo) fixed the test suite and re-enabled several test cases.
+114. [Hyeon Kim](https://github.com/simnalamburt) introduced the macro `JSON_INTERNAL_CATCH` to control the exception handling inside the library and fixed an issue with a double macro definition.
+115. [thyu](https://github.com/thyu) fixed a compiler warning.
+116. [David Guthrie](https://github.com/LEgregius) fixed a subtle compilation error with Clang 3.4.2.
+117. [Dennis Fischer](https://github.com/dennisfischer) allowed to call `find_package` without installing the library.
+118. [Ben Berman](https://github.com/rivertam) made some error messages more understandable.
+119. [zakalibit](https://github.com/zakalibit) fixed a compilation problem with the Intel C++ compiler.
+120. [mandreyel](https://github.com/mandreyel) fixed a compilation problem.
+121. [Kostiantyn Ponomarenko](https://github.com/koponomarenko) added version and license information to the Meson build file.
+122. [Henry Schreiner](https://github.com/henryiii) added support for GCC 4.8.
+123. [knilch](https://github.com/knilch0r) made sure the test suite does not stall when run in the wrong directory.
+124. [Antonio Borondo](https://github.com/antonioborondo) fixed an MSVC 2017 warning.
+125. [Dan Gendreau](https://github.com/dgendreau) implemented the `NLOHMANN_JSON_SERIALIZE_ENUM` macro to quickly define an enum/JSON mapping.
+126. [efp](https://github.com/efp) added line and column information to parse errors.
+127. [julian-becker](https://github.com/julian-becker) added BSON support.
+128. [Pratik Chowdhury](https://github.com/pratikpc) added support for structured bindings.
+129. [David Avedissian](https://github.com/davedissian) added support for Clang 5.0.1 (PS4 version).
+130. [Jonathan Dumaresq](https://github.com/dumarjo) implemented an input adapter to read from `FILE*`.
+131. [kjpus](https://github.com/kjpus) fixed a link in the documentation.
+132. [Manvendra Singh](https://github.com/manu-chroma) fixed a typo in the documentation.
+133. [ziggurat29](https://github.com/ziggurat29) fixed an MSVC warning.
+134. [Sylvain Corlay](https://github.com/SylvainCorlay) added code to avoid an issue with MSVC.
+135. [mefyl](https://github.com/mefyl) fixed a bug when JSON was parsed from an input stream.
+136. [Millian Poquet](https://github.com/mpoquet) allowed to install the library via Meson.
+137. [Michael Behrns-Miller](https://github.com/moodboom) found an issue with a missing namespace.
+138. [Nasztanovics Ferenc](https://github.com/naszta) fixed a compilation issue with libc 2.12.
+139. [Andreas Schwab](https://github.com/andreas-schwab) fixed the endian conversion.
+140. [Mark-Dunning](https://github.com/Mark-Dunning) fixed a warning in MSVC.
+141. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) added `operator/` for JSON Pointers and fixed a compilation issue with MSVC.
+142. [John-Mark](https://github.com/johnmarkwayve) noted a missing header.
+143. [Vitaly Zaitsev](https://github.com/xvitaly) fixed compilation with GCC 9.0.
+144. [Laurent Stacul](https://github.com/stac47) fixed compilation with GCC 9.0.
+145. [Ivor Wanders](https://github.com/iwanders) helped to reduce the CMake requirement to version 3.1 and fixed the examples to catch exception by `const&`.
+146. [njlr](https://github.com/njlr) updated the Buckaroo instructions.
+147. [Lion](https://github.com/lieff) fixed a compilation issue with GCC 7 on CentOS.
+148. [Isaac Nickaein](https://github.com/nickaein) improved the integer serialization performance and implemented the `contains()` function.
+149. [past-due](https://github.com/past-due) suppressed an unfixable warning.
+150. [Elvis Oric](https://github.com/elvisoric) improved Meson support.
+151. [Matěj Plch](https://github.com/Afforix) fixed an example in the README.
+152. [Mark Beckwith](https://github.com/wythe) fixed two typos.
+153. [scinart](https://github.com/scinart) fixed a bug in the serializer.
+154. [Patrick Boettcher](https://github.com/pboettch) implemented `push_back()` and `pop_back()` for JSON Pointers.
+155. [Bruno Oliveira](https://github.com/nicoddemus) added support for Conda.
+156. [Michele Caini](https://github.com/skypjack) fixed links in the README.
+157. [Hani](https://github.com/hnkb) documented how to install the library with NuGet.
+158. [yann-morin-1998](https://github.com/yann-morin-1998) helped to reduce the CMake requirement to version 3.1.
+159. [Konstantin Podsvirov](https://github.com/podsvirov) maintains a package for the MSYS2 software distro and fixed the MSYS2 package documentation.
+160. [remyabel](https://github.com/remyabel2) added GNUInstallDirs to the CMake files.
+161. [Taylor Howard](https://github.com/taylorhoward92) fixed a unit test.
+162. [Gabe Ron](https://github.com/Macr0Nerd) implemented the `to_string` method.
+163. [Watal M. Iwasaki](https://github.com/heavywatal) fixed a Clang warning.
+164. [Viktor Kirilov](https://github.com/onqtam) switched the unit tests from [Catch](https://github.com/philsquared/Catch) to [doctest](https://github.com/doctest/doctest)
+165. [Juncheng E](https://github.com/ejcjason) fixed a typo.
+166. [tete17](https://github.com/tete17) fixed a bug in the `contains` function.
+167. [Xav83](https://github.com/Xav83) fixed some cppcheck warnings.
+168. [0xflotus](https://github.com/0xflotus) fixed some typos.
+169. [Christian Deneke](https://github.com/chris0x44) added a const version of `json_pointer::back`.
+170. [Julien Hamaide](https://github.com/crazyjul) made the `items()` function work with custom string types.
+171. [Evan Nemerson](https://github.com/nemequ) updated fixed a bug in Hedley and updated this library accordingly.
+172. [Florian Pigorsch](https://github.com/flopp) fixed a lot of typos.
+173. [Camille Bégué](https://github.com/cbegue) fixed an issue in the conversion from  `std::pair` and `std::tuple` to `json`.
+174. [Anthony VH](https://github.com/AnthonyVH) fixed a compile error in an enum deserialization.
+175. [Yuriy Vountesmery](https://github.com/ua-code-dragon) noted a subtle bug in a preprocessor check.
+176. [Chen](https://github.com/dota17) fixed numerous issues in the library.
+177. [Antony Kellermann](https://github.com/aokellermann) added a CI step for GCC 10.1.
+178. [Alex](https://github.com/gistrec) fixed an MSVC warning.
+179. [Rainer](https://github.com/rvjr) proposed an improvement in the floating-point serialization in CBOR.
+180. [Francois Chabot](https://github.com/FrancoisChabot) made performance improvements in the input adapters.
+181. [Arthur Sonzogni](https://github.com/ArthurSonzogni) documented how the library can be included via `FetchContent`.
+182. [Rimas Misevičius](https://github.com/rmisev) fixed an error message.
+183. [Alexander Myasnikov](https://github.com/alexandermyasnikov) fixed some examples and a link in the README.
+184. [Hubert Chathi](https://github.com/uhoreg) made CMake's version config file architecture-independent.
+185. [OmnipotentEntity](https://github.com/OmnipotentEntity) implemented the binary values for CBOR, MessagePack, BSON, and UBJSON.
+186. [ArtemSarmini](https://github.com/ArtemSarmini) fixed a compilation issue with GCC 10 and fixed a leak.
+187. [Evgenii Sopov](https://github.com/sea5kg) integrated the library to the wsjcpp package manager.
+188. [Sergey Linev](https://github.com/linev) fixed a compiler warning.
+189. [Miguel Magalhães](https://github.com/magamig) fixed the year in the copyright.
+190. [Alexander “weej” Jones](https://github.com/alex-weej) fixed an example in the README.
+191. [Antoine Cœur](https://github.com/Coeur) fixed some typos in the documentation.
+192. [jothepro](https://github.com/jothepro) updated links to the Hunter package.
+193. [Dave Lee](https://github.com/kastiglione) fixed a link in the README.
+194. [Joël Lamotte](https://github.com/Klaim) added instruction for using Build2's package manager.
+195. [Paul Jurczak](https://github.com/pauljurczak) fixed an example in the README.
+196. [Carlos Gomes Martinho](https://github.com/gocarlos) updated the Conan package source.
+197. [Tridacnid](https://github.com/Tridacnid) improved the CMake tests.
+198. [Michael](https://github.com/MBalszun) fixed MSVC warnings.
+199. [Quentin Barbarat](https://github.com/quentin-dev) fixed an example in the documentation.
+200. [XyFreak](https://github.com/XyFreak) fixed a compiler warning.
+201. [TotalCaesar659](https://github.com/TotalCaesar659) fixed links in the README and updated the links in the documentation to use HTTPS.
+202. [Tanuj Garg](https://github.com/tanuj208) improved the fuzzer coverage for UBSAN input.
+203. [AODQ](https://github.com/AODQ) fixed a compiler warning.
+204. [jwittbrodt](https://github.com/jwittbrodt) made `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE` inline.
+205. [pfeatherstone](https://github.com/pfeatherstone) improved the upper bound of arguments of the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
+206. [Jan Procházka](https://github.com/jprochazk) fixed a bug in the CBOR parser for binary and string values.
+207. [T0b1-iOS](https://github.com/T0b1-iOS) fixed a bug in the new hash implementation.
+208. [Matthew Bauer](https://github.com/matthewbauer) adjusted the CBOR writer to create tags for binary subtypes.
+209. [gatopeich](https://github.com/gatopeich) implemented an ordered map container for `nlohmann::ordered_json`.
+210. [Érico Nogueira Rolim](https://github.com/ericonr) added support for pkg-config.
+211. [KonanM](https://github.com/KonanM) proposed an implementation for the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
+212. [Guillaume Racicot](https://github.com/gracicot) implemented `string_view` support and allowed C++20 support.
+213. [Alex Reinking](https://github.com/alexreinking) improved CMake support for `FetchContent`.
+214. [Hannes Domani](https://github.com/ssbssa) provided a GDB pretty printer.
+215. Lars Wirzenius reviewed the README file.
+216. [Jun Jie](https://github.com/ongjunjie) fixed a compiler path in the CMake scripts.
+217. [Ronak Buch](https://github.com/rbuch) fixed typos in the documentation.
+218. [Alexander Karzhenkov](https://github.com/karzhenkov) fixed a move constructor and the Travis builds.
+219. [Leonardo Lima](https://github.com/leozz37) added CPM.Cmake support.
+220. [Joseph Blackman](https://github.com/jbzdarkid) fixed a warning.
+221. [Yaroslav](https://github.com/YarikTH) updated doctest and implemented unit tests.
+222. [Martin Stump](https://github.com/globberwops) fixed a bug in the CMake files.
+223. [Jaakko Moisio](https://github.com/jasujm) fixed a bug in the input adapters.
+224. [bl-ue](https://github.com/bl-ue) fixed some Markdown issues in the README file.
+225. [William A. Wieselquist](https://github.com/wawiesel) fixed an example from the README.
+226. [abbaswasim](https://github.com/abbaswasim) fixed an example from the README.
+227. [Remy Jette](https://github.com/remyjette) fixed a warning.
+228. [Fraser](https://github.com/frasermarlow) fixed the documentation.
+229. [Ben Beasley](https://github.com/musicinmybrain) updated doctest.
+230. [Doron Behar](https://github.com/doronbehar) fixed pkg-config.pc.
+231. [raduteo](https://github.com/raduteo) fixed a warning.
+232. [David Pfahler](https://github.com/theShmoo) added the possibility to compile the library without I/O support.
+233. [Morten Fyhn Amundsen](https://github.com/mortenfyhn) fixed a typo.
+234. [jpl-mac](https://github.com/jpl-mac) allowed treating the library as a system header in CMake.
+235. [Jason Dsouza](https://github.com/jasmcaus) fixed the indentation of the CMake file.
+236. [offa](https://github.com/offa) added a link to Conan Center to the documentation.
+237. [Rafail Giavrimis](https://github.com/grafail) fixed the Google Benchmark default branch.
+238. [Louis Dionne](https://github.com/ldionne) fixed a conversion operator.
+239. [justanotheranonymoususer](https://github.com/justanotheranonymoususer) made the examples in the README more consistent.
+240. [Finkman](https://github.com/Finkman) suppressed some `-Wfloat-equal` warnings and fixed the debug pretty-printer.
+241. [Ferry Huberts](https://github.com/fhuberts) fixed `-Wswitch-enum` warnings and fixed a typo.
+242. [Arseniy Terekhin](https://github.com/senyai) made the GDB pretty-printer robust against unset variable names.
+243. [Amir Masoud Abdol](https://github.com/amirmasoudabdol) updated the Homebrew command as nlohmann/json is now in homebrew-core.
+244. [Hallot](https://github.com/Hallot) fixed some `-Wextra-semi-stmt warnings`.
+245. [Giovanni Cerretani](https://github.com/gcerretani) fixed `-Wunused` warnings on `JSON_DIAGNOSTICS` and fixed a check for `std::filesystem`.
+246. [Bogdan Popescu](https://github.com/Kapeli) hosts the [docset](https://github.com/Kapeli/Dash-User-Contributions/tree/master/docsets/JSON_for_Modern_C%2B%2B) for offline documentation viewers.
+247. [Carl Smedstad](https://github.com/carlsmedstad) fixed an assertion error when using `JSON_DIAGNOSTICS`.
+248. [miikka75](https://github.com/miikka75) provided an important fix to compile C++17 code with Clang 9.
+249. [Maarten Becker](https://github.com/kernie) fixed a warning for shadowed variables.
+250. [Cristi Vîjdea](https://github.com/axnsan12) fixed typos in the `operator[]` documentation.
+251. [Alex Beregszaszi](https://github.com/axic) fixed spelling mistakes in comments.
+252. [Dirk Stolle](https://github.com/striezel) fixed typos in the documentation.
+253. [Daniel Albuschat](https://github.com/daniel-kun) corrected the parameter name in the `parse` documentation.
+254. [Prince Mendiratta](https://github.com/Prince-Mendiratta) fixed a link to the FAQ.
+255. [Florian Albrechtskirchinger](https://github.com/falbrechtskirchinger) implemented `std::string_view` support for object keys and made dozens of other improvements.
+256. [Qianqian Fang](https://github.com/fangq) implemented the Binary JData (BJData) format.
+257. [pketelsen](https://github.com/pketelsen) added macros `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` and `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT`.
+258. [DarkZeros](https://github.com/DarkZeros) adjusted to code to not clash with Arduino defines.
+259. [flagarde](https://github.com/flagarde) fixed the output of `meta()` for MSVC.
+260. [Dimitris Apostolou](https://github.com/rex4539) fixed a typo.
+261. [Michael Nosthoff](https://github.com/heinemml) fixed a typo.
+262. [JungHoon Lee](https://github.com/jhnlee) fixed a typo.
+263. [Faruk D.](https://github.com/fdiblen) fixed the CITATION.CFF file.
+264. [Andrea Cocito](https://github.com/puffetto) added a clarification on macro usage to the documentation.
+265. [Krzysiek Karbowiak](https://github.com/kkarbowiak) refactored the tests to use `CHECK_THROWS_WITH_AS`.
+266. [Chaoqi Zhang](https://github.com/prncoprs) fixed a typo.
+267. [ivanovmp](https://github.com/ivanovmp) fixed a whitespace error.
+268. [KsaNL](https://github.com/KsaNL) fixed a build error when including `<windows.h>`.
+269. [Andrea Pappacoda](https://github.com/Tachi107) moved `.pc` and `.cmake` files to `share` directory.
+270. [Wolf Vollprecht](https://github.com/wolfv) added the `patch_inplace` function.
+271. [Jake Zimmerman](https://github.com/jez) highlighted common usage patterns in the README file.
+272. [NN](https://github.com/NN---) added the Visual Studio output directory to `.gitignore`.
+273. [Romain Reignier](https://github.com/romainreignier) improved the performance of the vector output adapter.
+274. [Mike](https://github.com/Mike-Leo-Smith) fixed the `std::iterator_traits`.
+275. [Richard Hozák](https://github.com/richardhozak) added macro `JSON_NO_ENUM` to disable default enum conversions.
+276. [vakokako](https://github.com/vakokako) fixed tests when compiling with C++20.
+277. [Alexander “weej” Jones](https://github.com/alexweej) fixed an example in the README.
+278. [Eli Schwartz](https://github.com/eli-schwartz) added more files to the `include.zip` archive.
+279. [Kevin Lu](https://github.com/kevinlul) fixed a compilation issue when typedefs with certain names were present.
+280. [Trevor Hickey](https://github.com/luxe) improved the description of an example.
+281. [Jef LeCompte](https://github.com/jef) updated the year in the README file.
+282. [Alexandre Hamez](https://github.com/ahamez) fixed a warning.
+283. [Maninderpal Badhan](https://github.com/mbadhan) fixed a typo.
+284. [kevin--](https://github.com/kevin--) added a note to an example in the README file.
+285. [I](https://github.com/wx257osn2) fixed a typo.
+286. [Gregorio Litenstein](https://github.com/Lord-Kamina) fixed the Clang detection.
+287. [Andreas Smas](https://github.com/andoma) added a Doozer badge.
+288. [WanCW](https://github.com/wancw) fixed the string conversion with Clang.
+289. [zhaohuaxishi](https://github.com/zhaohuaxishi) fixed a Doxygen error.
+290. [emvivre](https://github.com/emvivre) removed an invalid parameter from CMake.
+291. [Tobias Hermann](https://github.com/Dobiasd) fixed a link in the README file.
+292. [Michael](https://github.com/traits) fixed a warning.
+293. [Ryan Mulder](https://github.com/ryanjmulder) added `ensure_ascii` to the `dump` function.
+294. [Muri Nicanor](https://github.com/murinicanor) fixed the `sed` discovery in the Makefile.
+295. [David Avedissian](https://github.com/dgavedissian) implemented SFINAE-friendly `iterator_traits`.
+296. [AQNOUCH Mohammed](https://github.com/aqnouch) fixed a typo in the README.
+297. [Gareth Sylvester-Bradley](https://github.com/garethsb) added `operator/=` and `operator/` to construct JSON pointers.
+298. [Michael Macnair](https://github.com/mykter) added support for afl-fuzz testing.
+299. [Berkus Decker](https://github.com/berkus) fixed a typo in the README.
+300. [Illia Polishchuk](https://github.com/ilqvya) improved the CMake testing.
+301. [Ikko Ashimine](https://github.com/eltociear) fixed two typos.
+302. [Raphael Grimm](https://github.com/barcode) added the possibility to define a custom base class.
+303. [tocic](https://github.com/tocic) fixed typos in the documentation.
+304. [Vertexwahn](https://github.com/Vertexwahn) added Bazel build support.
+305. [DavidKorczynski](https://github.com/DavidKorczynski) added a CIFuzz CI GitHub action.
+306. [Florian Segginger](https://github.com/floriansegginger) bumped the years in the README.
+307. [haadfida](https://github.com/haadfida) cleaned up the badges of used services.
+308. [Arsen Arsenović](https://github.com/ArsenArsen) fixed a build error.
+309. [theevilone45](https://github.com/theevilone45) fixed a typo in a CMake file.
+310. [Sergei Trofimovich](https://github.com/trofi) fixed the custom allocator support.
+311. [Joyce](https://github.com/joycebrum) fixed some security issues in the GitHub workflows.
+312. [Nicolas Jakob](https://github.com/njakob) add vcpkg version badge.
+313. [Tomerkm](https://github.com/Tomerkm) added tests.
+314. [No.](https://github.com/tusooa) fixed the use of `get<>` calls.
+315. [taro](https://github.com/tarolling) fixed a typo in the `CODEOWNERS` file.
+316. [Felix Yan](https://github.com/felixonmars) fixed a typo in the README.
+317. [HO-COOH](https://github.com/HO-COOH) fixed a parenthesis in the documentation.
+318. [miny1233](https://github.com/miny1233) fixed a parenthesis in the documentation.
+319. [tomalakgeretkal](https://github.com/tomalakgeretkal) fixed a compilation error.
+320. [alferov](https://github.com/ALF-ONE) fixed a compilation error and fixed a version in the documentation.
+321. [Craig Scott](https://github.com/craigscott-crascit) fixed a deprecation warning in CMake.
+322. [Vyacheslav Zhdanovskiy](https://github.com/ZeronSix) added macros for serialization-only types.
+323. [Mathieu Westphal](https://github.com/mwestphal) fixed typos.
+324. [scribam](https://github.com/scribam) fixed the MinGW workflow.
+325. [Aleksei Sapitskii](https://github.com/aleksproger) added support for Apple's Swift Package Manager.
+326. [Benjamin Buch](https://github.com/bebuch) fixed the installation path in CMake.
+327. [Colby Haskell](https://github.com/colbychaskell) clarified the parse error message in case a file cannot be opened.
+328. [Juan Carlos Arevalo Baeza](https://github.com/TheJCAB) fixed the enum conversion.
+329. [ss](https://github.com/serge-s) fixed the amalgamation call.
+330. [AniketDhemare](https://github.com/AniketDhemare) fixed a version in the documentation.
+331. [Philip Müller](https://github.com/philip-paul-mueller) fixed an example.
+332. [Leila Shcheglova](https://github.com/LeilaShcheglova) fixed a warning in a test.
+333. [Alex Prabhat Bara](https://github.com/alexprabhat99) fixed a function name in the documentation.
+334. [laterlaugh](https://github.com/laterlaugh) fixed some typos.
+335. [Yuanhao Jia](https://github.com/MrJia1997) fixed the GDB pretty printer.
+336. [Fallen_Breath](https://github.com/Fallen-Breath) fixed an example for JSON Pointer.
+337. [Nikhil Idiculla](https://github.com/tsnl) fixed some typos.
+338. [Griffin Myers](https://github.com/gmyers18) updated the Natvis file.
+339. [thetimr](https://github.com/thetimr) fixed a typo in the documentation.
+340. [Balazs Erseki](https://github.com/zerocukor287) fixed a URL in the contribution guidelines.
+341. [Niccolò Iardella](https://github.com/rotolof) added `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
+342. [Borislav Stanimirov](https://github.com/iboB) allowed overriding the CMake target name.
+343. [Captain Crutches](https://github.com/captaincrutches) made `iterator_proxy_value` a `std::forward_iterator`.
+344. [Fredrik Sandhei](https://github.com/fsandhei) added type conversion support for `std::optional`.
+345. [jh96](https://github.com/jordan-hoang) added exceptions when `nullptr` is passed to `parse`.
+346. [Stuart Gorman](https://github.com/StuartGorman) fixed number parsing when `EINTR` set in `errno`.
+347. [Dylan Baker](https://github.com/dcbaker) generated a pkg-config file that follows the pkg-config conventions.
+348. [Tianyi Chen](https://github.com/TianyiChen) optimized the binary `get_number` implementation.
+349. [peng-wang-cn](https://github.com/peng-wang-cn) added type conversion support for multidimensional arrays.
+350. [Einars Netlis-Galejs](https://github.com/EinarsNG) added `ONLY_SERIALIZE` for `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
+351. [Marcel](https://github.com/mering) removed `alwayslink=True` Bazel flag.
+352. [Harinath Nampally](https://github.com/hnampally) added diagnostic positions to exceptions.
+353. [Nissim Armand Ben Danan](https://github.com/NissimBendanan) fixed `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` with an empty JSON instance.
+354. [Michael Valladolid](https://github.com/codenut) added support for BSON uint64 serialization/deserialization.
+355. [Nikhil](https://github.com/nikhilreddydev) updated the documentation.
+356. [Nebojša Cvetković](https://github.com/nebkat) added support for BJDATA optimized binary array type.
+357. [Sushrut Shringarputale](https://github.com/sushshring) added support for diagnostic positions. 
+358. [kimci86](https://github.com/kimci86) templated to `NLOHMANN_DEFINE_TYPE` macros to also support `ordered_json`.
+359. [Richard Topchii](https://github.com/richardtop) added support for VisionOS in the Swift Package Manager.
+360. [Robert Chisholm](https://github.com/Robadob) fixed a typo.
+361. [zjyhjqs](https://github.com/zjyhjqs) added CPack support.
+362. [bitFiedler](https://github.com/bitFiedler) made GDB pretty printer work with Python 3.8.
+363. [Gianfranco Costamagna](https://github.com/LocutusOfBorg) fixed a compiler warning.
+364. [risa2000](https://github.com/risa2000) made `std::filesystem::path` conversion to/from UTF-8 encoded string explicit.
+365. [AM](https://github.com/maqnouch) fixed typos in the README.
+366. [dmenendez-gruposantander](https://github.com/dmenendez-gruposantander) fixed typos in the comments of the examples.
+367. [Mihai Stan](https://github.com/mstan-xx) fixed comparisons against the literal `0`.
+368. [Matt Gumbel](https://github.com/intelmatt) fixed some `-Weffc++` warnings.
+369. [vimpunk](https://github.com/vimpunk) moved a lambda out of an unevaluated context to support older compilers.
+370. [Chris Harris](https://github.com/cjh1) fixed the compilation with GCC 4.8.
+371. [Palmer Dabbelt](https://github.com/palmer-dabbelt) generated and installed a pkg-config file.
+372. [Gus Pozuelo](https://github.com/ap-viavi) made `ordered_map` compatible with GCC 5.5, Clang 3.6, and Xcode 9.
+373. [AK](https://github.com/Lioncky) fixed an MSVC build error caused by the `min`/`max` macros from `windows.h`.
+374. [Sergiu Deitsch](https://github.com/sergiud) provided a fallback for missing `char8_t` support.
+375. [Xiaochuan Ye](https://github.com/XueSongTap) fixed `from_msgpack` for `std::byte` input by specializing `std::char_traits`.
+376. [Ville Vesilehto](https://github.com/thevilledev) fixed an overflow in the BJData size calculation and rejected overflowing negative integers in CBOR.
+377. [NmPassTHFan](https://github.com/nmpassthf) replaced the deprecated `std::is_trivial` for C++26.
+378. [Chris Ever](https://github.com/chirsz-ever) added the `ignore_trailing_commas` parser option.
+379. [Kuan-Fu Wu](https://github.com/kfwu1999) fixed the example code for `json_pointer` initialization.
+380. [David Kilzer](https://github.com/ddkilzer) added a missing header to the input adapters.
+381. [Miko](https://github.com/mikomikotaishi) added proper C++20 module support, simplified the module API, and fixed missing exports.
+382. [hitgirl](https://github.com/hitgil) fixed the CMake configuration when cross-compiling.
+383. [Devon Thomas](https://github.com/ThomaDevOSU) mentioned the Artistic Style formatting in the contribution guidelines.
+384. [Erik Hu](https://github.com/Erikhu1) made Coveralls upload errors non-fatal in the CI.
+385. [co63oc](https://github.com/co63oc) fixed typos.
+386. [DmitriBogdanov](https://github.com/DmitriBogdanov) fixed broken package manager links in the documentation.
+387. [Bander](https://github.com/banderzhm) improved the MSVC compatibility of the C++ modules.
+388. [Andy Choi](https://github.com/ccpong) removed an unnecessary `template` keyword before `get` in the README and the documentation.
+389. [SamareshSingh](https://github.com/ssam18) fixed single-element brace initialization to copy/move instead of wrapping in an array, fixed the `WITH_DEFAULT` macros for `ordered_map`, and handled moved events in `serve_header.py`.
+390. [Aditya](https://github.com/Lumowhisp) improved the documentation of the documentation generation.
+391. [cheese1](https://github.com/cheese1) clarified the README.
+392. [KhloodElhossiny](https://github.com/khloodelhossiny) enabled `std::string_view` keys in `operator[]`.
+393. [Charles Cabergs](https://github.com/cacharle) fixed a `-Wtautological-constant-out-of-range-compare` warning.
+394. [EALePain](https://github.com/EALePain) made the `std::tuple` conversion work with reference types such as `std::tie`.
+395. [koala_oishi](https://github.com/chibi-dogs) fixed grammatical wording in the README.
+396. [riccardoori11](https://github.com/riccardoori11) fixed a typo in the documentation.
+397. [Swastik Bose](https://github.com/VasuBhakt) fixed the parent pointers after `update()` with `JSON_DIAGNOSTICS` and fixed the Doxygen autolinking of requirements.
+398. [trdesilva](https://github.com/trdesilva) added `front`, `pop_front`, and `push_front` to `json_pointer`.
+399. [Akhilesh Arora](https://github.com/akhilesharora) fixed an incomplete-type error with `ordered_json`.
+400. [Hariom Phulre](https://github.com/hariomphulre) fixed the C++20 modules compilation with GCC.
+401. [Kirill Lokotkov](https://github.com/RUSLoker) fixed printing `long double` values.
+402. [George Sedov](https://github.com/radistmorse) added the `NLOHMANN_DEFINE_TYPE_*_WITH_NAMES` macros.
+403. [Caillin Nugent](https://github.com/nugentcaillin) added the `NLOHMANN_JSON_SERIALIZE_ENUM_STRICT` macro.
+404. [Cosmin D.](https://github.com/drcosmin) fixed `std::filesystem::path` conversions and added an MSVC workaround for `std::unique_ptr`.
+405. [Paul Dreik](https://github.com/pauldreik) fixed a test relying on implementation-specific behavior.
+406. [Daniel Falk](https://github.com/daniel-falk) added missing copyright notices to the SBOM.
+407. [Federico Sfriso](https://github.com/federicosfriso05-dotcom) added support for constructing JSON values from C++20 range views.
+408. [Luke Banicevic](https://github.com/banaboi) fixed corrupt BSON output for lengths exceeding `INT32_MAX`, cleaned up the BSON writer, and improved the documentation.
+409. [Patrick Armstrong](https://github.com/Patrick10199) updated the CBOR references and the half-precision float assertions.
+410. [Yash Bavadiya](https://github.com/xevrion) added checks to all BSON reads.
+411. [hum4nBeing](https://github.com/hum4nBeing) fixed the overflow handling of high-precision numbers in UBJSON.
+412. [tomatotomata](https://github.com/tomatotomata) added checks for reading CBOR tagged subtypes.
+413. [YingqiDuan](https://github.com/YingqiDuan) documented the BSON interoperability.
+414. [KBS](https://github.com/youdie006) documented the standards compliance and the strictness of `parse()` and `operator>>`.
+415. [Petr Bělohlávek](https://github.com/petrbel) added Clang 21 and 22 to the CI.
+416. [Dmitry Rantovov](https://github.com/darkdi) fixed the placement of a CBOR documentation block.
+417. [ljcjclljc](https://github.com/ljcjclljc) fixed the comparison of large unsigned integers with signed integers.
+418. [Sahil Kamate](https://github.com/sahilkamate03) fixed the handling of CBOR tags 0-5 and 21-23.
+419. [Krishnanand G](https://github.com/Krishnanand-G) made the UBJSON writer reject `use_type` without `use_size`.
+420. [whn](https://github.com/Whning0513) documented the lenient BSON input handling and corrected the complexity of `to_bson`.
+421. [elix3r](https://github.com/22elix3r) fixed `update()` with `merge_objects` when merging a primitive into an object.
+422. [Avionic Harshit](https://github.com/avionicharshit-byte) made `diff()` linear when an array shrinks.
+423. [Qatadaha Bin Matloob](https://github.com/qatcod) fixed comparisons between integers and floats and fixed unparsable BJData output.
+424. [Wu Shuwen](https://github.com/dajiaohuang) removed an unused include.
 
 Thanks a lot for helping out! Please [let me know](mailto:mail@nlohmann.me) if I forgot someone.
 
@@ -1879,21 +1850,28 @@ The library itself consists of a single header file licensed under the MIT licen
 - [**AppVeyor**](https://www.appveyor.com) for [continuous integration](https://ci.appveyor.com/project/nlohmann/json) on Windows
 - [**Artistic Style**](https://astyle.sourceforge.net) for automatic source code indentation
 - [**Clang**](https://clang.llvm.org) for compilation with code sanitizers
+- [**Clang-Tidy**](https://clang.llvm.org/extra/clang-tidy/) for static analysis and style checks
 - [**CMake**](https://cmake.org) for build automation
 - [**Codacy**](https://www.codacy.com) for further [code analysis](https://app.codacy.com/gh/nlohmann/json/dashboard)
+- [**CodeQL**](https://codeql.github.com) for code scanning
 - [**Coveralls**](https://coveralls.io) to measure [code coverage](https://coveralls.io/github/nlohmann/json)
 - [**Coverity Scan**](https://scan.coverity.com) for [static analysis](https://scan.coverity.com/projects/nlohmann-json)
 - [**cppcheck**](https://cppcheck.sourceforge.io) for static analysis
-- [**doctest**](https://github.com/onqtam/doctest) for the unit tests
-- [**GitHub Changelog Generator**](https://github.com/skywinder/github-changelog-generator) to generate the [ChangeLog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
+- [**cpplint**](https://github.com/cpplint/cpplint) for style checks
+- [**doctest**](https://github.com/doctest/doctest) for the unit tests
+- [**Flawfinder**](https://dwheeler.com/flawfinder/) for static analysis
+- [**GitHub Changelog Generator**](https://github.com/github-changelog-generator/github-changelog-generator) to generate the [ChangeLog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
 - [**Google Benchmark**](https://github.com/google/benchmark) to implement the benchmarks
 - [**Hedley**](https://nemequ.github.io/hedley/) to avoid re-inventing several compiler-agnostic feature macros
+- [**include-what-you-use**](https://include-what-you-use.org) to check the included headers
+- [**Infer**](https://fbinfer.com) for static analysis
 - [**lcov**](https://github.com/linux-test-project/lcov) to process coverage information and create an HTML view
 - [**libFuzzer**](https://llvm.org/docs/LibFuzzer.html) to implement fuzz testing for OSS-Fuzz
 - [**Material for MkDocs**](https://squidfunk.github.io/mkdocs-material/) for the style of the documentation site
 - [**MkDocs**](https://www.mkdocs.org) for the documentation site
 - [**OSS-Fuzz**](https://github.com/google/oss-fuzz) for continuous fuzz testing of the library ([project repository](https://github.com/google/oss-fuzz/tree/master/projects/json))
 - [**Probot**](https://probot.github.io) for automating maintainer tasks such as closing stale issues, requesting missing information, or detecting toxic comments.
+- [**Semgrep**](https://semgrep.dev) for static analysis
 - [**Valgrind**](https://valgrind.org) to check for correct memory management
 
 ## Notes
@@ -1987,10 +1965,10 @@ If the testdata is not found, several test suites will fail like this:
 
 ```
 ===============================================================================
-json/tests/src/make_test_data_available.hpp:21:
+json/tests/src/make_test_data_available.hpp:26:
 TEST CASE:  check test suite is downloaded
 
-json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::check_testsuite_downloaded() ) is NOT correct!
+json/tests/src/make_test_data_available.hpp:28: FATAL ERROR: REQUIRE( utils::check_testsuite_downloaded() ) is NOT correct!
   values: REQUIRE( false )
   logged: Test data not found in 'json/cmake-build-debug/json_test_data'.
           Please execute target 'download_test_data' before running this test suite.
@@ -2001,10 +1979,10 @@ json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::che
 
 In case you have downloaded the library rather than checked out the code via Git, test `cmake_fetch_content_configure` will fail. Please execute `ctest -LE git_required` to skip these tests. See [issue #2189](https://github.com/nlohmann/json/issues/2189) for more information.
 
-Some tests are requiring network to be properly execute. They are labeled as `git_required`. Please execute `ctest -LE git_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.
+Some tests require network access to execute properly. They are labeled as `git_required`. Please execute `ctest -LE git_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.
 
 Some tests change the installed files and hence make the whole process not reproducible. Please execute `ctest -LE not_reproducible` to skip these tests. See [issue #2324](https://github.com/nlohmann/json/issues/2324) for more information. Furthermore, assertions must be switched off to ensure reproducible builds (see [discussion 4494](https://github.com/nlohmann/json/discussions/4494)).
 
-Note you need to call `cmake -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.
+Note you need to call `ctest -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.
 
 As Intel compilers use unsafe floating point optimization by default, the unit tests may fail. Use flag [`/fp:precise`](https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-8/fp-model-fp.html) then.

REUSE.toml

@@ -10,10 +10,10 @@ SPDX-FileCopyrightText = "2013-2026 Niels Lohmann <https://nlohmann.me>"
 SPDX-License-Identifier = "MIT"
 
 [[annotations]]
-path = "include/nlohmann/thirdparty/hedley.hpp"
+path = "include/nlohmann/thirdparty/hedley/hedley.hpp"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2016-2021 Evan Nemerson <evan@nemerson.com>"
-SPDX-License-Identifier = "CC0"
+SPDX-License-Identifier = "CC0-1.0"
 
 [[annotations]]
 path = "include/nlohmann/detail/meta/cpp_future.hpp"
@@ -50,3 +50,9 @@ path = "tools/gdb_pretty_printer/**"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2020 Hannes Domani <https://github.com/ssbssa>"
 SPDX-License-Identifier = "MIT"
+
+[[annotations]]
+path = "docs/docset/icon*.png"
+precedence = "override"
+SPDX-FileCopyrightText = "JSON logo (public domain), https://commons.wikimedia.org/wiki/File:JSON_vector_logo.svg"
+SPDX-License-Identifier = "CC0-1.0"

cmake/ci.cmake

@@ -5,15 +5,14 @@ set(N 10)
 # Needed tools.
 ###############################################################################
 
-include(FindPython3)
 find_package(Python3 COMPONENTS Interpreter)
 
-find_program(CLANG_TOOL NAMES clang++-HEAD clang++ clang++-22 clang++-21 clang++-20 clang++-19 clang++-18 clang++-17 clang++-16 clang++-15 clang++-14 clang++-13 clang++-12 clang++-11 clang++)
+find_program(CLANG_TOOL NAMES clang++ clang++-HEAD clang++-22 clang++-21 clang++-20 clang++-19 clang++-18 clang++-17 clang++-16 clang++-15 clang++-14 clang++-13 clang++-12 clang++-11)
 execute_process(COMMAND ${CLANG_TOOL} --version OUTPUT_VARIABLE CLANG_TOOL_VERSION ERROR_VARIABLE CLANG_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TOOL_VERSION "${CLANG_TOOL_VERSION}")
 message(STATUS "🔖 Clang ${CLANG_TOOL_VERSION} (${CLANG_TOOL})")
 
-find_program(CLANG_TIDY_TOOL NAMES clang-tidy-22 clang-tidy-21 clang-tidy-20 clang-tidy-19 clang-tidy-18 clang-tidy-17 clang-tidy-16 clang-tidy-15 clang-tidy-14 clang-tidy-13 clang-tidy-12 clang-tidy-11 clang-tidy)
+find_program(CLANG_TIDY_TOOL NAMES clang-tidy clang-tidy-22 clang-tidy-21 clang-tidy-20 clang-tidy-19 clang-tidy-18 clang-tidy-17 clang-tidy-16 clang-tidy-15 clang-tidy-14 clang-tidy-13 clang-tidy-12 clang-tidy-11)
 execute_process(COMMAND ${CLANG_TIDY_TOOL} --version OUTPUT_VARIABLE CLANG_TIDY_TOOL_VERSION ERROR_VARIABLE CLANG_TIDY_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TIDY_TOOL_VERSION "${CLANG_TIDY_TOOL_VERSION}")
 message(STATUS "🔖 Clang-Tidy ${CLANG_TIDY_TOOL_VERSION} (${CLANG_TIDY_TOOL})")
@@ -69,9 +68,7 @@ string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" VALGRIND_TOOL_VERSION "${VALGRIND_TOOL_V
 message(STATUS "🔖 Valgrind ${VALGRIND_TOOL_VERSION} (${VALGRIND_TOOL})")
 
 find_program(GENHTML_TOOL NAMES genhtml)
-find_program(PLOG_CONVERTER_TOOL NAMES plog-converter)
-find_program(PVS_STUDIO_ANALYZER_TOOL NAMES pvs-studio-analyzer)
-find_program(SCAN_BUILD_TOOL NAMES scan-build-15 scan-build-14 scan-build-13 scan-build-12 scan-build-11 scan-build)
+find_program(SCAN_BUILD_TOOL NAMES scan-build scan-build-22 scan-build-21 scan-build-20 scan-build-19 scan-build-18 scan-build-17 scan-build-16 scan-build-15 scan-build-14 scan-build-13 scan-build-12 scan-build-11)
 
 # the individual source files
 file(GLOB_RECURSE SRC_FILES ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp)
@@ -367,7 +364,7 @@ add_custom_target(ci_test_coverage
     COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused
     COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused
     COMMAND ${CMAKE_SOURCE_DIR}/tests/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
-    COMMAND genhtml --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage json.info.filtered.noexcept
+    COMMAND ${GENHTML_TOOL} --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage json.info.filtered.noexcept
 
     COMMENT "Compile and test with coverage"
 )
@@ -392,8 +389,8 @@ add_custom_target(ci_test_clang_sanitizer
 # Check if header is amalgamated and sources are properly indented.
 ###############################################################################
 
-# Same file set as .github/workflows/check_amalgamation.yml, so a direct push to develop/master/release/*
-# (which only this CMake target checks, not the pull_request-only workflow) is held to the same standard.
+# Same file set as .github/workflows/check_amalgamation.yml, so this CMake target (which can be run locally) is held
+# to the same standard as the workflow (which runs for pull requests and for pushes to develop/master/release/*).
 file(GLOB_RECURSE INDENT_FILES
     ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.hpp
     ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.cpp
@@ -423,7 +420,7 @@ add_custom_target(ci_test_amalgamation
     COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json.json -s .
     COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_fwd.json -s .
     COMMAND cp ${PROJECT_SOURCE_DIR}/include/nlohmann/json_literals.hpp ${include_dir}/json_literals.hpp
-    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp
+    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp ${include_dir}/json_literals.hpp
     COMMAND ${CMAKE_COMMAND} -P ${PROJECT_SOURCE_DIR}/cmake/scripts/gen_bazel_build_file.cmake
 
     COMMAND diff ${include_dir}/json.hpp~ ${include_dir}/json.hpp
@@ -434,6 +431,8 @@ add_custom_target(ci_test_amalgamation
     COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=orig ${INDENT_FILES}
     COMMAND for FILE in `find . -name '*.orig'`\; do false \; done
 
+    COMMAND rm -f ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~ ${include_dir}/json_literals.hpp~ ${PROJECT_SOURCE_DIR}/BUILD.bazel~
+
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
     COMMENT "Check amalgamation, formatting, and BUILD.bazel"
 )
@@ -719,7 +718,7 @@ ci_get_cmake(4.0.0  CMAKE_4_0_0_BINARY)
 
 # the tests require CMake 3.13 or later, so they are excluded for CMake 3.5.0
 set(JSON_CMAKE_FLAGS_3_5_0 JSON_Diagnostics JSON_Diagnostic_Positions JSON_GlobalUDLs JSON_ImplicitConversions JSON_DisableEnumSerialization
-    JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
+    JSON_DisableTupleReferenceConversion JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
     JSON_StrictNulHandling JSON_StrictBinaryUTF8 JSON_DeleteDeprecatedFunctions)
 set(JSON_CMAKE_FLAGS_3_31_6 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})
 set(JSON_CMAKE_FLAGS_4_0_0 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})
@@ -776,17 +775,14 @@ add_custom_target(ci_cmake_flags
 # Use more installed compilers.
 ###############################################################################
 
-foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6 g++-7 g++-8 g++-9 g++-10 g++-11 clang++-3.5 clang++-3.6 clang++-3.7 clang++-3.8 clang++-3.9 clang++-4.0 clang++-5.0 clang++-6.0 clang++-7 clang++-8 clang++-9 clang++-10 clang++-11 clang++-12 clang++-13 clang++-14 clang++-15 clang++-16 clang++-17 clang++-18 clang++-19 clang++-20)
+foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6)
     find_program(COMPILER_TOOL NAMES ${COMPILER})
     if (COMPILER_TOOL)
-        unset(ADDITIONAL_FLAGS)
-
         add_custom_target(ci_test_compiler_${COMPILER}
             COMMAND CXX=${COMPILER} ${CMAKE_COMMAND}
                 -DCMAKE_BUILD_TYPE=Debug -GNinja
                 -DJSON_BuildTests=ON -DJSON_FastTests=ON
                 -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
-                ${ADDITIONAL_FLAGS}
             COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
             COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
             COMMENT "Compile and test with ${COMPILER}"
@@ -800,7 +796,6 @@ add_custom_target(ci_test_compiler_default
         -DCMAKE_BUILD_TYPE=Debug -GNinja
         -DJSON_BuildTests=ON -DJSON_FastTests=ON
         -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_default
-        ${ADDITIONAL_FLAGS}
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_default --parallel ${N}
     COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_default && ${CMAKE_CTEST_COMMAND} --parallel ${N} -LE git_required --output-on-failure
     COMMENT "Compile and test with default C++ compiler"
@@ -823,10 +818,12 @@ add_custom_target(ci_cuda_example
 
 add_custom_target(ci_module_cpp20
     COMMAND ${CMAKE_COMMAND}
-        -DCMAKE_BUILD_TYPE=Debug -GNinja 
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
         -DJSON_CI=ON -DNLOHMANN_JSON_BUILD_MODULES=ON -DJSON_Install=ON
+        "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
         -S${PROJECT_SOURCE_DIR}/tests/module_cpp20 -B${PROJECT_BINARY_DIR}/ci_module_cpp20
     COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/ci_module_cpp20
+    VERBATIM
 )
 
 ###############################################################################

cmake/scripts/gen_bazel_build_file.cmake

@@ -49,6 +49,7 @@ cc_library(
     hdrs = [
         "single_include/nlohmann/json.hpp",
         "single_include/nlohmann/json_fwd.hpp",
+        "single_include/nlohmann/json_literals.hpp",
     ],
     includes = ["single_include"],
     visibility = ["//visibility:public"],

docs/README.md

@@ -7,12 +7,12 @@ This URL provides the most recent documentation and also applies to previous ver
 functions is not removed; instead, it is marked as deprecated.
 
 If you want to view the documentation for a specific tag or commit hash, you can generate it locally as follows (example
-using tag `v3.10.2`):
+using tag `v3.12.0`):
 
 ```shell
 git clone https://github.com/nlohmann/json.git
 cd json
-git checkout v3.10.2
+git checkout v3.12.0
 make install_venv serve -C docs/mkdocs
 ```
 

docs/docset/Makefile

@@ -1,48 +1,24 @@
 SHELL=/usr/bin/env bash
-SED ?= $(shell which gsed 2>/dev/null || which sed)
-
-MKDOCS_PAGES=$(shell cd ../mkdocs/docs/ && find * -type f -name '*.md' | sort)
+PYTHON=../mkdocs/venv/bin/python3
 
 .PHONY: all
 all: JSON_for_Modern_C++.tgz
 
-docSet.dsidx: docSet.sql
-	# generate index
-	sqlite3 docSet.dsidx <docSet.sql
+# generate the search index (the docset target does this itself, this is
+# only handy for inspecting the index)
+docSet.dsidx: generate_docset.py
+	$(PYTHON) generate_docset.py index docSet.dsidx
 
-JSON_for_Modern_C++.docset: Info.plist docSet.dsidx
-	rm -fr JSON_for_Modern_C++.docset JSON_for_Modern_C++.tgz
-	mkdir -p JSON_for_Modern_C++.docset/Contents/Resources/Documents/
-	cp icon*.png JSON_for_Modern_C++.docset
-	cp Info.plist JSON_for_Modern_C++.docset/Contents
-	# build and copy documentation
+# build the documentation and turn it into a self-contained docset
+.PHONY: JSON_for_Modern_C++.docset
+JSON_for_Modern_C++.docset:
 	$(MAKE) install_venv -C ../mkdocs
 	$(MAKE) build -C ../mkdocs
-	cp -r ../mkdocs/site/* JSON_for_Modern_C++.docset/Contents/Resources/Documents
-	# patch CSS to hide navigation items
-	echo -e "\n\nheader, footer, nav.md-tabs, nav.md-tabs--active, div.md-sidebar--primary, a.md-content__button { display: none; }" >> "$$(ls JSON_for_Modern_C++.docset/Contents/Resources/Documents/assets/stylesheets/main.*.min.css)"
-	# fix spacing
-	echo -e "\n\ndiv.md-sidebar div.md-sidebar--secondary, div.md-main__inner { top: 0; margin-top: 0 }" >> "$$(ls JSON_for_Modern_C++.docset/Contents/Resources/Documents/assets/stylesheets/main.*.min.css)"
-	# remove "JSON for Modern C++" from page titles (fallback)
-	find JSON_for_Modern_C++.docset/Contents/Resources/Documents -type f -exec $(SED) -i 's| - JSON for Modern C++</title>|</title>|' {} +
-	# replace page titles with name from index, if available
-	for page in $(MKDOCS_PAGES); do \
-		case "$$page" in \
-			*/index.md) path=$${page/\/index.md/} ;; \
-			*)          path=$${page/.md/}        ;; \
-		esac; \
-		title=$$(sqlite3 docSet.dsidx "SELECT name FROM searchIndex WHERE path='$$path/index.html'" | tr '\n' ',' | $(SED) -e 's/,/, /g' -e 's/, $$/\n/'); \
-		if [ "x$$title" != "x" ]; then \
-			$(SED) -i "s%<title>.*</title>%<title>$$title</title>%" "JSON_for_Modern_C++.docset/Contents/Resources/Documents/$$path/index.html"; \
-		fi \
-	done
-	# clean up
-	rm JSON_for_Modern_C++.docset/Contents/Resources/Documents/sitemap.*
-	# copy index
-	cp docSet.dsidx JSON_for_Modern_C++.docset/Contents/Resources/
+	$(PYTHON) generate_docset.py docset ../mkdocs/site .
 
+.PHONY: JSON_for_Modern_C++.tgz
 JSON_for_Modern_C++.tgz: JSON_for_Modern_C++.docset
-	tar --exclude='.DS_Store' -cvzf JSON_for_Modern_C++.tgz JSON_for_Modern_C++.docset
+	$(PYTHON) generate_docset.py tgz .
 
 # install docset for Zeal documentation browser (https://zealdocs.org/)
 .PHONY: install_docset_zeal
@@ -52,26 +28,6 @@ install_docset_zeal: JSON_for_Modern_C++.docset
 	mkdir -p $$docset_root; \
 	cp -r JSON_for_Modern_C++.docset $$docset_root/
 
-# both targets below compare the docset search index with the mkdocs page
-# set. They share the same normalization (docs/foo/index.md and
-# docs/foo.md both become foo/index.html, the URL mkdocs itself would
-# give the page; the top-level index.md is excluded, as it is not part
-# of the hand-curated docSet.sql) and use comm(1) on two sorted lists
-# instead of running a sqlite3 query, or an O(n*m) nested shell loop,
-# once per page.
-DOCSET_INDEX_PATHS=$(shell sqlite3 docSet.dsidx "SELECT DISTINCT path FROM searchIndex" | sort)
-DOCSET_PAGE_PATHS=$(shell echo '$(MKDOCS_PAGES)' | tr ' ' '\n' | grep -v '^index\.md$$' | $(SED) -E 's@/index\.md$$@/index.html@; s@\.md$$@/index.html@' | sort)
-
-# list mkdocs pages missing from the docset index
-.PHONY: list_missing_pages
-list_missing_pages: docSet.dsidx
-	@comm -23 <(echo '$(DOCSET_PAGE_PATHS)' | tr ' ' '\n') <(echo '$(DOCSET_INDEX_PATHS)' | tr ' ' '\n')
-
-# list paths in the docset index without a corresponding mkdocs page
-.PHONY: list_removed_paths
-list_removed_paths: docSet.dsidx
-	@comm -13 <(echo '$(DOCSET_PAGE_PATHS)' | tr ' ' '\n') <(echo '$(DOCSET_INDEX_PATHS)' | tr ' ' '\n')
-
 .PHONY: clean
 clean:
 	rm -f docSet.dsidx

docs/docset/README.md

@@ -4,7 +4,8 @@ The folder contains the required files to create a [docset](https://kapeli.com/d
 documentation browsers like [Dash](https://kapeli.com/dash), [Velocity](https://velocity.silverlakesoftware.com), or
 [Zeal](https://zealdocs.org).
 
-The docset can be created with
+The docset (pages and search index) is generated by `generate_docset.py` from the mkdocs site and `mkdocs.yml`. It
+can be created with
 
 ```sh
 make JSON_for_Modern_C++.docset
@@ -12,6 +13,7 @@ make JSON_for_Modern_C++.docset
 
 The generated folder `JSON_for_Modern_C++.docset` can then be opened in the documentation browser. `make all` builds a
 `JSON_for_Modern_C++.tgz` archive instead, and `make install_docset_zeal` installs the docset for Zeal directly.
+`make docSet.dsidx` builds only the search index.
 
 A recent version is also part of the [Dash user contributions](https://github.com/Kapeli/Dash-User-Contributions/tree/master/docsets/JSON_for_Modern_C%2B%2B).
 

docs/docset/docSet.sql

@@ -1,289 +0,0 @@
-DROP TABLE IF EXISTS searchIndex;
-CREATE TABLE searchIndex(id INTEGER PRIMARY KEY, name TEXT, type TEXT, path TEXT);
-CREATE UNIQUE INDEX anchor ON searchIndex (name, type, path);
-
--- API
-INSERT INTO searchIndex(name, type, path) VALUES ('adl_serializer', 'Class', 'api/adl_serializer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('adl_serializer::from_json', 'Function', 'api/adl_serializer/from_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('adl_serializer::to_json', 'Function', 'api/adl_serializer/to_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype', 'Class', 'api/byte_container_with_subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::byte_container_with_subtype', 'Constructor', 'api/byte_container_with_subtype/byte_container_with_subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::clear_subtype', 'Method', 'api/byte_container_with_subtype/clear_subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::has_subtype', 'Method', 'api/byte_container_with_subtype/has_subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::operator!=', 'Operator', 'api/byte_container_with_subtype/operator_ne/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::operator==', 'Operator', 'api/byte_container_with_subtype/operator_eq/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::set_subtype', 'Method', 'api/byte_container_with_subtype/set_subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('byte_container_with_subtype::subtype', 'Method', 'api/byte_container_with_subtype/subtype/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json', 'Class', 'api/basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('format_as', 'Function', 'api/basic_json/format_as/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::accept', 'Function', 'api/basic_json/accept/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::array', 'Function', 'api/basic_json/array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::array_t', 'Type', 'api/basic_json/array_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::as_base_class', 'Method', 'api/basic_json/as_base_class/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::at', 'Method', 'api/basic_json/at/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::back', 'Method', 'api/basic_json/back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::basic_json', 'Constructor', 'api/basic_json/basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::begin', 'Method', 'api/basic_json/begin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::binary', 'Function', 'api/basic_json/binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::binary_t', 'Type', 'api/basic_json/binary_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::boolean_t', 'Type', 'api/basic_json/boolean_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::cbegin', 'Method', 'api/basic_json/cbegin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::cbor_tag_handler_t', 'Enum', 'api/basic_json/cbor_tag_handler_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::cend', 'Method', 'api/basic_json/cend/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::clear', 'Method', 'api/basic_json/clear/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::contains', 'Method', 'api/basic_json/contains/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::count', 'Method', 'api/basic_json/count/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::crbegin', 'Method', 'api/basic_json/crbegin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::crend', 'Method', 'api/basic_json/crend/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::default_object_comparator_t', 'Type', 'api/basic_json/default_object_comparator_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::diff', 'Function', 'api/basic_json/diff/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::dump', 'Method', 'api/basic_json/dump/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::emplace', 'Method', 'api/basic_json/emplace/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::emplace_back', 'Method', 'api/basic_json/emplace_back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::empty', 'Method', 'api/basic_json/empty/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::end', 'Method', 'api/basic_json/end/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::end_pos', 'Method', 'api/basic_json/end_pos/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::erase', 'Method', 'api/basic_json/erase/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::error_handler_t', 'Enum', 'api/basic_json/error_handler_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::exception', 'Class', 'api/basic_json/exception/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::find', 'Method', 'api/basic_json/find/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::flatten', 'Method', 'api/basic_json/flatten/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bjdata', 'Function', 'api/basic_json/from_bjdata/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bson', 'Function', 'api/basic_json/from_bson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_cbor', 'Function', 'api/basic_json/from_cbor/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_msgpack', 'Function', 'api/basic_json/from_msgpack/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_bon8', 'Function', 'api/basic_json/from_bon8/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::from_ubjson', 'Function', 'api/basic_json/from_ubjson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::front', 'Method', 'api/basic_json/front/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get', 'Method', 'api/basic_json/get/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get_allocator', 'Function', 'api/basic_json/get_allocator/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get_binary', 'Method', 'api/basic_json/get_binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get_ptr', 'Method', 'api/basic_json/get_ptr/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get_ref', 'Method', 'api/basic_json/get_ref/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::get_to', 'Method', 'api/basic_json/get_to/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::input_format_t', 'Enum', 'api/basic_json/input_format_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::insert', 'Method', 'api/basic_json/insert/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::invalid_iterator', 'Class', 'api/basic_json/invalid_iterator/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_array', 'Method', 'api/basic_json/is_array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_binary', 'Method', 'api/basic_json/is_binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_boolean', 'Method', 'api/basic_json/is_boolean/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_discarded', 'Method', 'api/basic_json/is_discarded/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_null', 'Method', 'api/basic_json/is_null/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_number', 'Method', 'api/basic_json/is_number/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_number_float', 'Method', 'api/basic_json/is_number_float/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_number_integer', 'Method', 'api/basic_json/is_number_integer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_number_unsigned', 'Method', 'api/basic_json/is_number_unsigned/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_object', 'Method', 'api/basic_json/is_object/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_primitive', 'Method', 'api/basic_json/is_primitive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_string', 'Method', 'api/basic_json/is_string/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::is_structured', 'Method', 'api/basic_json/is_structured/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::items', 'Method', 'api/basic_json/items/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::json_base_class_t', 'Type', 'api/basic_json/json_base_class_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::json_serializer', 'Class', 'api/basic_json/json_serializer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::max_size', 'Method', 'api/basic_json/max_size/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::merge_patch', 'Method', 'api/basic_json/merge_patch/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::meta', 'Function', 'api/basic_json/meta/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::number_float_t', 'Type', 'api/basic_json/number_float_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::number_integer_t', 'Type', 'api/basic_json/number_integer_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::number_unsigned_t', 'Type', 'api/basic_json/number_unsigned_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::object', 'Function', 'api/basic_json/object/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::object_comparator_t', 'Type', 'api/basic_json/object_comparator_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::object_t', 'Type', 'api/basic_json/object_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator ValueType', 'Operator', 'api/basic_json/operator_ValueType/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator value_t', 'Operator', 'api/basic_json/operator_value_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator[]', 'Operator', 'api/basic_json/operator[]/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator=', 'Operator', 'api/basic_json/operator=/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator+=', 'Operator', 'api/basic_json/operator+=/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator==', 'Operator', 'api/basic_json/operator_eq/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator!=', 'Operator', 'api/basic_json/operator_ne/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator<', 'Operator', 'api/basic_json/operator_lt/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator<=', 'Operator', 'api/basic_json/operator_le/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator>', 'Operator', 'api/basic_json/operator_gt/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator>=', 'Operator', 'api/basic_json/operator_ge/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::operator<=>', 'Operator', 'api/basic_json/operator_spaceship/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::out_of_range', 'Class', 'api/basic_json/out_of_range/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::other_error', 'Class', 'api/basic_json/other_error/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::parse', 'Function', 'api/basic_json/parse/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::parse_error', 'Class', 'api/basic_json/parse_error/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::parse_event_t', 'Enum', 'api/basic_json/parse_event_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::parser_callback_t', 'Type', 'api/basic_json/parser_callback_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::patch', 'Method', 'api/basic_json/patch/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::patch_inplace', 'Method', 'api/basic_json/patch_inplace/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::push_back', 'Method', 'api/basic_json/push_back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::rbegin', 'Method', 'api/basic_json/rbegin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::rend', 'Method', 'api/basic_json/rend/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::sax_parse', 'Function', 'api/basic_json/sax_parse/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::size', 'Method', 'api/basic_json/size/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::start_pos', 'Method', 'api/basic_json/start_pos/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::string_t', 'Type', 'api/basic_json/string_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::swap', 'Method', 'api/basic_json/swap/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::type', 'Method', 'api/basic_json/type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::type_error', 'Class', 'api/basic_json/type_error/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::type_name', 'Method', 'api/basic_json/type_name/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::unflatten', 'Method', 'api/basic_json/unflatten/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::update', 'Method', 'api/basic_json/update/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bjdata', 'Function', 'api/basic_json/to_bjdata/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bson', 'Function', 'api/basic_json/to_bson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_cbor', 'Function', 'api/basic_json/to_cbor/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_msgpack', 'Function', 'api/basic_json/to_msgpack/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_bon8', 'Function', 'api/basic_json/to_bon8/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_string', 'Method', 'api/basic_json/to_string/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_ubjson', 'Function', 'api/basic_json/to_ubjson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::value', 'Method', 'api/basic_json/value/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::value_t', 'Enum', 'api/basic_json/value_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::with_t', 'Type', 'api/basic_json/with_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::~basic_json', 'Method', 'api/basic_json/~basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json', 'Class', 'api/json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer', 'Class', 'api/json_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::back', 'Method', 'api/json_pointer/back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::empty', 'Method', 'api/json_pointer/empty/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::front', 'Method', 'api/json_pointer/front/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::json_pointer', 'Constructor', 'api/json_pointer/json_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator==', 'Operator', 'api/json_pointer/operator_eq/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator!=', 'Operator', 'api/json_pointer/operator_ne/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator/', 'Operator', 'api/json_pointer/operator_slash/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator/=', 'Operator', 'api/json_pointer/operator_slasheq/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator string_t', 'Operator', 'api/json_pointer/operator_string_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::operator<=>', 'Operator', 'api/json_pointer/operator_spaceship/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::parent_pointer', 'Method', 'api/json_pointer/parent_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::pop_back', 'Method', 'api/json_pointer/pop_back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::pop_front', 'Method', 'api/json_pointer/pop_front/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::push_back', 'Method', 'api/json_pointer/push_back/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::push_front', 'Method', 'api/json_pointer/push_front/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::string_t', 'Type', 'api/json_pointer/string_t/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::to_string', 'Method', 'api/json_pointer/to_string/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax', 'Class', 'api/json_sax/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::binary', 'Method', 'api/json_sax/binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::boolean', 'Method', 'api/json_sax/boolean/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::end_array', 'Method', 'api/json_sax/end_array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::end_object', 'Method', 'api/json_sax/end_object/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::key', 'Method', 'api/json_sax/key/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::null', 'Method', 'api/json_sax/null/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::number_float', 'Method', 'api/json_sax/number_float/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::number_integer', 'Method', 'api/json_sax/number_integer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::number_unsigned', 'Method', 'api/json_sax/number_unsigned/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::parse_error', 'Method', 'api/json_sax/parse_error/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::start_array', 'Method', 'api/json_sax/start_array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::start_object', 'Method', 'api/json_sax/start_object/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_sax::string', 'Method', 'api/json_sax/string/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('operator""_json', 'Literal', 'api/operator_literal_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('operator""_json_pointer', 'Literal', 'api/operator_literal_json_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('operator<<', 'Operator', 'api/operator_ltlt/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('operator>>', 'Operator', 'api/operator_gtgt/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('ordered_json', 'Class', 'api/ordered_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('ordered_map', 'Class', 'api/ordered_map/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('std::formatter<basic_json>', 'Class', 'api/basic_json/std_formatter/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('std::hash<basic_json>', 'Class', 'api/basic_json/std_hash/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('std::swap<basic_json>', 'Function', 'api/basic_json/std_swap/index.html');
-
--- Features
-INSERT INTO searchIndex(name, type, path) VALUES ('Arbitrary Type Conversions', 'Guide', 'features/arbitrary_types/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats', 'Guide', 'features/binary_formats/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BJData', 'Guide', 'features/binary_formats/bjdata/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BSON', 'Guide', 'features/binary_formats/bson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: CBOR', 'Guide', 'features/binary_formats/cbor/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: MessagePack', 'Guide', 'features/binary_formats/messagepack/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: BON8', 'Guide', 'features/binary_formats/bon8/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Formats: UBJSON', 'Guide', 'features/binary_formats/ubjson/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Binary Values', 'Guide', 'features/binary_values/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Comments', 'Guide', 'features/comments/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Element Access', 'Guide', 'features/element_access/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Element Access: Access with default value: value', 'Guide', 'features/element_access/default_value/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Element Access: Checked access: at', 'Guide', 'features/element_access/checked_access/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Element Access: Unchecked access: operator[]', 'Guide', 'features/element_access/unchecked_access/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Exceptions', 'Guide', 'home/exceptions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Integration: Migration Guide', 'Guide', 'integration/migration_guide/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Integration: CMake', 'Guide', 'integration/cmake/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Integration: Header only', 'Guide', 'integration/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Integration: Package Managers', 'Guide', 'integration/package_managers/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Integration: Pkg-config', 'Guide', 'integration/pkg-config/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Iterators', 'Guide', 'features/iterators/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON Merge Patch', 'Guide', 'features/merge_patch/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON Patch and Diff', 'Guide', 'features/json_patch/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON Pointer', 'Guide', 'features/json_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('nlohmann Namespace', 'Guide', 'features/namespace/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Types', 'Guide', 'features/types/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Types: Number Handling', 'Guide', 'features/types/number_handling/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Object Order', 'Guide', 'features/object_order/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Performance', 'Guide', 'features/performance/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing', 'Guide', 'features/parsing/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing: JSON Lines', 'Guide', 'features/parsing/json_lines/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing: Parser Callbacks', 'Guide', 'features/parsing/parser_callbacks/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing: Parsing and Exceptions', 'Guide', 'features/parsing/parse_exceptions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing: SAX Interface', 'Guide', 'features/parsing/sax_interface/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Parsing: Untrusted Input', 'Guide', 'features/parsing/untrusted_input/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Runtime Assertions', 'Guide', 'features/assertions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Specializing enum conversion', 'Guide', 'features/enum_conversion/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Supported Macros', 'Guide', 'features/macros/index.html');
-
--- Macros
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_ASSERT', 'Macro', 'api/macros/json_assert/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_BRACE_INIT_COPY_SEMANTICS', 'Macro', 'api/macros/json_brace_init_copy_semantics/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_CATCH_USER', 'Macro', 'api/macros/json_throw_user/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DELETE_DEPRECATED_FUNCTIONS', 'Macro', 'api/macros/json_delete_deprecated_functions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DIAGNOSTICS', 'Macro', 'api/macros/json_diagnostics/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DIAGNOSTIC_POSITIONS', 'Macro', 'api/macros/json_diagnostic_positions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DISABLE_ENUM_SERIALIZATION', 'Macro', 'api/macros/json_disable_enum_serialization/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DISABLE_TUPLE_REFERENCE_CONVERSION', 'Macro', 'api/macros/json_disable_tuple_reference_conversion/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_11', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_14', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_17', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_20', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_23', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_CPP_26', 'Macro', 'api/macros/json_has_cpp_11/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_EXPERIMENTAL_FILESYSTEM', 'Macro', 'api/macros/json_has_filesystem/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_FILESYSTEM', 'Macro', 'api/macros/json_has_filesystem/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_RANGES', 'Macro', 'api/macros/json_has_ranges/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_STATIC_RTTI', 'Macro', 'api/macros/json_has_static_rtti/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_STD_FORMAT', 'Macro', 'api/macros/json_has_std_format/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_HAS_THREE_WAY_COMPARISON', 'Macro', 'api/macros/json_has_three_way_comparison/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_NOEXCEPTION', 'Macro', 'api/macros/json_noexception/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_NO_AUTOMATIC_UDLS', 'Macro', 'api/macros/json_no_automatic_udls/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_NO_IO', 'Macro', 'api/macros/json_no_io/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_NO_THREAD_LOCAL', 'Macro', 'api/macros/json_no_thread_local/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_PRECISE_STREAM_POSITION', 'Macro', 'api/macros/json_precise_stream_position/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_SKIP_LIBRARY_VERSION_CHECK', 'Macro', 'api/macros/json_skip_library_version_check/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_SKIP_UNSUPPORTED_COMPILER_CHECK', 'Macro', 'api/macros/json_skip_unsupported_compiler_check/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_STRICT_BINARY_UTF8', 'Macro', 'api/macros/json_strict_binary_utf8/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_STRICT_NUL_HANDLING', 'Macro', 'api/macros/json_strict_nul_handling/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_THROW_USER', 'Macro', 'api/macros/json_throw_user/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_TRY_USER', 'Macro', 'api/macros/json_throw_user/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_GLOBAL_UDLS', 'Macro', 'api/macros/json_use_global_udls/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_IMPLICIT_CONVERSIONS', 'Macro', 'api/macros/json_use_implicit_conversions/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON', 'Macro', 'api/macros/json_use_legacy_discarded_value_comparison/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS', 'Macro', 'api/macros/json_use_objects_for_enum_keyed_maps/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_SIMDUTF', 'Macro', 'api/macros/json_use_simdutf/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Macros', 'Macro', 'api/macros/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE', 'Macro', 'api/macros/nlohmann_define_type_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE', 'Macro', 'api/macros/nlohmann_define_type_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT', 'Macro', 'api/macros/nlohmann_define_type_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE', 'Macro', 'api/macros/nlohmann_define_type_non_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE', 'Macro', 'api/macros/nlohmann_define_type_non_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT', 'Macro', 'api/macros/nlohmann_define_type_non_intrusive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES', 'Macro', 'api/macros/nlohmann_define_type_with_names/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_NAMESPACE', 'Macro', 'api/macros/nlohmann_json_namespace/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_NAMESPACE_BEGIN', 'Macro', 'api/macros/nlohmann_json_namespace_begin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_NAMESPACE_END', 'Macro', 'api/macros/nlohmann_json_namespace_begin/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_NAMESPACE_NO_VERSION', 'Macro', 'api/macros/nlohmann_json_namespace_no_version/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_SERIALIZE_ENUM', 'Macro', 'api/macros/nlohmann_json_serialize_enum/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_SERIALIZE_ENUM_STRICT', 'Macro', 'api/macros/nlohmann_json_serialize_enum_strict/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_VERSION_MAJOR', 'Macro', 'api/macros/nlohmann_json_version_major/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_VERSION_MINOR', 'Macro', 'api/macros/nlohmann_json_version_major/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_JSON_VERSION_PATCH', 'Macro', 'api/macros/nlohmann_json_version_major/index.html');

docs/docset/generate_docset.py

@@ -0,0 +1,528 @@
+#!/usr/bin/env python3
+
+"""Generate the Dash docset search index from the mkdocs sources."""
+
+import argparse
+import glob
+import hashlib
+import html
+import os
+import re
+import shutil
+import sqlite3
+import sys
+import tarfile
+import urllib.parse
+import urllib.request
+
+import yaml
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+MKDOCS_YML = os.path.join(HERE, '..', 'mkdocs', 'mkdocs.yml')
+PAGES = os.path.join(HERE, '..', 'mkdocs', 'docs')
+
+# api pages whose (name, type) cannot be derived by the heuristics
+OVERRIDES = {
+}
+
+DOCSET = 'JSON_for_Modern_C++.docset'
+TITLE_SUFFIX = ' - JSON for Modern C++</title>'
+
+# CSS rules appended to the stylesheet: hide navigation items and fix spacing
+# hide the navigation (the documentation browser has its own); Material's class selectors would win over element
+# selectors, hence the classes and !important
+CSS_PATCH = (
+    '\n\n.md-header, .md-footer, .md-tabs, .md-sidebar--primary, .md-content__button { display: none !important; }'
+    '\n\n.md-sidebar--secondary, .md-main__inner { top: 0 !important; margin-top: 0 !important; }'
+)
+
+USER_AGENT = ('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 '
+              '(KHTML, like Gecko) Chrome/124.0 Safari/537.36')
+CONTENT_TYPE_EXT = {'image/svg+xml': '.svg', 'image/png': '.png', 'image/jpeg': '.jpg',
+                    'image/gif': '.gif', 'image/webp': '.webp'}
+
+# remote loads that are allowed to remain (URL -> reason)
+ALLOWED_REMOTE = {
+    # Material only loads this polyfill if the browser has no ResizeObserver
+    'https://unpkg.com/resize-observer-polyfill': 'fallback for browsers without ResizeObserver',
+}
+
+problems = []
+
+
+def problem(page, reason) -> None:
+    """Record a problem; all problems are reported at the end."""
+    problems.append(f'generate_docset.py: {page}: {reason}')
+
+
+class Loader(yaml.SafeLoader):
+    """YAML loader that tolerates the custom tags used in mkdocs.yml."""
+
+
+Loader.add_multi_constructor('', lambda loader, suffix, node: None)
+
+
+def walk_nav(items, groups=()):
+    """Yield (group titles, nav title or None, md path) for all nav leaves."""
+    for item in items:
+        if isinstance(item, str):
+            yield list(groups), None, item
+        elif isinstance(item, dict):
+            for title, value in item.items():
+                if isinstance(value, list):
+                    yield from walk_nav(value, groups + (str(title),))
+                else:
+                    yield list(groups), str(title), value
+
+
+def page_path(md_path) -> str:
+    """Map a markdown path to the HTML path of the rendered page."""
+    if md_path.endswith('/index.md'):
+        return md_path[:-len('index.md')] + 'index.html'
+    return md_path[:-len('.md')] + '/index.html'
+
+
+def read_page(md_path) -> str:
+    """Read a page (resolving a snippet include), return '' if it does not exist."""
+    try:
+        with open(os.path.join(PAGES, md_path), encoding='utf-8') as f:
+            text = f.read()
+        m = re.match(r'--8<-- "(.+)"\s*$', text)
+        if m:
+            with open(os.path.join(PAGES, m.group(1)), encoding='utf-8') as f:
+                text = f.read()
+        return text
+    except OSError:
+        return ''
+
+
+def clean(text) -> str:
+    """Strip tags and entities from a heading and normalize whitespace."""
+    text = text.replace('\\>', '\x00')  # escaped '>' is not the end of a tag
+    text = html.unescape(re.sub(r'</?[a-zA-Z][^>]*>', '', text)).replace('\x00', '>')
+    return re.sub(r'\s+', ' ', text).strip()
+
+
+def strip_fences(text) -> str:
+    """Remove fenced code blocks (their lines may start with '# ')."""
+    return re.sub(r'^(```|~~~).*?^\1[^\n]*$', '', text, flags=re.M | re.S)
+
+
+def get_h1(text):
+    """Return the cleaned first H1 of a page or None."""
+    body = strip_fences(text)
+    m = re.search(r'^# (.+)$', body, flags=re.M)
+    if m:
+        return clean(m.group(1))
+    m = re.search(r'<h1>(.*?)</h1>', body, flags=re.S)
+    return clean(m.group(1)) if m else None
+
+
+def split_top_level(text, seps=','):
+    """Split at separators that are not nested in <>, () or []."""
+    parts, depth, current = [], 0, ''
+    for c in text:
+        if c in '<([':
+            depth += 1
+        elif c in '>)]':
+            depth -= 1
+        if c in seps and depth <= 0:
+            parts.append(current)
+            current = ''
+        else:
+            current += c
+    parts.append(current)
+    return [p.strip() for p in parts if p.strip()]
+
+
+OPERATOR_SYMBOLS = ('<=>', '<<', '>>', '<=', '>=', '<', '>')
+
+
+def api_names(h1) -> list:
+    """Derive the entry names from the H1 of an api page."""
+    # hide the angle brackets of operators from the nesting detection
+    for i, sym in enumerate(OPERATOR_SYMBOLS):
+        h1 = h1.replace('operator' + sym, f'operator\x01{i}\x01')
+    names = []
+    for part in split_top_level(h1):
+        name = part.replace('\\', '').replace('nlohmann::', '')
+        name = re.sub(r'\x01(\d)\x01', lambda m: OPERATOR_SYMBOLS[int(m.group(1))], name)
+        # drop qualifiers like "operator<<(basic_json)", but keep "operator()"
+        if not name.endswith('operator()'):
+            name = re.sub(r'(?<=\w|[<>=!+\-*/\[\]])\([^()]*\)$', '', name)
+        if name not in names:
+            names.append(name)
+    return names
+
+
+def first_cpp_block(text):
+    """Return the first ```cpp block following the H1."""
+    m = re.search(r'^# .*?^```cpp\n(.*?)^```', text, flags=re.M | re.S)
+    return m.group(1) if m else None
+
+
+def api_type(name, decl):
+    """Determine the Dash entry type from name and declaration."""
+    parts = name.split('::')
+    last = parts[-1]
+    if name.startswith('operator""'):
+        return 'Literal'
+    if last.startswith('operator'):
+        return 'Operator'
+    if decl is None:
+        return None
+    if re.search(r'\benum\b', decl):
+        return 'Enum'
+    if re.search(r'^\s*(template\s*<.*>\s*)?(class|struct)\s+\w+\s*(final\b|[:{;<]|$)', decl, flags=re.M):
+        return 'Class'
+    if re.search(r'\busing\s+\w+\s*=', decl) or 'typedef' in decl:
+        return 'Type'
+    if len(parts) > 1 and last == parts[-2]:
+        return 'Constructor'
+    if last.startswith('~'):
+        return 'Method'
+    if re.search(r'\bstatic\b', decl) or len(parts) == 1 or parts[0] == 'std':
+        return 'Function'
+    return 'Method'
+
+
+def macro_names(h1) -> list:
+    """Split the H1 of a macro page into macro names."""
+    return [n.strip() for n in re.split(r'[,/]', h1) if n.strip()]
+
+
+def api_entries(md_path):
+    """Return the (name, type) pairs of an api page."""
+    if md_path in OVERRIDES:
+        return OVERRIDES[md_path]
+    if md_path == 'api/macros/index.md':
+        return [('Macros', 'Macro')]
+    text = read_page(md_path)
+    h1 = get_h1(text)
+    if not h1:
+        problem(md_path, 'no H1 found')
+        return []
+    if md_path.startswith('api/macros/'):
+        return [(n, 'Macro') for n in macro_names(h1)]
+    names = api_names(h1)
+    if not names:
+        problem(md_path, 'no names found')
+        return []
+    decl = first_cpp_block(text)
+    result = []
+    for name in names:
+        kind = api_type(name, decl)
+        if kind is None:
+            problem(md_path, f'no type determinable for {name}')
+        else:
+            result.append((name, kind))
+    return result
+
+
+def guide_entries(nav):
+    """Yield (name, type, md path) for all non-api nav pages."""
+    for groups, title, md_path in walk_nav(nav):
+        if md_path.startswith('api/') or md_path == 'index.md':
+            continue
+        if not md_path.endswith('.md'):
+            continue
+        groups = groups[1:]  # drop the top-level tab
+        if title is None:
+            title = get_h1(read_page(md_path))
+            if not title:
+                problem(md_path, 'no title found')
+                continue
+        # "Parsing: Parsing Untrusted Input" -> "Parsing: Untrusted Input"
+        if groups and title.startswith(groups[-1] + ' ') and title[len(groups[-1]) + 1:][:1].isupper():
+            title = title[len(groups[-1]) + 1:]
+        if md_path.endswith('/index.md') and groups and title == groups[-1]:
+            name = ': '.join(groups)
+        else:
+            name = ': '.join(groups + [title])
+        yield name, 'Guide', md_path
+
+
+def build_entries() -> list:
+    """Return the sorted list of (name, type, path) index entries."""
+    nav = load_mkdocs_yml()['nav']
+
+    entries = set()
+    for name, kind, md_path in guide_entries(nav):
+        entries.add((name, kind, page_path(md_path)))
+
+    api_root = os.path.join(PAGES, 'api')
+    on_disk = set()
+    for root, _, files in os.walk(api_root):
+        for file in files:
+            if file.endswith('.md'):
+                rel = os.path.relpath(os.path.join(root, file), PAGES)
+                on_disk.add(rel.replace(os.sep, '/'))
+    for _, _, md_path in walk_nav(nav):
+        if md_path.startswith('api/') and md_path not in on_disk:
+            problem(md_path, 'listed in nav but missing on disk')
+    for md_path in sorted(on_disk):
+        for name, kind in api_entries(md_path):
+            entries.add((name, kind, page_path(md_path)))
+    return sorted(entries)
+
+
+def write_index(entries, out) -> None:
+    """Write the entries into a SQLite search index."""
+    if os.path.exists(out):
+        os.remove(out)
+    con = sqlite3.connect(out)
+    con.execute('CREATE TABLE searchIndex(id INTEGER PRIMARY KEY, name TEXT, type TEXT, path TEXT)')
+    con.execute('CREATE UNIQUE INDEX anchor ON searchIndex (name, type, path)')
+    con.executemany('INSERT INTO searchIndex(name, type, path) VALUES (?, ?, ?)', entries)
+    con.commit()
+    con.close()
+
+
+def html_files(root):
+    """Yield all HTML files below root."""
+    for base, _, files in os.walk(root):
+        for file in files:
+            if file.endswith('.html'):
+                yield os.path.join(base, file)
+
+
+def read(path) -> str:
+    with open(path, encoding='utf-8') as f:
+        return f.read()
+
+
+def write(path, text) -> None:
+    with open(path, 'w', encoding='utf-8') as f:
+        f.write(text)
+
+
+def remove_source_widget(docs) -> None:
+    """Drop data-md-component=source so Material does not query api.github.com for the stars and version."""
+    pattern = re.compile(r'\sdata-md-component=(?:"source"|source\b)')
+    for path in html_files(docs):
+        text = read(path)
+        new = pattern.sub('', text)
+        if new != text:
+            write(path, new)
+
+
+def patch_titles(docs, entries) -> None:
+    """Strip the site name from all titles; use the index names where available."""
+    names = {}
+    for name, _, path in entries:
+        names.setdefault(path, []).append(name)
+    for file in html_files(docs):
+        rel = os.path.relpath(file, docs).replace(os.sep, '/')
+        text = read(file).replace(TITLE_SUFFIX, '</title>')
+        if rel in names:
+            title = html.escape(', '.join(names[rel]), quote=False)
+            text = re.sub(r'<title>.*?</title>', lambda _: f'<title>{title}</title>', text, count=1, flags=re.S)
+        write(file, text)
+
+
+IMG_RE = re.compile(r'<img\b[^>]*>', re.I)
+ATTR_RE = r'''(?:{0})\s*=\s*(?:"([^"]*)"|'([^']*)'|([^\s"'>]+))'''
+
+
+def attr(tag, name):
+    """Return the value of an attribute in a tag or None."""
+    m = re.search(r'(?<![\w-])' + ATTR_RE.format(name), tag, flags=re.I)
+    return next(g for g in m.groups() if g is not None) if m else None
+
+
+def is_remote(url) -> bool:
+    return re.match(r'(https?:)?//', url.strip(), flags=re.I) is not None
+
+
+def download(url, docs) -> str:
+    """Download url into assets/external and return the path relative to docs."""
+    u = urllib.parse.urlparse(url if not url.startswith('//') else 'https:' + url)
+    req = urllib.request.Request(u.geturl(), headers={'User-Agent': USER_AGENT})
+    with urllib.request.urlopen(req, timeout=20) as r:
+        data = r.read()
+        ctype = r.headers.get_content_type()
+    path = urllib.parse.unquote(u.path).lstrip('/')
+    ext = os.path.splitext(path)[1]
+    if u.query or not ext or path.endswith('/'):
+        digest = hashlib.sha1(url.encode()).hexdigest()[:12]
+        path = os.path.join(os.path.dirname(path), digest + CONTENT_TYPE_EXT.get(ctype, ext or '.bin'))
+    rel = os.path.normpath(os.path.join('assets', 'external', u.hostname, path))
+    out = os.path.join(docs, rel)
+    os.makedirs(os.path.dirname(out), exist_ok=True)
+    with open(out, 'wb') as f:
+        f.write(data)
+    return rel.replace(os.sep, '/')
+
+
+def localize_images(docs) -> None:
+    """Download remote images and rewrite their src; drop them on failure."""
+    cache = {}
+    for file in html_files(docs):
+        text = read(file)
+
+        def repl(m):
+            tag = m.group(0)
+            src = attr(tag, 'src')
+            if src is None or not is_remote(src):
+                return tag
+            if src not in cache:
+                try:
+                    cache[src] = download(src, docs)
+                except Exception as e:  # noqa: BLE001
+                    print(f'generate_docset.py: warning: cannot download {src}: {e}', file=sys.stderr)
+                    cache[src] = None
+            if cache[src] is None:
+                return attr(tag, 'alt') or ''
+            local = os.path.relpath(os.path.join(docs, cache[src]), os.path.dirname(file))
+            local = local.replace(os.sep, '/')
+            return re.sub(ATTR_RE.format('src'), lambda _: f'src="{local}"', tag, count=1, flags=re.I)
+
+        new = IMG_RE.sub(repl, text)
+        if new != text:
+            write(file, new)
+
+
+def load_mkdocs_yml() -> dict:
+    """Load mkdocs.yml, ignoring tags like !ENV and !!python/name."""
+    with open(MKDOCS_YML, encoding='utf-8') as f:
+        return yaml.load(f, Loader=Loader)
+
+
+def localize_site_urls(docs, site_url) -> None:
+    """Load assets that the theme's JavaScript references by absolute site URL from the docset.
+
+    The privacy plugin rewrites the mermaid loader to "<site_url>assets/external/unpkg.com/mermaid@11/...", so the
+    docset would fetch mermaid from the live site. __md_scope is the site root that Material defines in every page.
+    """
+    pattern = re.compile(r'"' + re.escape(site_url) + r'(assets/[^"]*)"')
+    for base, _, files in os.walk(docs):
+        for file in (f for f in files if f.endswith('.js')):
+            path = os.path.join(base, file)
+            text = read(path)
+            new = pattern.sub(r'new URL("\1",__md_scope).href', text)
+            if new != text:
+                write(path, new)
+
+
+def remote_loads(docs, site_url) -> list:
+    """Return 'file: url' strings for resources that would be loaded remotely."""
+    found = []
+    cdn = re.compile(r'https://(?:unpkg\.com|cdn\.jsdelivr\.net|cdnjs\.cloudflare\.com|'
+                     r'fonts\.googleapis\.com|fonts\.gstatic\.com)/[^\s"\'`)\\]*')
+    css_url = re.compile(r'url\(\s*["\']?((?:https?:)?//[^)"\']+)', re.I)
+    css_import = re.compile(r'@import\s+(?:url\(\s*)?["\']?((?:https?:)?//[^)"\'; ]+)', re.I)
+    for base, _, files in os.walk(docs):
+        for file in files:
+            path = os.path.join(base, file)
+            rel = os.path.relpath(path, docs)
+            urls = []
+            if file.endswith('.html'):
+                text = read(path)
+                for m in re.finditer(r'<[a-zA-Z][^>]*>', text):
+                    tag = m.group(0)
+                    for name in ('src', 'poster'):
+                        v = attr(tag, name)
+                        if v and is_remote(v):
+                            urls.append(v)
+                    v = attr(tag, 'srcset')
+                    if v:
+                        urls += [c.split()[0] for c in v.split(',') if c.strip() and is_remote(c.strip())]
+                    if re.match(r'<link\b', tag, flags=re.I):
+                        rel_attr = (attr(tag, 'rel') or '').lower()
+                        v = attr(tag, 'href')
+                        if v and is_remote(v) and re.search(r'stylesheet|icon|preload|modulepreload|manifest', rel_attr):
+                            urls.append(v)
+                urls += css_url.findall(text) + css_import.findall(text)
+            elif file.endswith('.css'):
+                text = read(path)
+                urls += css_url.findall(text) + css_import.findall(text)
+            elif file.endswith('.js'):
+                text = read(path)
+                urls += cdn.findall(text)
+                urls += re.findall(re.escape(site_url) + r'assets/[^\s"\'`)\\]*', text)
+            found += [f'{rel}: {u}' for u in urls if u not in ALLOWED_REMOTE]
+    return found
+
+
+def make_docset(site, out_dir) -> int:
+    entries = build_entries()
+    if problems:
+        print('\n'.join(problems), file=sys.stderr)
+        return 1
+    docset = os.path.join(out_dir, DOCSET)
+    docs = os.path.join(docset, 'Contents', 'Resources', 'Documents')
+    if os.path.exists(docset):
+        shutil.rmtree(docset)
+    shutil.copytree(site, docs)
+    for icon in ('icon.png', 'icon@2x.png'):
+        shutil.copy(os.path.join(HERE, icon), docset)
+    shutil.copy(os.path.join(HERE, 'Info.plist'), os.path.join(docset, 'Contents'))
+    write_index(entries, os.path.join(docset, 'Contents', 'Resources', 'docSet.dsidx'))
+
+    # patch CSS to hide navigation items and fix spacing
+    css = glob.glob(os.path.join(docs, 'assets', 'stylesheets', 'main.*.min.css'))
+    if len(css) != 1:
+        print(f'generate_docset.py: expected exactly one main.*.min.css, found {len(css)}', file=sys.stderr)
+        return 1
+    with open(css[0], 'a', encoding='utf-8') as f:
+        f.write(CSS_PATCH)
+
+    patch_titles(docs, entries)
+    remove_source_widget(docs)
+    for sitemap in glob.glob(os.path.join(docs, 'sitemap.*')):
+        os.remove(sitemap)
+
+    # make the docset self-contained
+    site_url = load_mkdocs_yml()['site_url']
+    localize_images(docs)
+    localize_site_urls(docs, site_url)
+    remote = remote_loads(docs, site_url)
+    if remote:
+        print('generate_docset.py: remote resources remain in the docset:', file=sys.stderr)
+        print('\n'.join('  ' + r for r in remote), file=sys.stderr)
+        return 1
+    return 0
+
+
+def make_tgz(out_dir) -> int:
+    docset = os.path.join(out_dir, DOCSET)
+    if not os.path.isdir(docset):
+        print(f'generate_docset.py: {docset} does not exist', file=sys.stderr)
+        return 1
+    with tarfile.open(os.path.join(out_dir, 'JSON_for_Modern_C++.tgz'), 'w:gz') as tar:
+        tar.add(docset, arcname=DOCSET, filter=lambda i: None if os.path.basename(i.name) == '.DS_Store' else i)
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    sub = parser.add_subparsers(dest='command', required=True)
+    sub.add_parser('list', help='print the index entries as TSV')
+    p = sub.add_parser('index', help='write the SQLite search index')
+    p.add_argument('out')
+    p = sub.add_parser('docset', help='build the docset from a built mkdocs site')
+    p.add_argument('site_dir')
+    p.add_argument('out_dir')
+    p = sub.add_parser('tgz', help='pack the docset into a tarball')
+    p.add_argument('out_dir')
+    args = parser.parse_args()
+
+    if args.command == 'docset':
+        return make_docset(args.site_dir, args.out_dir)
+    if args.command == 'tgz':
+        return make_tgz(args.out_dir)
+
+    entries = build_entries()
+    if problems:
+        print('\n'.join(problems), file=sys.stderr)
+        return 1
+    if args.command == 'list':
+        for entry in entries:
+            print('\t'.join(entry))
+    elif args.command == 'index':
+        write_index(entries, args.out)
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())

docs/mkdocs/Makefile

@@ -17,6 +17,7 @@ build: style_check
 
 style_check:
 	@cd docs ; ../venv/bin/python3 ../scripts/check_structure.py
+	@venv/bin/python3 ../docset/generate_docset.py list > /dev/null
 
 # check that all Mermaid diagrams parse (needs Node.js)
 # This target is used in the CI (ci_test_documentation_mermaid).

docs/mkdocs/docs/api/basic_json/binary_t.md

@@ -64,18 +64,7 @@ values of that type directly to a `basic_json` instance, and they will automatic
 rather than arrays:
 
 ```cpp
-using custom_json = nlohmann::basic_json<
-    nlohmann::ordered_map,  // ObjectType
-    std::vector,            // ArrayType
-    std::string,            // StringType
-    bool,                   // BooleanType
-    std::int64_t,           // NumberIntegerType
-    std::uint64_t,          // NumberUnsignedType
-    double,                 // NumberFloatType
-    std::allocator,         // AllocatorType
-    nlohmann::adl_serializer,
-    std::vector<std::byte>  // Custom BinaryType
->;
+using custom_json = nlohmann::ordered_json::with_binary_t<std::vector<std::byte>>;
 
 std::vector<std::byte> data{std::byte{1}, std::byte{2}, std::byte{3}};
 custom_json j = data;  // Creates a binary value, not an array

docs/mkdocs/docs/api/basic_json/contains.md

@@ -10,6 +10,10 @@ bool contains(KeyType&& key) const;
 
 // (3)
 bool contains(const json_pointer& ptr) const;
+
+// (4)
+template<typename T>
+bool contains(T) const = delete;
 ```
 
 1. Check whether an element exists in a JSON object with a key equivalent to `key`. If the element is not found or the 
@@ -17,6 +21,9 @@ bool contains(const json_pointer& ptr) const;
 2. See 1. This overload is only available if `KeyType` is comparable with `#!cpp typename object_t::key_type` and
    `#!cpp typename object_comparator_t::is_transparent` denotes a type.
 3. Check whether the given JSON pointer `ptr` can be resolved in the current JSON value.
+4. Deleted: this overload is only available if `T` is an integral type and is declared as deleted, so that a call with
+   an integer `key` (for example, `#!cpp j.contains(0)`) fails to compile. Otherwise, the integer literal `0` would convert to
+   a null `#!cpp const char*` and, from there, to the key type, causing undefined behavior at runtime.
 
 ## Template parameters
 
@@ -39,6 +46,7 @@ bool contains(const json_pointer& ptr) const;
    is not an object, `#!cpp false` is returned.
 2. See 1.
 3. `#!cpp true` if the JSON pointer can be resolved to a stored value, `#!cpp false` otherwise.
+4. Deleted; a call with an integral argument does not compile.
 
 ## Exception safety
 
@@ -49,6 +57,7 @@ Strong exception safety: if an exception occurs, the original value stays intact
 1. The function does not throw exceptions.
 2. The function does not throw exceptions.
 3. The function does not throw exceptions.
+4. Deleted; a call with an integral argument does not compile.
 
 ## Complexity
 

docs/mkdocs/docs/api/basic_json/count.md

@@ -7,12 +7,19 @@ size_type count(const typename object_t::key_type& key) const;
 // (2)
 template<typename KeyType>
 size_type count(KeyType&& key) const;
+
+// (3)
+template<typename T>
+size_type count(T) const = delete;
 ```
 
 1. Returns the number of elements with key `key`. If `ObjectType` is the default `std::map` type, the return value will
    always be `0` (`key` was not found) or `1` (`key` was found).
 2. See 1. This overload is only available if `KeyType` is comparable with `#!cpp typename object_t::key_type` and
    `#!cpp typename object_comparator_t::is_transparent` denotes a type.
+3. Deleted: this overload is only available if `T` is an integral type and is declared as deleted, so that a call with
+   an integer `key` (for example, `#!cpp j.count(0)`) fails to compile. Otherwise, the integer literal `0` would convert to
+   a null `#!cpp const char*` and, from there, to the key type, causing undefined behavior at runtime.
 
 ## Template parameters
 

docs/mkdocs/docs/api/basic_json/error_handler_t.md

@@ -37,8 +37,8 @@ ignore
 :   ignore invalid UTF-8 sequences; all valid bytes are copied to the output unchanged, and invalid bytes are dropped
 
 keep
-:   keep invalid UTF-8 sequences unchanged; only meaningful for the binary formats mentioned above, since [`dump`]
-    (dump.md) itself must produce text, and `keep` there writes the ill-formed bytes to the output as is, so the
+:   keep invalid UTF-8 sequences unchanged; only meaningful for the binary formats mentioned above, since
+    [`dump`](dump.md) itself must produce text, and `keep` there writes the ill-formed bytes to the output as is, so the
     result is then not valid UTF-8 (but still equals the input bytes exactly, including around any well-formed
     characters, which are still escaped as usual)
 

docs/mkdocs/docs/api/basic_json/find.md

@@ -10,12 +10,21 @@ template<typename KeyType>
 iterator find(KeyType&& key);
 template<typename KeyType>
 const_iterator find(KeyType&& key) const;
+
+// (3)
+template<typename T>
+iterator find(T) = delete;
+template<typename T>
+const_iterator find(T) const = delete;
 ```
 
 1. Finds an element in a JSON object with a key equivalent to `key`. If the element is not found or the
    JSON value is not an object, `end()` is returned.
 2. See 1. This overload is only available if `KeyType` is comparable with `#!cpp typename object_t::key_type` and
    `#!cpp typename object_comparator_t::is_transparent` denotes a type.
+3. Deleted: this overload is only available if `T` is an integral type and is declared as deleted, so that a call with
+   an integer `key` (for example, `#!cpp j.find(0)`) fails to compile. Otherwise, the integer literal `0` would convert to
+   a null `#!cpp const char*` and, from there, to the key type, causing undefined behavior at runtime.
 
 ## Template parameters
 

docs/mkdocs/docs/api/basic_json/from_bjdata.md

@@ -124,7 +124,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_bjdata` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.13.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_bjdata(ptr, len, ...);` with `#!cpp from_bjdata(ptr, ptr+len, ...);`.
 
     You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated

docs/mkdocs/docs/api/basic_json/from_bon8.md

@@ -110,7 +110,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_bon8` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.13.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_bon8(ptr, len, ...);` with `#!cpp from_bon8(ptr, ptr+len, ...);`.
 
     You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated

docs/mkdocs/docs/api/basic_json/from_bson.md

@@ -126,7 +126,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_bson` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.8.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_bson(ptr, len, ...);` with `#!cpp from_bson(ptr, ptr+len, ...);`.
     - Overload (2) replaces calls to `from_bson` with a pair of iterators as their first parameter, which has been
       deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like

docs/mkdocs/docs/api/basic_json/from_cbor.md

@@ -135,7 +135,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_cbor` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.8.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_cbor(ptr, len, ...);` with `#!cpp from_cbor(ptr, ptr+len, ...);`.
     - Overload (2) replaces calls to `from_cbor` with a pair of iterators as their first parameter, which has been
       deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like

docs/mkdocs/docs/api/basic_json/from_msgpack.md

@@ -127,7 +127,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_msgpack` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.8.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_msgpack(ptr, len, ...);` with `#!cpp from_msgpack(ptr, ptr+len, ...);`.
     - Overload (2) replaces calls to `from_msgpack` with a pair of iterators as their first parameter, which has been
       deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like

docs/mkdocs/docs/api/basic_json/from_ubjson.md

@@ -125,7 +125,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"
 
     - Overload (2) replaces calls to `from_ubjson` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.8.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
       `#!cpp from_ubjson(ptr, len, ...);` with `#!cpp from_ubjson(ptr, ptr+len, ...);`.
     - Overload (2) replaces calls to `from_ubjson` with a pair of iterators as their first parameter, which has been
       deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like

docs/mkdocs/docs/api/basic_json/json_base_class_t.md

@@ -62,5 +62,5 @@ same name. Hidden members remain accessible via [`as_base_class`](as_base_class.
 
 ## Version history
 
-- Added in version 3.12.0.
+- Added in version 3.11.3.
 - Made a public member type in version 3.13.0; it was private before, so it could not be named outside the class.

docs/mkdocs/docs/api/basic_json/object_t.md

@@ -26,7 +26,8 @@ To store objects in C++, a type is defined by the template parameters described
 
 `StringType`
 :   the type of the keys or names (e.g., `std::string`). The comparison function `std::less<StringType>` is used to
-    order elements inside the container.
+    order elements inside the container. `object_t::key_type` must be implicitly convertible to `string_t` (required by the
+    binary formats).
 
 `AllocatorType`
 :   the allocator to use for objects (e.g., `std::allocator`)

docs/mkdocs/docs/api/macros/index.md

@@ -27,6 +27,7 @@ header. See also the [macro overview page](../../features/macros.md).
 
 - [**JSON_HAS_CPP_11**<br>**JSON_HAS_CPP_14**<br>**JSON_HAS_CPP_17**<br>**JSON_HAS_CPP_20**](json_has_cpp_11.md) - set supported C++ standard
 - [**JSON_HAS_FILESYSTEM**<br>**JSON_HAS_EXPERIMENTAL_FILESYSTEM**](json_has_filesystem.md) - control `std::filesystem` support
+- [**JSON_HAS_RANGE_VIEW_CONVERSION**](json_has_range_view_conversion.md) - control construction from `std::ranges` views
 - [**JSON_HAS_RANGES**](json_has_ranges.md) - control `std::ranges` support
 - [**JSON_HAS_STATIC_RTTI**](json_has_static_rtti.md) - control RTTI (run time type information) support
 - [**JSON_HAS_STD_FORMAT**](json_has_std_format.md) - control `std::format`/`std::formatter` support

docs/mkdocs/docs/api/macros/json_has_cpp_11.md

@@ -49,6 +49,6 @@ The default value is detected based on preprocessor macros such as `#!cpp __cplu
 
 ## Version history
 
-- Added in version 3.10.5.
+- Added in version 3.10.0.
 - Added `JSON_HAS_CPP_23` in version 3.12.0.
 - Added `JSON_HAS_CPP_26` in version 3.13.0.

docs/mkdocs/docs/api/macros/json_has_range_view_conversion.md

@@ -0,0 +1,43 @@
+# JSON_HAS_RANGE_VIEW_CONVERSION
+
+```cpp
+#define JSON_HAS_RANGE_VIEW_CONVERSION /* value */
+```
+
+This macro indicates whether a JSON array can be constructed directly from a C++20 range view (`std::ranges::view`),
+such as the result of `std::views::filter` or `std::views::transform`. Possible values are `1` when supported or `0`
+when unsupported.
+
+## Default definition
+
+The default value is `1` if [`JSON_HAS_RANGES`](json_has_ranges.md) is `1` and the compiler is not MinGW (that is,
+`#!cpp __MINGW32__` is not defined), and `0` otherwise.
+
+When the macro is not defined, the library will define it to its default value.
+
+!!! info "Known compiler/stdlib exclusions"
+
+    - **MinGW** -- disabled, because its `std::ranges` support is incomplete ([issue #4916](https://github.com/nlohmann/json/issues/4916)).
+    - All toolchains for which [`JSON_HAS_RANGES`](json_has_ranges.md#default-definition) is disabled.
+
+## Examples
+
+??? example
+
+    The code below forces the library to disable the conversion from range views:
+
+    ```cpp
+    #define JSON_HAS_RANGE_VIEW_CONVERSION 0
+    #include <nlohmann/json.hpp>
+
+    ...
+    ```
+
+## See also
+
+- [JSON_HAS_RANGES](json_has_ranges.md) - control `std::ranges` support
+- [Constructing from a C++20 range view](../../features/conversions.md#putting-values-in) - usage of the feature
+
+## Version history
+
+- Added in version 3.13.0.

docs/mkdocs/docs/api/macros/json_has_ranges.md

@@ -20,7 +20,7 @@ When the macro is not defined, the library will define it to its default value.
     
     - **GCC 11.1.0** — disabled (the shipped `<ranges>` header has a syntax error; [issue #4440](https://github.com/nlohmann/json/issues/4440))
     - **libstdc++ < 11** — disabled (incomplete C++20 ranges support; [issue #4440](https://github.com/nlohmann/json/issues/4440))
-    - **Clang < 16 with libstdc++** — disabled (incomplete ranges support; [issue #4440](https://github.com/nlohmann/json/issues/4440))
+    - **Clang < 16 with libstdc++** — disabled (incomplete ranges support; [issue #5161](https://github.com/nlohmann/json/issues/5161))
     - **libc++ < 160000** — disabled (incomplete C++20 ranges support; [issue #4440](https://github.com/nlohmann/json/issues/4440))
     - **nvcc (CUDA) 12.0.x and 12.1.x** — disabled (the `enable_borrowed_range` variable-template syntax triggers a parse error
       under these two toolkit versions; fixed in CUDA 12.2; [issue #3907](https://github.com/nlohmann/json/issues/3907))
@@ -44,9 +44,12 @@ When the macro is not defined, the library will define it to its default value.
 
 - [JSON_HAS_CPP_11 / JSON_HAS_CPP_14 / JSON_HAS_CPP_17 / JSON_HAS_CPP_20 / JSON_HAS_CPP_23 /
   JSON_HAS_CPP_26](json_has_cpp_11.md) - set supported C++ standard
+- [JSON_HAS_RANGE_VIEW_CONVERSION](json_has_range_view_conversion.md) - control construction from `std::ranges` views
 - [JSON_HAS_STD_FORMAT](json_has_std_format.md) - a similar feature-detection macro, for `std::format`/`std::formatter`
   support
 
 ## Version history
 
 - Added in version 3.11.0.
+- Added the exclusions for libstdc++ < 11, Clang < 16 with libstdc++, libc++ < 16, and nvcc (CUDA) 12.0.x and 12.1.x in
+  version 3.13.0. Before, only GCC 11.1.0 was excluded.

docs/mkdocs/docs/api/macros/json_strict_binary_utf8.md

@@ -20,7 +20,10 @@ The macro does not affect:
 - The binary readers ([`from_cbor`](../basic_json/from_cbor.md), [`from_msgpack`](../basic_json/from_msgpack.md),
   [`from_ubjson`](../basic_json/from_ubjson.md), [`from_bjdata`](../basic_json/from_bjdata.md),
   [`from_bson`](../basic_json/from_bson.md)): none of these formats requires a decoder to reject ill-formed UTF-8, so
-  they always return the bytes unchanged.
+  by default they return the bytes unchanged (`error_handler_t::keep`), independent of this macro. Pass an
+  `error_handler` argument explicitly to validate or sanitize the strings they read.
+- [`from_bon8`](../basic_json/from_bon8.md): BON8 always validates, because the UTF-8 lead bytes mark where a string
+  ends.
 
 ## Default definition
 

docs/mkdocs/docs/api/macros/json_use_implicit_conversions.md

@@ -67,7 +67,7 @@ By default, implicit conversions are enabled.
     `JSON_USE_IMPLICIT_CONVERSIONS` is defined to `0`:
 
     ```cpp
-    using wjson = nlohmann::basic_json<std::map, std::vector, std::wstring>;
+    using wjson = nlohmann::json::with_string_t<std::wstring>;
 
     void load(const nlohmann::json& j);
 

docs/mkdocs/docs/api/macros/nlohmann_define_derived_type.md

@@ -190,3 +190,5 @@ void to_json(BasicJsonType& j, const B& b) {
 4. Added in version 3.12.0.
 5. Added in version 3.12.0.
 6. Added in version 3.12.0.
+
+All six macros were changed to allow an empty member list in version 3.13.0.

docs/mkdocs/docs/api/macros/nlohmann_define_type_intrusive.md

@@ -186,3 +186,6 @@ See the examples below for the concrete generated code.
 1. Added in version 3.9.0.
 2. Added in version 3.11.0.
 3. Added in version 3.11.3.
+
+All three macros were changed to work with any `basic_json` specialization (not only `nlohmann::json`) in version 3.12.0,
+and to allow an empty member list in version 3.13.0.

docs/mkdocs/docs/api/macros/nlohmann_define_type_non_intrusive.md

@@ -185,3 +185,6 @@ See the examples below for the concrete generated code.
 1. Added in version 3.9.0.
 2. Added in version 3.11.0.
 3. Added in version 3.11.3.
+
+All three macros were changed to work with any `basic_json` specialization (not only `nlohmann::json`) in version 3.12.0,
+and to allow an empty member list in version 3.13.0.

docs/mkdocs/docs/api/macros/nlohmann_json_namespace.md

@@ -38,4 +38,6 @@ the library.
 
 ## Version history
 
-- Added in version 3.11.0. Changed inline namespace name in version 3.11.2.
+- Added in version 3.11.0. Changed inline namespace name in version 3.11.2. Added the ABI tag `_dp` in
+  version 3.12.0, and the ABI tags `_bics`, `_psp`, `_snul`, `_sbu8`, and `_ekmo` in version 3.13.0; see
+  [`nlohmann` Namespace](../../features/namespace.md#structure).

docs/mkdocs/docs/api/macros/nlohmann_json_namespace_begin.md

@@ -14,7 +14,7 @@ These macros can be used to open and close the `nlohmann` namespace. See
 ## Default definition
 
 The default definitions open and close the `nlohmann` namespace. The precise definition of
-[`NLOHMANN_JSON_NAMESPACE_BEGIN`] varies as described [here](../../features/namespace.md#structure).
+`NLOHMANN_JSON_NAMESPACE_BEGIN` varies as described [here](../../features/namespace.md#structure).
 
 1. Default definition of `NLOHMANN_JSON_NAMESPACE_BEGIN`:
 

docs/mkdocs/docs/community/assurance_case.md

@@ -10,7 +10,7 @@ The library parses, stores, and serializes JSON values in memory. It does not op
 files (it only reads from streams or `std::FILE*` handles that the caller has already opened), does not read environment
 variables, and does not implement cryptography or handle credentials.
 
-The primary threat is therefore **untrusted input**: JSON text or binary data (BJData, BSON, CBOR, MessagePack, UBJSON)
+The primary threat is therefore **untrusted input**: JSON text or binary data (BJData, BON8, BSON, CBOR, MessagePack, UBJSON)
 that an attacker controls, passed to [`parse`](../api/basic_json/parse.md), [`accept`](../api/basic_json/accept.md),
 [`sax_parse`](../api/basic_json/sax_parse.md), or one of the `from_*` functions such as
 [`from_cbor`](../api/basic_json/from_cbor.md). Such input may try to

docs/mkdocs/docs/community/quality_assurance.md

@@ -12,7 +12,7 @@ violations will result in a failed build.
 
 Note: C++20 modules support may hit compiler-specific issues not covered by the general compiler matrix below. See [Modules](../features/modules.md#known-issues) for known issues and workarounds.
 
-Note: Some modern features (like C++20 ranges or filesystem support) may be disabled on specific broken or incomplete toolchains even when standard feature-test macros indicate support. See [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md) and [`JSON_HAS_FILESYSTEM`](../api/macros/json_has_filesystem.md) for details on known exclusions.
+Note: Some modern features (like C++20 ranges or filesystem support) may be disabled on specific broken or incomplete toolchains even when standard feature-test macros indicate support. See [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md), [`JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md), and [`JSON_HAS_FILESYSTEM`](../api/macros/json_has_filesystem.md) for details on known exclusions.
 
 - [x] The library is compiled with 50+ different C++ compilers with different operating systems and platforms,
   including the oldest versions known to compile the library.
@@ -107,7 +107,7 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
 - [x] The library is compiled with all C++ language revisions (C++11, C++14, C++17, C++20, C++23, and C++26) to detect
   and fix language deprecations early.
 - [x] The library is checked for compiler warnings:
-  - On Clang, `-Weverything` is used with 8 exceptions.
+  - On Clang, `-Weverything` is used with 7 exceptions.
 
     ??? abstract "Clang warnings"
 

docs/mkdocs/docs/community/roadmap.md

@@ -36,13 +36,26 @@ work items are tracked in the [GitHub milestones](https://github.com/nlohmann/js
 ## API stability
 
 Releases follow [semantic versioning](https://semver.org): a minor or patch release of version 3.x does not break code
-that uses the public API. In particular, a 3.x release does not:
+that uses the public API, unless that code opts in to a change with a macro as described [below](#version-40). In
+particular, a 3.x release does not:
 
-- change the signature of a function (its parameter types, return type, number of parameters, or the const-ness of a
-  member function);
-- remove or rename a function or class;
+- make breaking changes to the signature of a function: the types or order of its existing parameters, its return type,
+  its `noexcept` or `constexpr` specifier, or the const-ness of a member function. New parameters may be added if they
+  have a default value;
+- remove or rename a function or class, or change the template parameters of a public class template;
 - change which exceptions a function throws, or the [exception ids](../home/exceptions.md);
-- change access specifiers or default arguments.
+- change access specifiers, or change or remove existing default arguments. New default arguments may be added;
+- change the JSON type that a valid input parses to, or the text that `dump()` produces for a valid value;
+- accept input that was rejected before, or reject input that was accepted before;
+- change the order in which the keys of an object are iterated. The default type sorts keys, and
+  [`ordered_json`](../api/ordered_json.md) keeps insertion order;
+- change when iterators, pointers, or references are invalidated, or the state of a moved-from `basic_json`;
+- add or remove implicit conversions from `basic_json`;
+- change how `to_json` and `from_json` functions are found, or the behavior of
+  [`adl_serializer`](../api/adl_serializer/index.md);
+- add pure virtual functions to the [`json_sax`](../api/json_sax/index.md) interface;
+- remove, rename, renumber, or add enumerators of `value_t`;
+- remove or rename a documented macro, CMake option, CMake target, or header, or change what a documented macro does.
 
 Exceptions to these rules, for instance when fixing a bug requires changing the exception a function throws, are
 documented in the [release notes](../home/releases.md).
@@ -51,13 +64,14 @@ The following are **not** part of the public API and may change in any release,
 
 - The text of exception messages returned by `what()`. Use the [exception id](../home/exceptions.md) to tell errors
   apart.
-- The ABI, including `sizeof(basic_json)` and the memory layout of its values. Recompile your code when you upgrade the
-  library. The [versioned inline namespace](../features/namespace.md) turns mixing versions into a link error.
+- The ABI, including `sizeof(basic_json)` and the memory layout of its values. The
+  [versioned inline namespace](../features/namespace.md) turns mixing versions into a link error.
+- The hash values returned by `std::hash` for `basic_json`. Numbers that compare equal still hash equally.
 - Everything in namespace `nlohmann::detail`, and macros and type traits that are not documented in the
   [API reference](../api/basic_json/index.md).
 
-Changes that would break the public API are only added behind a macro whose default keeps the 3.x behavior, see
-[Version 4.0](#version-40).
+Breaking changes are only added behind a macro whose default keeps the 3.x behavior. See [Version 4.0](#version-40) and
+the [macro overview](../features/macros.md).
 
 ## Version 4.0
 

docs/mkdocs/docs/examples/as_base_class.cpp

@@ -15,19 +15,7 @@ class base_class_with_hidden_members
     }
 };
 
-using json = nlohmann::basic_json <
-             std::map,
-             std::vector,
-             std::string,
-             bool,
-             std::int64_t,
-             std::uint64_t,
-             double,
-             std::allocator,
-             nlohmann::adl_serializer,
-             std::vector<std::uint8_t>,
-             base_class_with_hidden_members
-             >;
+using json = nlohmann::json::with_base_class_t<base_class_with_hidden_members>;
 
 int main()
 {

docs/mkdocs/docs/examples/contains__json_pointer.cpp

@@ -19,25 +19,9 @@ int main()
               << j.contains("/array/1"_json_pointer) << '\n'
               << j.contains("/array/-"_json_pointer) << '\n'
               << j.contains("/array/4"_json_pointer) << '\n'
-              << j.contains("/baz"_json_pointer) << std::endl;
-
-    try
-    {
-        // try to use an array index with leading '0'
-        j.contains("/array/01"_json_pointer);
-    }
-    catch (const json::parse_error& e)
-    {
-        std::cout << e.what() << '\n';
-    }
-
-    try
-    {
-        // try to use an array index that is not a number
-        j.contains("/array/one"_json_pointer);
-    }
-    catch (const json::parse_error& e)
-    {
-        std::cout << e.what() << '\n';
-    }
+              << j.contains("/baz"_json_pointer) << '\n'
+              // an array index with a leading '0' is not found
+              << j.contains("/array/01"_json_pointer) << '\n'
+              // an array index that is not a number is not found
+              << j.contains("/array/one"_json_pointer) << std::endl;
 }

docs/mkdocs/docs/examples/contains__json_pointer.output

@@ -5,3 +5,5 @@ true
 false
 false
 false
+false
+false

docs/mkdocs/docs/examples/custom_array_type.cpp

@@ -1,11 +1,10 @@
 #include <iostream>
-#include <map>
 
 #include <nlohmann/json.hpp>
 
 #include "custom_array_type.hpp"
 
-using custom_json = nlohmann::basic_json<std::map, custom_array_type>;
+using custom_json = nlohmann::json::with_array_t<custom_array_type>;
 
 int main()
 {

docs/mkdocs/docs/examples/custom_binary_type.cpp

@@ -1,16 +1,10 @@
-#include <cstdint>
 #include <iostream>
-#include <map>
-#include <string>
-#include <vector>
 
 #include <nlohmann/json.hpp>
 
 #include "custom_binary_type.hpp"
 
-using custom_json = nlohmann::basic_json<std::map, std::vector, std::string, bool,
-      std::int64_t, std::uint64_t, double, std::allocator,
-      nlohmann::adl_serializer, custom_binary_type>;
+using custom_json = nlohmann::json::with_binary_t<custom_binary_type>;
 
 int main()
 {

docs/mkdocs/docs/examples/custom_object_type.cpp

@@ -1,12 +1,11 @@
 #include <iostream>
 #include <type_traits>
-#include <vector>
 
 #include <nlohmann/json.hpp>
 
 #include "custom_object_type.hpp"
 
-using custom_json = nlohmann::basic_json<custom_object_type, std::vector>;
+using custom_json = nlohmann::json::with_object_t<custom_object_type>;
 
 int main()
 {

docs/mkdocs/docs/examples/custom_string_type.cpp

@@ -1,12 +1,10 @@
 #include <iostream>
-#include <map>
-#include <vector>
 
 #include <nlohmann/json.hpp>
 
 #include "custom_string_type.hpp"
 
-using custom_json = nlohmann::basic_json<std::map, std::vector, custom_string_type>;
+using custom_json = nlohmann::json::with_string_t<custom_string_type>;
 
 int main()
 {

docs/mkdocs/docs/examples/parse_error.cpp

@@ -8,7 +8,7 @@ int main()
     try
     {
         // parsing input with a syntax error
-        json::parse("[1,2,3,]");
+        json j = json::parse("[1,2,3,]");
     }
     catch (const json::parse_error& e)
     {

docs/mkdocs/docs/features/conversions.md

@@ -217,7 +217,8 @@ json j = numbers;   // [1,2,3]
     ```
 
     This requires [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md) to be enabled and is unavailable on MinGW due
-    to incomplete C++20 ranges support there.
+    to incomplete C++20 ranges support there; see
+    [`JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md).
 
 ## Your own types
 

docs/mkdocs/docs/features/macros.md

@@ -82,6 +82,45 @@ To override the built-in check, define `JSON_HAS_FILESYSTEM` or `JSON_HAS_EXPERI
 
 See [full documentation of `JSON_HAS_FILESYSTEM` and `JSON_HAS_EXPERIMENTAL_FILESYSTEM`](../api/macros/json_has_filesystem.md).
 
+## `JSON_HAS_RANGES`
+
+The library uses `std::ranges` (and concepts) where available, for example, to parse from C++20 ranges and to
+construct JSON arrays from range views. The library detects whether the standard library supports ranges and
+disables the support on toolchains with an incomplete implementation. To override the built-in check, define
+`JSON_HAS_RANGES` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_RANGES`](../api/macros/json_has_ranges.md).
+
+## `JSON_HAS_RANGE_VIEW_CONVERSION`
+
+When `JSON_HAS_RANGES` is enabled (and the compiler is not MinGW), a JSON array can be constructed directly from a C++20
+range view such as `std::views::filter(...)`. To override the built-in check, define `JSON_HAS_RANGE_VIEW_CONVERSION` to
+`1` or `0`.
+
+See [full documentation of `JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md).
+
+## `JSON_HAS_STATIC_RTTI`
+
+The library detects whether the compiler supports run time type information (RTTI), which it needs, for instance, to
+exclude `std::any` from the candidate types of the implicit conversion on C++17. To override the built-in check, define
+`JSON_HAS_STATIC_RTTI` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_STATIC_RTTI`](../api/macros/json_has_static_rtti.md).
+
+## `JSON_HAS_STD_FORMAT`
+
+When compiling with C++20 and a standard library that provides `<format>`, the library provides a `std::formatter`
+specialization for JSON values. To override the built-in check, define `JSON_HAS_STD_FORMAT` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md).
+
+## `JSON_HAS_THREE_WAY_COMPARISON`
+
+When the compiler and standard library support 3-way comparison (the spaceship operator `<=>`), the library provides it
+for JSON values. To override the built-in check, define `JSON_HAS_THREE_WAY_COMPARISON` to `1` or `0`.
+
+See [full documentation of `JSON_HAS_THREE_WAY_COMPARISON`](../api/macros/json_has_three_way_comparison.md).
+
 ## `JSON_NOEXCEPTION`
 
 Exceptions can be switched off by defining the symbol `JSON_NOEXCEPTION`.

docs/mkdocs/docs/features/namespace.md

@@ -101,3 +101,9 @@ follows:
 
 - Introduced inline namespace (`json_v3_11_0[_abi-tag]*`) in version 3.11.0.
 - Changed structure of inline namespace in version 3.11.2.
+- Added ABI tag `_dp` ([`JSON_DIAGNOSTIC_POSITIONS`](../api/macros/json_diagnostic_positions.md)) in version 3.12.0.
+- Added ABI tags `_bics` ([`JSON_BRACE_INIT_COPY_SEMANTICS`](../api/macros/json_brace_init_copy_semantics.md)), `_psp`
+  ([`JSON_PRECISE_STREAM_POSITION`](../api/macros/json_precise_stream_position.md)), `_snul`
+  ([`JSON_STRICT_NUL_HANDLING`](../api/macros/json_strict_nul_handling.md)), `_sbu8`
+  ([`JSON_STRICT_BINARY_UTF8`](../api/macros/json_strict_binary_utf8.md)), and `_ekmo`
+  ([`JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS`](../api/macros/json_use_objects_for_enum_keyed_maps.md)) in version 3.13.0.

docs/mkdocs/docs/features/types/number_handling.md

@@ -351,9 +351,8 @@ The number types can be changed with template parameters.
 
     A `basic_json` type that uses `#!c long double` as floating-point type.
 
-    ```cpp hl_lines="2"
-    using json_ld = nlohmann::basic_json<std::map, std::vector, std::string, bool,
-                                         std::int64_t, std::uint64_t, long double>;
+    ```cpp hl_lines="1"
+    using json_ld = nlohmann::json::with_float_t<long double>;
     ```
 
     Note values should then be parsed with `json_ld::parse` rather than `json::parse` as the latter would parse

docs/mkdocs/docs/features/types/template_parameters.md

@@ -8,6 +8,10 @@ these requirements so they do not have to be discovered by trial and error. Each
 that are known to work for that parameter and the ones that do not, checked against Boost 1.83, Abseil 20250127.0,
 Folly, EASTL 3.21, `ankerl::unordered_dense`, `phmap`, `gtl`, `robin_hood`, `tsl::ordered_map`, and Qt 6.
 
+To change a single template parameter and keep the others, use the member alias templates
+[`with_*_t`](../../api/basic_json/with_t.md); for instance, `nlohmann::json::with_float_t<long double>` is `json` with
+`#!cpp long double` as [`number_float_t`](../../api/basic_json/number_float_t.md).
+
 ## How to read this page
 
 Requirements are split into two groups:
@@ -143,7 +147,7 @@ struct unordered_map_object
     using base_t::base_t;
 };
 
-using unordered_json = nlohmann::basic_json<unordered_map_object>;
+using unordered_json = nlohmann::json::with_object_t<unordered_map_object>;
 ```
 
 Whether `#!cpp std::unordered_map` can be instantiated at all depends on the standard library: `object_t` is formed
@@ -176,7 +180,7 @@ struct flat_hash_object
     using base_t::base_t;
 };
 
-using flat_hash_json = nlohmann::basic_json<flat_hash_object>;
+using flat_hash_json = nlohmann::json::with_object_t<flat_hash_object>;
 ```
 
 `absl::node_hash_map` keeps references to the mapped values valid across insertions; `absl::flat_hash_map` does not,

docs/mkdocs/docs/home/architecture.md

@@ -34,7 +34,7 @@ flowchart LR
 
 - **JSON text** is read by an [input adapter](#input-adapters), tokenized by the lexer, and turned into SAX events by
   the parser.
-- **Binary formats** (BJData, BSON, CBOR, MessagePack, UBJSON) are read by an input adapter and turned into the same SAX
+- **Binary formats** (BJData, BON8, BSON, CBOR, MessagePack, UBJSON) are read by an input adapter and turned into the same SAX
   events by the `binary_reader`.
 - A [SAX consumer](#sax-interface) receives the events. The one used by [`parse`](../api/basic_json/parse.md) builds a
   `basic_json` value tree.

docs/mkdocs/docs/home/design_goals.md

@@ -6,7 +6,7 @@ There are myriads of [JSON](https://json.org) libraries out there, and each may
 
 - **Trivial integration**. Our whole code consists of a single header file [`json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp). That's it. No library, no subproject, no dependencies, no complex build system. The class is written in vanilla C++11. All in all, everything should require no adjustment of your compiler flags or project settings.
 
-- **Serious testing**. Our class is heavily [unit-tested](https://github.com/nlohmann/json/tree/develop/tests/src) and covers [100%](https://coveralls.io/r/nlohmann/json) of the code, including all exceptional behavior. Furthermore, we checked with [Valgrind](http://valgrind.org) and the [Clang Sanitizers](https://clang.llvm.org/docs/index.html) that there are no memory leaks. [Google OSS-Fuzz](https://github.com/google/oss-fuzz/tree/master/projects/json) additionally runs fuzz tests against all parsers 24/7, effectively executing billions of tests so far. To maintain high quality, the project is following the [OpenSSF Best Practices](https://www.bestpractices.dev/projects/289).
+- **Serious testing**. Our class is heavily [unit-tested](https://github.com/nlohmann/json/tree/develop/tests/src) and covers [100%](https://coveralls.io/r/nlohmann/json) of the code, including all exceptional behavior. Furthermore, we checked with [Valgrind](https://valgrind.org) and the [Clang Sanitizers](https://clang.llvm.org/docs/index.html) that there are no memory leaks. [Google OSS-Fuzz](https://github.com/google/oss-fuzz/tree/master/projects/json) additionally runs fuzz tests against all parsers 24/7, effectively executing billions of tests so far. To maintain high quality, the project is following the [OpenSSF Best Practices](https://www.bestpractices.dev/projects/289).
 
 Other aspects were not so important to us:
 
@@ -14,4 +14,4 @@ Other aspects were not so important to us:
 
 - **Speed**. There are certainly [faster JSON libraries](https://github.com/miloyip/nativejson-benchmark#parsing-time) out there. However, if your goal is to speed up your development by adding JSON support with a single header, then this library is the way to go. If you know how to use a `std::vector` or `std::map`, you are already set.
 
-See the [contribution guidelines](https://github.com/nlohmann/json/blob/master/.github/CONTRIBUTING.md#please-dont) for more information.
+See the [contribution guidelines](https://github.com/nlohmann/json/blob/develop/.github/CONTRIBUTING.md#please-dont) for more information.

docs/mkdocs/docs/home/exceptions.md

@@ -104,7 +104,7 @@ See [documentation of `JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md) for
 ## Parse errors
 
 The library throws this exception when a parse error occurs. Parse errors
-can occur during the deserialization of JSON text, CBOR, MessagePack, as well
+can occur during the deserialization of JSON text or of one of the binary formats (BJData, BON8, BSON, CBOR, MessagePack, UBJSON), as well
 as when using JSON Patch.
 
 Exceptions have ids 1xx.
@@ -190,7 +190,7 @@ This error indicates a syntax error while deserializing a JSON text. The error m
 !!! tip
 
     - Make sure the input is correctly read. Try to write the input to standard output to check if, for instance, the input file was successfully opened.
-    - Paste the input to a JSON validator like <http://jsonlint.com> or a tool like [jq](https://stedolan.github.io/jq/).
+    - Paste the input to a JSON validator like <https://jsonlint.com> or a tool like [jq](https://jqlang.github.io/jq/).
 
 ### json.exception.parse_error.102
 

docs/mkdocs/docs/home/releases.md

@@ -26,7 +26,7 @@ Fixes bugs found in 3.11.3 and adds several features. All changes are backward-c
   [BJData](../features/binary_formats/bjdata.md) draft 3 and unsigned 64-bit integers for
   [BSON](../features/binary_formats/bson.md).
 - Adds multidimensional C-array conversion and UTF-8 encoded `std::filesystem::path` conversions, and
-  lowers the minimum [CMake](../integration/cmake.md) version to allow CMake 4.0.
+  raises the minimum [CMake](../integration/cmake.md) version to 3.5 and supports CMake 4.0.
 
 [Full release notes](https://github.com/nlohmann/json/releases/tag/v3.12.0).
 

docs/mkdocs/docs/integration/hunter/CMakeLists.txt

@@ -2,8 +2,8 @@ cmake_minimum_required(VERSION 3.15)
 
 include("cmake/HunterGate.cmake")
 HunterGate(
-    URL "https://github.com/cpp-pm/hunter/archive/v0.23.297.tar.gz"
-    SHA1 "3319fe6a3b08090df7df98dee75134d68e2ef5a3"
+    URL "https://github.com/cpp-pm/hunter/archive/v0.26.12.tar.gz"
+    SHA1 "6498c5d0dec25d7fffb2b0574ebaf265179b894d"
 )
 
 project(json_example)

docs/mkdocs/docs/integration/migration_guide.md

@@ -116,7 +116,7 @@ function to use instead.
     === "Deprecated"
   
           ```cpp
-          using my_json = nlohmann::basic_json<std::map, std::vector, my_string_type>;
+          using my_json = nlohmann::json::with_string_t<my_string_type>;
           nlohmann::json_pointer<my_json> ptr("/foo/bar/1");
           ```
   

docs/mkdocs/hooks/copy_markdown_source.py

@@ -2,12 +2,30 @@
 
 # Creates a `<path>.md` sibling of each HTML output (for example,
 # `features/comments/` becomes `features/comments.md`) so agents and tools can
-# fetch the raw Markdown directly instead of parsing rendered HTML.
+# fetch the raw Markdown directly instead of parsing rendered HTML. The
+# `--8<-- "path"` lines of pymdownx.snippets are expanded with the extension's
+# own preprocessor and the settings from mkdocs.yml, so the copies contain the
+# included example code and files instead of the include directives.
 
+import io
 import os
-import shutil
+
+import markdown
+from pymdownx.snippets import SnippetMissingError
 
 _pages = []
+_snippets = None
+
+
+def on_config(config):
+    global _snippets
+    md = markdown.Markdown(
+        extensions=["pymdownx.snippets"],
+        extension_configs={"pymdownx.snippets": config["mdx_configs"].get("pymdownx.snippets", {})},
+    )
+    _snippets = md.preprocessors["snippet"]
+    _snippets.auto_append = []  # the glossary is only needed to render abbreviations
+    return config
 
 
 def on_files(files, config):
@@ -22,4 +40,11 @@ def on_post_build(config):
         url = file.url.rstrip("/")
         target = os.path.join(site_dir, (url or "index") + ".md")
         os.makedirs(os.path.dirname(target), exist_ok=True)
-        shutil.copyfile(file.abs_src_path, target)
+        with io.open(file.abs_src_path, encoding="utf-8", newline="") as source:
+            text = source.read()
+        try:
+            text = "\n".join(_snippets.run(text.split("\n")))
+        except (SnippetMissingError, OSError):
+            pass  # keep the include directives; the regular build reports the missing file
+        with io.open(target, "w", encoding="utf-8", newline="") as copy:
+            copy.write(text)

docs/mkdocs/includes/glossary.md

@@ -1,7 +1,7 @@
 <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary -->
 
 *[ADL]: Argument-dependent lookup
-*[API]: Application Programming Interfaces
+*[API]: Application Programming Interface
 *[ASCII]: American Standard Code for Information Interchange
 *[BDFL]: Benevolent Dictator for Life
 *[BJData]: Binary JData

docs/mkdocs/mkdocs.yml

@@ -299,6 +299,7 @@ nav:
           - 'JSON_DISABLE_TUPLE_REFERENCE_CONVERSION': api/macros/json_disable_tuple_reference_conversion.md
           - 'JSON_HAS_CPP_11, JSON_HAS_CPP_14, JSON_HAS_CPP_17, JSON_HAS_CPP_20, JSON_HAS_CPP_23, JSON_HAS_CPP_26': api/macros/json_has_cpp_11.md
           - 'JSON_HAS_EXPERIMENTAL_FILESYSTEM, JSON_HAS_FILESYSTEM': api/macros/json_has_filesystem.md
+          - 'JSON_HAS_RANGE_VIEW_CONVERSION': api/macros/json_has_range_view_conversion.md
           - 'JSON_HAS_RANGES': api/macros/json_has_ranges.md
           - 'JSON_HAS_STATIC_RTTI': api/macros/json_has_static_rtti.md
           - 'JSON_HAS_STD_FORMAT': api/macros/json_has_std_format.md

docs/mkdocs/scripts/check_structure.py

@@ -288,36 +288,6 @@ def check_header_links() -> None:
                                f'link to "{match.group(0)}" does not point to a documentation page')
 
 
-def check_docset() -> None:
-    """Every API page and every macro has an entry in the docset index; no entry points to a missing page."""
-    entry_re = re.compile(r"VALUES \('((?:[^']|'')*)', '(\w+)', '([^']*)'\);")
-    names_by_path = {}
-    with open("../../docset/docSet.sql", encoding="utf-8") as sql:
-        for name, _, path in entry_re.findall(sql.read()):
-            names_by_path.setdefault(path, set()).add(name.replace("''", "'"))
-
-    def to_path(page):
-        if os.path.basename(page) == "index.md":
-            return page[:-len("index.md")] + "index.html"
-        return page[:-len(".md")] + "/index.html"
-
-    pages = sorted(glob.glob("**/*.md", recursive=True))
-    for path in sorted(set(names_by_path) - {to_path(p) for p in pages}):
-        report("docset/stale_entry", "../../docset/docSet.sql", f'entry "{path}" has no documentation page')
-    for page in (p for p in pages if p.startswith("api/")):
-        names = names_by_path.get(to_path(page))
-        if not names:
-            report("docset/missing_entry", page, "page has no entry in docs/docset/docSet.sql")
-        elif page.startswith("api/macros/") and os.path.basename(page) != "index.md":
-            with open(page, encoding="utf-8") as content:
-                text = content.read()
-            match = re.search(r"^# (.+)$", text, re.MULTILINE) or re.search(r"<h1>(.*?)</h1>", text, re.DOTALL)
-            title = re.sub(r"<[^>]+>|\s+", " ", match.group(1))
-            for macro in filter(None, (x.strip() for x in re.split(r"[,/]", title))):
-                if macro not in names:
-                    report("docset/missing_macro", page, f'macro "{macro}" has no entry in docs/docset/docSet.sql')
-
-
 if __name__ == "__main__":
     print(120 * "-")
     check_structure()
@@ -327,7 +297,6 @@ if __name__ == "__main__":
     check_heading_levels()
     check_image_alt_text()
     check_header_links()
-    check_docset()
     print(120 * "-")
 
     if warnings > 0:

include/nlohmann/detail/bit_ops.hpp

@@ -9,12 +9,15 @@
 #pragma once
 
 #include <cstdint> // uint64_t
+#if !defined(__SIZEOF_INT128__) && defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64))
+    #include <intrin0.h> // __umulh, _umul128
+#endif
 
 #include <nlohmann/detail/abi_macros.hpp>
 
 // Portable bit-level helpers for the number and string scanners. They use
-// compiler builtins where available and plain C++ otherwise, so they need no
-// platform headers and work regardless of byte order.
+// compiler builtins or platform-specific intrinsics where available and plain
+// C++ otherwise, so they work regardless of byte order.
 
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
@@ -52,6 +55,12 @@ inline uint128_parts full_multiplication(std::uint64_t a, std::uint64_t b) noexc
     __extension__ using uint128 = unsigned __int128;
     const uint128 r = static_cast<uint128>(a) * b;
     return {static_cast<std::uint64_t>(r), static_cast<std::uint64_t>(r >> 64u)};
+#elif defined(_MSC_VER) && defined(_M_X64)
+    std::uint64_t high = 0;
+    const std::uint64_t low = _umul128(a, b, &high);
+    return {low, high};
+#elif defined(_MSC_VER) && defined(_M_ARM64)
+    return {a * b, __umulh(a, b)};
 #else
     const std::uint64_t a_lo = a & 0xFFFFFFFFu;
     const std::uint64_t a_hi = a >> 32u;

include/nlohmann/detail/json_pointer.hpp

@@ -16,8 +16,8 @@
     #include <iosfwd> // ostream
 #endif  // JSON_NO_IO
 #include <limits> // max
+#include <map> // map
 #include <numeric> // accumulate
-#include <set> // set
 #include <string> // string
 #include <utility> // move
 #include <vector> // vector
@@ -359,33 +359,82 @@ class json_pointer
 
   private:
     /*!
-    @brief the reference token sequences that denote arrays
+    @brief the pointer prefixes of a flattened object, and which of them denote arrays
 
     @ref unflatten collects the pointer prefixes that have a reference token 0
     among their children; @ref get_and_create creates arrays exactly below
     those prefixes and objects everywhere else. Deciding this up front keeps
     the result independent of the order in which the flattened object is
     iterated, which is unspecified for some object types.
+
+    The prefixes form a tree and are numbered, so each of them is stored only
+    once (as a node) rather than as a copy of all of its reference tokens.
     */
-    using array_parents_t = std::set<std::vector<string_t>>;
+    struct prefix_tree
+    {
+        // children[id] maps a reference token to the number of the prefix
+        // extended by that token; number 0 is the empty prefix
+        std::vector<std::map<string_t, std::size_t>> children;
+        // is_array[id] is true iff some flattened key has the reference token
+        // 0 directly below the prefix with number id
+        std::vector<bool> is_array;
+
+        // start with the empty prefix only
+        prefix_tree()
+            : children(1)
+            , is_array(1, false)
+        {}
+
+        // return the number of the prefix with number id extended by
+        // reference_token, adding it if it is new
+        std::size_t add_child(std::size_t id, string_t&& reference_token)
+        {
+            if (reference_token == "0")
+            {
+                is_array[id] = true;
+            }
+
+            // read the number before the emplace_back below, which may
+            // reallocate children and invalidate the iterator
+            const std::size_t next = children.size();
+            const auto inserted = children[id].emplace(std::move(reference_token), next);
+            const std::size_t child = inserted.first->second;
+            if (inserted.second)
+            {
+                children.emplace_back();
+                is_array.push_back(false);
+            }
+            return child;
+        }
+
+        // return the number of the prefix with number id extended by
+        // reference_token, which must have been added before
+        std::size_t find_child(std::size_t id, const string_t& reference_token) const
+        {
+            const auto it = children[id].find(reference_token);
+            JSON_ASSERT(it != children[id].end());
+            return it->second;
+        }
+    };
 
     /*!
     @brief create and return a reference to the pointed to value
 
-    Complexity: Linear in the number of reference tokens.
+    Complexity: Linear in the number of reference tokens (times the logarithm
+    of the number of siblings for the prefix lookup).
 
     @throw parse_error.106 if an array index begins with '0'
     @throw parse_error.109 if array index is not a number
     @throw type_error.313 if value cannot be unflattened
     */
     template<typename BasicJsonType>
-    BasicJsonType& get_and_create(BasicJsonType& j, const array_parents_t& array_parents) const
+    BasicJsonType& get_and_create(BasicJsonType& j, const prefix_tree& tree) const
     {
         auto* result = &j;
 
-        // the reference tokens that have been consumed so far; used to look up
-        // whether the value to be created below is an array or an object
-        std::vector<string_t> prefix;
+        // the number of the prefix consumed so far; used to look up whether
+        // the value to be created below is an array or an object
+        std::size_t id = 0;
 
         // in case no reference tokens exist, return a reference to the JSON value
         // j which will be overwritten by a primitive value
@@ -395,7 +444,7 @@ class json_pointer
             {
                 case detail::value_t::null:
                 {
-                    if (array_parents.find(prefix) != array_parents.end())
+                    if (tree.is_array[id])
                     {
                         // some reference token below this position is 0, so the
                         // value is an array
@@ -440,7 +489,7 @@ class json_pointer
                     JSON_THROW(detail::type_error::create(313, "invalid value to unflatten", &j));
             }
 
-            prefix.push_back(reference_token);
+            id = tree.find_child(id, reference_token);
         }
 
         return *result;
@@ -878,64 +927,131 @@ class json_pointer
     @param[in,out] result        the result object to insert values to
 
     @note Empty objects or arrays are flattened to `null`.
+
+    The value is walked with an explicit stack rather than the call stack, so
+    arbitrarily deeply nested values can be flattened.
+
+    @sa https://github.com/nlohmann/json/issues/5393
     */
     template<typename BasicJsonType>
     static void flatten(const string_t& reference_string,
                         const BasicJsonType& value,
                         BasicJsonType& result)
     {
-        switch (value.type())
+        using object_const_iterator = typename BasicJsonType::object_t::const_iterator;
+
+        // an array or object being walked: the container, the array index or
+        // object iterator of the next child, and the length of the path of the
+        // container itself
+        struct frame
         {
-            case detail::value_t::array:
-            {
-                if (value.m_data.m_value.array->empty())
-                {
-                    // flatten empty array as null
-                    result[reference_string] = nullptr;
-                }
-                else
-                {
-                    // iterate array and use index as a reference string
-                    for (std::size_t i = 0; i < value.m_data.m_value.array->size(); ++i)
-                    {
-                        flatten(detail::concat<string_t>(reference_string, '/', std::to_string(i)),
-                                value.m_data.m_value.array->operator[](i), result);
-                    }
-                }
-                break;
-            }
+            frame(const BasicJsonType* container_, object_const_iterator member_, const std::size_t path_length_) noexcept
+                : container(container_), member(std::move(member_)), path_length(path_length_)
+            {}
 
-            case detail::value_t::object:
-            {
-                if (value.m_data.m_value.object->empty())
-                {
-                    // flatten empty object as null
-                    result[reference_string] = nullptr;
-                }
-                else
-                {
-                    // iterate object and use keys as reference string
-                    for (const auto& element : *value.m_data.m_value.object)
-                    {
-                        flatten(detail::concat<string_t>(reference_string, '/', detail::escape(element.first)), element.second, result);
-                    }
-                }
-                break;
-            }
+            const BasicJsonType* container;
+            std::size_t index = 0;
+            object_const_iterator member;
+            std::size_t path_length;
+        };
 
-            case detail::value_t::null:
-            case detail::value_t::string:
-            case detail::value_t::boolean:
-            case detail::value_t::number_integer:
-            case detail::value_t::number_unsigned:
-            case detail::value_t::number_float:
-            case detail::value_t::binary:
-            case detail::value_t::discarded:
-            default:
+        // The containers being flattened are kept on an explicit stack, and
+        // every child is flattened completely before the next one, so the
+        // entries come out in the same order as with a recursive walk. The
+        // path of the value being flattened is kept in one buffer that grows
+        // and shrinks with the stack, rather than in a new string per level.
+        std::vector<frame> stack;
+        string_t path = reference_string;
+
+        // flatten `v`, whose path is `path`: primitives and empty containers
+        // are added to the result right away; other containers get a frame
+        const auto enter = [&stack, &path, &result](const BasicJsonType & v)
+        {
+            switch (v.type())
             {
-                // add a primitive value with its reference string
-                result[reference_string] = value;
-                break;
+                case detail::value_t::array:
+                {
+                    if (v.m_data.m_value.array->empty())
+                    {
+                        // flatten empty array as null
+                        result[path] = nullptr;
+                    }
+                    else
+                    {
+                        stack.emplace_back(&v, object_const_iterator(), path.size());
+                    }
+                    return;
+                }
+
+                case detail::value_t::object:
+                {
+                    if (v.m_data.m_value.object->empty())
+                    {
+                        // flatten empty object as null
+                        result[path] = nullptr;
+                    }
+                    else
+                    {
+                        stack.emplace_back(&v, v.m_data.m_value.object->begin(), path.size());
+                    }
+                    return;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                {
+                    // add a primitive value with its reference string
+                    result[path] = v;
+                    return;
+                }
+            }
+        };
+
+        enter(value);
+        while (!stack.empty())
+        {
+            // the frame is changed through stack.back(): enter() may push a
+            // frame, which would invalidate a reference to it
+            const BasicJsonType* const container = stack.back().container;
+
+            // drop the path of the previous child
+            path.resize(stack.back().path_length);
+
+            if (container->is_array())
+            {
+                const auto& array = *container->m_data.m_value.array;
+                const std::size_t i = stack.back().index;
+                if (i == array.size())
+                {
+                    stack.pop_back();
+                    continue;
+                }
+
+                // iterate array and use index as a reference string
+                ++stack.back().index;
+                detail::concat_into(path, '/', detail::to_string<string_t>(i));
+                enter(array[i]);
+            }
+            else
+            {
+                const object_const_iterator it = stack.back().member;
+                if (it == container->m_data.m_value.object->end())
+                {
+                    stack.pop_back();
+                    continue;
+                }
+
+                // iterate object and use keys as reference string
+                ++stack.back().member;
+                detail::concat_into(path, '/', detail::escape(it->first));
+                enter(it->second);
             }
         }
     }
@@ -963,19 +1079,15 @@ class json_pointer
 
         // collect the pointer prefixes that have a reference token 0 among
         // their children; the values below them are arrays, all others are
-        // objects (see array_parents_t)
-        array_parents_t array_parents;
+        // objects (see prefix_tree)
+        prefix_tree tree;
         for (const auto& element : *value.m_data.m_value.object)
         {
             json_pointer ptr(element.first);
-            std::vector<string_t> prefix;
+            std::size_t id = 0;
             for (auto& reference_token : ptr.reference_tokens)
             {
-                if (reference_token == "0")
-                {
-                    array_parents.insert(prefix);
-                }
-                prefix.push_back(std::move(reference_token));
+                id = tree.add_child(id, std::move(reference_token));
             }
         }
 
@@ -991,7 +1103,7 @@ class json_pointer
             // that if the JSON pointer is "" (i.e., points to the whole value),
             // function get_and_create returns a reference to the result itself.
             // An assignment will then create a primitive value.
-            json_pointer(element.first).get_and_create(result, array_parents) = element.second;
+            json_pointer(element.first).get_and_create(result, tree) = element.second;
         }
 
         return result;

include/nlohmann/detail/output/binary_writer.hpp

@@ -85,6 +85,12 @@ template<typename BasicJsonType, typename CharType, typename OutputSinkType = ou
 class binary_writer
 {
     using string_t = typename BasicJsonType::string_t;
+
+    /// an object key as string_t: a reference when object_t::key_type already is
+    /// string_t, otherwise a converted copy that outlives sanitize_utf8_for_write's result
+    using object_key_string_t = typename std::conditional <
+                                std::is_same<typename BasicJsonType::object_t::key_type, string_t>::value,
+                                const string_t&, string_t >::type;
     using binary_t = typename BasicJsonType::binary_t;
     using number_float_t = typename BasicJsonType::number_float_t;
 
@@ -244,16 +250,7 @@ class binary_writer
 
             case value_t::string:
             {
-                string_t storage;
-                const string_t& value = sanitize_utf8_for_write(*j.m_data.m_value.string, j, storage);
-
-                // step 1: write control byte and the string length
-                write_cbor_head(0x60, value.size());
-
-                // step 2: write the string
-                oa.write_characters(
-                      reinterpret_cast<const CharType*>(value.data()),
-                      value.size());
+                write_cbor_string(*j.m_data.m_value.string, j);
                 break;
             }
 
@@ -316,23 +313,20 @@ class binary_writer
 
             case value_t::object:
             {
+                static_assert(
+                    std::is_convertible <
+                    typename BasicJsonType::object_t::key_type,
+                    string_t >::value,
+                    "object_t::key_type must be implicitly convertible to string_t");
+
                 // step 1: write control byte and the object size
                 write_cbor_head(0xA0, j.m_data.m_value.object->size());
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
-                    // el.first is checked here, against the object as
-                    // diagnostics context, because write_cbor(el.first)
-                    // converts it to a temporary basic_json that would be
-                    // used as the context instead; for error_handler_t::keep
-                    // and ::replace/::ignore the recursive write_cbor(el.first)
-                    // call below handles the key like any other string, so no
-                    // separate check is needed here for those
-                    if (error_handler == error_handler_t::strict)
-                    {
-                        check_utf8(el.first, j);
-                    }
-                    write_cbor(el.first);
+                    // el.first is written directly (not via a temporary
+                    // basic_json), with the object as diagnostics context
+                    write_cbor_string(el.first, j);
                     write_cbor(el.second, depth + 1);
                 }
                 break;
@@ -491,39 +485,7 @@ class binary_writer
 
             case value_t::string:
             {
-                string_t storage;
-                const string_t& value = sanitize_utf8_for_write(*j.m_data.m_value.string, j, storage);
-
-                // step 1: write control byte and the string length
-                const auto N = to_msgpack_length(value.size(), j);
-                if (N <= 31)
-                {
-                    // fixstr
-                    write_number(static_cast<std::uint8_t>(0xA0 | N));
-                }
-                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
-                {
-                    // str 8
-                    oa.write_character(to_char_type(0xD9));
-                    write_number(static_cast<std::uint8_t>(N));
-                }
-                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
-                {
-                    // str 16
-                    oa.write_character(to_char_type(0xDA));
-                    write_number(static_cast<std::uint16_t>(N));
-                }
-                else
-                {
-                    // str 32
-                    oa.write_character(to_char_type(0xDB));
-                    write_number(static_cast<std::uint32_t>(N));
-                }
-
-                // step 2: write the string
-                oa.write_characters(
-                      reinterpret_cast<const CharType*>(value.data()),
-                      value.size());
+                write_msgpack_string(*j.m_data.m_value.string, j);
                 break;
             }
 
@@ -629,19 +591,20 @@ class binary_writer
 
             case value_t::object:
             {
+                static_assert(
+                    std::is_convertible <
+                    typename BasicJsonType::object_t::key_type,
+                    string_t >::value,
+                    "object_t::key_type must be implicitly convertible to string_t");
+
                 // step 1: write control byte and the object size
                 write_msgpack_object_prefix(j.m_data.m_value.object->size(), j);
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
-                    // as in write_cbor, el.first is checked here against the
-                    // object as diagnostics context; the recursive call below
-                    // handles keep/replace/ignore like any other string
-                    if (error_handler == error_handler_t::strict)
-                    {
-                        check_utf8(el.first, j);
-                    }
-                    write_msgpack(el.first);
+                    // as in write_cbor, el.first is written directly with the
+                    // object as diagnostics context
+                    write_msgpack_string(el.first, j);
                     write_msgpack(el.second, depth + 1);
                 }
                 break;
@@ -819,8 +782,10 @@ class binary_writer
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
+                    // a converted key must outlive the reference returned by sanitize_utf8_for_write
+                    const object_key_string_t key_string = el.first;
                     string_t storage;
-                    const string_t& key = sanitize_utf8_for_write(el.first, j, storage);
+                    const string_t& key = sanitize_utf8_for_write(key_string, j, storage);
                     write_number_with_ubjson_prefix(key.size(), true, use_bjdata);
                     oa.write_characters(
                           reinterpret_cast<const CharType*>(key.data()),
@@ -1025,13 +990,9 @@ class binary_writer
                     continue;
                 }
 
-                // el.first is checked here, against the object as diagnostics
-                // context, like the matching check in write_cbor's object case
-                if (error_handler == error_handler_t::strict)
-                {
-                    check_utf8(current.object_it->first, *current.value);
-                }
-                write_cbor(current.object_it->first);
+                // the key is written directly (not via a temporary basic_json),
+                // with the object as diagnostics context, as in write_cbor
+                write_cbor_string(current.object_it->first, *current.value);
                 const BasicJsonType* child = &(current.object_it->second);
                 ++stack.back().object_it;
                 write_cbor_value_or_push(*child, stack);
@@ -1106,11 +1067,9 @@ class binary_writer
                     continue;
                 }
 
-                if (error_handler == error_handler_t::strict)
-                {
-                    check_utf8(current.object_it->first, *current.value);
-                }
-                write_msgpack(current.object_it->first);
+                // as in write_cbor_iterative, the key is written directly with
+                // the object as diagnostics context
+                write_msgpack_string(current.object_it->first, *current.value);
                 const BasicJsonType* child = &(current.object_it->second);
                 ++stack.back().object_it;
                 write_msgpack_value_or_push(*child, stack);
@@ -1366,8 +1325,10 @@ class binary_writer
                     continue;
                 }
 
+                // a converted key must outlive the reference returned by sanitize_utf8_for_write
+                const object_key_string_t key_string = current.object_it->first;
                 string_t storage;
-                const string_t& key = sanitize_utf8_for_write(current.object_it->first, j, storage);
+                const string_t& key = sanitize_utf8_for_write(key_string, j, storage);
                 write_number_with_ubjson_prefix(key.size(), true, use_bjdata);
                 oa.write_characters(
                       reinterpret_cast<const CharType*>(key.data()),
@@ -1988,6 +1949,85 @@ class binary_writer
         }
     }
 
+    /*!
+    @brief write a CBOR text string
+
+    @a value is checked or sanitized according to @ref error_handler, with
+    @a context (the string value itself, or the object a key belongs to) used
+    as diagnostics context; this avoids converting object keys to a temporary
+    basic_json just to write them
+
+    @note When object_t::key_type is not string_t, @a value is a temporary
+          string_t converted from the key, which lives only until the end of
+          the caller's statement. The reference returned by
+          @ref sanitize_utf8_for_write may refer to it, so it must not escape
+          this function.
+    */
+    void write_cbor_string(const string_t& value, const BasicJsonType& context)
+    {
+        string_t storage;
+        const string_t& sanitized = sanitize_utf8_for_write(value, context, storage);
+
+        // step 1: write control byte and the string length
+        write_cbor_head(0x60, sanitized.size());
+
+        // step 2: write the string
+        oa.write_characters(
+              reinterpret_cast<const CharType*>(sanitized.data()),
+              sanitized.size());
+    }
+
+    /////////////
+    // MsgPack //
+    /////////////
+
+    /*!
+    @brief write a MessagePack str
+
+    @a value is checked or sanitized according to @ref error_handler, with
+    @a context used as diagnostics context, as in @ref write_cbor_string
+
+    @note As in @ref write_cbor_string, @a value may be a temporary string_t
+          converted from a key, so the reference returned by
+          @ref sanitize_utf8_for_write must not escape this function.
+    */
+    void write_msgpack_string(const string_t& value, const BasicJsonType& context)
+    {
+        string_t storage;
+        const string_t& sanitized = sanitize_utf8_for_write(value, context, storage);
+
+        // step 1: write control byte and the string length
+        const auto N = to_msgpack_length(sanitized.size(), context);
+        if (N <= 31)
+        {
+            // fixstr
+            write_number(static_cast<std::uint8_t>(0xA0 | N));
+        }
+        else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+        {
+            // str 8
+            oa.write_character(to_char_type(0xD9));
+            write_number(static_cast<std::uint8_t>(N));
+        }
+        else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+        {
+            // str 16
+            oa.write_character(to_char_type(0xDA));
+            write_number(static_cast<std::uint16_t>(N));
+        }
+        else
+        {
+            // str 32
+            oa.write_character(to_char_type(0xDB));
+            write_number(static_cast<std::uint32_t>(N));
+        }
+
+        // step 2: write the string
+        oa.write_characters(
+              reinterpret_cast<const CharType*>(sanitized.data()),
+              sanitized.size());
+    }
+
     ////////////
     // UBJSON //
     ////////////
@@ -2730,6 +2770,11 @@ class binary_writer
     itself in every case but a sanitized `replace`/`ignore` one, so @a
     storage must outlive the returned reference only then.
 
+    @a s must be an lvalue that outlives the returned reference. An object key
+    whose `key_type` is not @ref string_t must therefore first be converted
+    into a named string_t (see @ref object_key_string_t); the deleted overload
+    below enforces this at compile time.
+
     @param[in] s        the string (value or object key) to write
     @param[in] context  the value @a s belongs to (for diagnostics)
     @param[out] storage  backing storage for a sanitized copy
@@ -2759,6 +2804,10 @@ class binary_writer
         }
     }
 
+    /// deleted: anything but a string_t would bind a temporary that dies before the returned reference is used
+    template < typename T, enable_if_t < !std::is_same<T, string_t>::value, int > = 0 >
+    const string_t& sanitize_utf8_for_write(const T& /*s*/, const BasicJsonType& /*context*/, string_t& /*storage*/) const = delete; // NOLINT(hicpp-use-equals-delete,modernize-use-equals-delete): a private helper's guard, not part of the interface
+
     /*!
     @brief write an integer in the shortest encoding
 

include/nlohmann/detail/string_utils.hpp

@@ -108,8 +108,8 @@ void encode_utf8(std::uint32_t cp, const Out& out)
 ///////////////////
 
 // UTF-8 decoder states used by decode() below
-static constexpr std::uint8_t UTF8_ACCEPT = 0;
-static constexpr std::uint8_t UTF8_REJECT = 1;
+JSON_INLINE_VARIABLE constexpr std::uint8_t UTF8_ACCEPT = 0;
+JSON_INLINE_VARIABLE constexpr std::uint8_t UTF8_REJECT = 1;
 
 /*!
 @brief process a byte of a UTF-8 sequence

single_include/nlohmann/json.hpp

@@ -6395,8 +6395,8 @@ void encode_utf8(std::uint32_t cp, const Out& out)
 ///////////////////
 
 // UTF-8 decoder states used by decode() below
-static constexpr std::uint8_t UTF8_ACCEPT = 0;
-static constexpr std::uint8_t UTF8_REJECT = 1;
+JSON_INLINE_VARIABLE constexpr std::uint8_t UTF8_ACCEPT = 0;
+JSON_INLINE_VARIABLE constexpr std::uint8_t UTF8_REJECT = 1;
 
 /*!
 @brief process a byte of a UTF-8 sequence
@@ -8791,13 +8791,16 @@ NLOHMANN_JSON_NAMESPACE_END
 
 
 #include <cstdint> // uint64_t
+#if !defined(__SIZEOF_INT128__) && defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64))
+    #include <intrin0.h> // __umulh, _umul128
+#endif
 
 // #include <nlohmann/detail/abi_macros.hpp>
 
 
 // Portable bit-level helpers for the number and string scanners. They use
-// compiler builtins where available and plain C++ otherwise, so they need no
-// platform headers and work regardless of byte order.
+// compiler builtins or platform-specific intrinsics where available and plain
+// C++ otherwise, so they work regardless of byte order.
 
 NLOHMANN_JSON_NAMESPACE_BEGIN
 namespace detail
@@ -8835,6 +8838,12 @@ inline uint128_parts full_multiplication(std::uint64_t a, std::uint64_t b) noexc
     __extension__ using uint128 = unsigned __int128;
     const uint128 r = static_cast<uint128>(a) * b;
     return {static_cast<std::uint64_t>(r), static_cast<std::uint64_t>(r >> 64u)};
+#elif defined(_MSC_VER) && defined(_M_X64)
+    std::uint64_t high = 0;
+    const std::uint64_t low = _umul128(a, b, &high);
+    return {low, high};
+#elif defined(_MSC_VER) && defined(_M_ARM64)
+    return {a * b, __umulh(a, b)};
 #else
     const std::uint64_t a_lo = a & 0xFFFFFFFFu;
     const std::uint64_t a_hi = a >> 32u;
@@ -19919,8 +19928,8 @@ NLOHMANN_JSON_NAMESPACE_END
     #include <iosfwd> // ostream
 #endif  // JSON_NO_IO
 #include <limits> // max
+#include <map> // map
 #include <numeric> // accumulate
-#include <set> // set
 #include <string> // string
 #include <utility> // move
 #include <vector> // vector
@@ -20268,33 +20277,82 @@ class json_pointer
 
   private:
     /*!
-    @brief the reference token sequences that denote arrays
+    @brief the pointer prefixes of a flattened object, and which of them denote arrays
 
     @ref unflatten collects the pointer prefixes that have a reference token 0
     among their children; @ref get_and_create creates arrays exactly below
     those prefixes and objects everywhere else. Deciding this up front keeps
     the result independent of the order in which the flattened object is
     iterated, which is unspecified for some object types.
+
+    The prefixes form a tree and are numbered, so each of them is stored only
+    once (as a node) rather than as a copy of all of its reference tokens.
     */
-    using array_parents_t = std::set<std::vector<string_t>>;
+    struct prefix_tree
+    {
+        // children[id] maps a reference token to the number of the prefix
+        // extended by that token; number 0 is the empty prefix
+        std::vector<std::map<string_t, std::size_t>> children;
+        // is_array[id] is true iff some flattened key has the reference token
+        // 0 directly below the prefix with number id
+        std::vector<bool> is_array;
+
+        // start with the empty prefix only
+        prefix_tree()
+            : children(1)
+            , is_array(1, false)
+        {}
+
+        // return the number of the prefix with number id extended by
+        // reference_token, adding it if it is new
+        std::size_t add_child(std::size_t id, string_t&& reference_token)
+        {
+            if (reference_token == "0")
+            {
+                is_array[id] = true;
+            }
+
+            // read the number before the emplace_back below, which may
+            // reallocate children and invalidate the iterator
+            const std::size_t next = children.size();
+            const auto inserted = children[id].emplace(std::move(reference_token), next);
+            const std::size_t child = inserted.first->second;
+            if (inserted.second)
+            {
+                children.emplace_back();
+                is_array.push_back(false);
+            }
+            return child;
+        }
+
+        // return the number of the prefix with number id extended by
+        // reference_token, which must have been added before
+        std::size_t find_child(std::size_t id, const string_t& reference_token) const
+        {
+            const auto it = children[id].find(reference_token);
+            JSON_ASSERT(it != children[id].end());
+            return it->second;
+        }
+    };
 
     /*!
     @brief create and return a reference to the pointed to value
 
-    Complexity: Linear in the number of reference tokens.
+    Complexity: Linear in the number of reference tokens (times the logarithm
+    of the number of siblings for the prefix lookup).
 
     @throw parse_error.106 if an array index begins with '0'
     @throw parse_error.109 if array index is not a number
     @throw type_error.313 if value cannot be unflattened
     */
     template<typename BasicJsonType>
-    BasicJsonType& get_and_create(BasicJsonType& j, const array_parents_t& array_parents) const
+    BasicJsonType& get_and_create(BasicJsonType& j, const prefix_tree& tree) const
     {
         auto* result = &j;
 
-        // the reference tokens that have been consumed so far; used to look up
-        // whether the value to be created below is an array or an object
-        std::vector<string_t> prefix;
+        // the number of the prefix consumed so far; used to look up whether
+        // the value to be created below is an array or an object
+        std::size_t id = 0;
 
         // in case no reference tokens exist, return a reference to the JSON value
         // j which will be overwritten by a primitive value
@@ -20304,7 +20362,7 @@ class json_pointer
             {
                 case detail::value_t::null:
                 {
-                    if (array_parents.find(prefix) != array_parents.end())
+                    if (tree.is_array[id])
                     {
                         // some reference token below this position is 0, so the
                         // value is an array
@@ -20349,7 +20407,7 @@ class json_pointer
                     JSON_THROW(detail::type_error::create(313, "invalid value to unflatten", &j));
             }
 
-            prefix.push_back(reference_token);
+            id = tree.find_child(id, reference_token);
         }
 
         return *result;
@@ -20787,64 +20845,131 @@ class json_pointer
     @param[in,out] result        the result object to insert values to
 
     @note Empty objects or arrays are flattened to `null`.
+
+    The value is walked with an explicit stack rather than the call stack, so
+    arbitrarily deeply nested values can be flattened.
+
+    @sa https://github.com/nlohmann/json/issues/5393
     */
     template<typename BasicJsonType>
     static void flatten(const string_t& reference_string,
                         const BasicJsonType& value,
                         BasicJsonType& result)
     {
-        switch (value.type())
+        using object_const_iterator = typename BasicJsonType::object_t::const_iterator;
+
+        // an array or object being walked: the container, the array index or
+        // object iterator of the next child, and the length of the path of the
+        // container itself
+        struct frame
         {
-            case detail::value_t::array:
-            {
-                if (value.m_data.m_value.array->empty())
-                {
-                    // flatten empty array as null
-                    result[reference_string] = nullptr;
-                }
-                else
-                {
-                    // iterate array and use index as a reference string
-                    for (std::size_t i = 0; i < value.m_data.m_value.array->size(); ++i)
-                    {
-                        flatten(detail::concat<string_t>(reference_string, '/', std::to_string(i)),
-                                value.m_data.m_value.array->operator[](i), result);
-                    }
-                }
-                break;
-            }
+            frame(const BasicJsonType* container_, object_const_iterator member_, const std::size_t path_length_) noexcept
+                : container(container_), member(std::move(member_)), path_length(path_length_)
+            {}
 
-            case detail::value_t::object:
-            {
-                if (value.m_data.m_value.object->empty())
-                {
-                    // flatten empty object as null
-                    result[reference_string] = nullptr;
-                }
-                else
-                {
-                    // iterate object and use keys as reference string
-                    for (const auto& element : *value.m_data.m_value.object)
-                    {
-                        flatten(detail::concat<string_t>(reference_string, '/', detail::escape(element.first)), element.second, result);
-                    }
-                }
-                break;
-            }
+            const BasicJsonType* container;
+            std::size_t index = 0;
+            object_const_iterator member;
+            std::size_t path_length;
+        };
 
-            case detail::value_t::null:
-            case detail::value_t::string:
-            case detail::value_t::boolean:
-            case detail::value_t::number_integer:
-            case detail::value_t::number_unsigned:
-            case detail::value_t::number_float:
-            case detail::value_t::binary:
-            case detail::value_t::discarded:
-            default:
+        // The containers being flattened are kept on an explicit stack, and
+        // every child is flattened completely before the next one, so the
+        // entries come out in the same order as with a recursive walk. The
+        // path of the value being flattened is kept in one buffer that grows
+        // and shrinks with the stack, rather than in a new string per level.
+        std::vector<frame> stack;
+        string_t path = reference_string;
+
+        // flatten `v`, whose path is `path`: primitives and empty containers
+        // are added to the result right away; other containers get a frame
+        const auto enter = [&stack, &path, &result](const BasicJsonType & v)
+        {
+            switch (v.type())
             {
-                // add a primitive value with its reference string
-                result[reference_string] = value;
-                break;
+                case detail::value_t::array:
+                {
+                    if (v.m_data.m_value.array->empty())
+                    {
+                        // flatten empty array as null
+                        result[path] = nullptr;
+                    }
+                    else
+                    {
+                        stack.emplace_back(&v, object_const_iterator(), path.size());
+                    }
+                    return;
+                }
+
+                case detail::value_t::object:
+                {
+                    if (v.m_data.m_value.object->empty())
+                    {
+                        // flatten empty object as null
+                        result[path] = nullptr;
+                    }
+                    else
+                    {
+                        stack.emplace_back(&v, v.m_data.m_value.object->begin(), path.size());
+                    }
+                    return;
+                }
+
+                case detail::value_t::null:
+                case detail::value_t::string:
+                case detail::value_t::boolean:
+                case detail::value_t::number_integer:
+                case detail::value_t::number_unsigned:
+                case detail::value_t::number_float:
+                case detail::value_t::binary:
+                case detail::value_t::discarded:
+                default:
+                {
+                    // add a primitive value with its reference string
+                    result[path] = v;
+                    return;
+                }
+            }
+        };
+
+        enter(value);
+        while (!stack.empty())
+        {
+            // the frame is changed through stack.back(): enter() may push a
+            // frame, which would invalidate a reference to it
+            const BasicJsonType* const container = stack.back().container;
+
+            // drop the path of the previous child
+            path.resize(stack.back().path_length);
+
+            if (container->is_array())
+            {
+                const auto& array = *container->m_data.m_value.array;
+                const std::size_t i = stack.back().index;
+                if (i == array.size())
+                {
+                    stack.pop_back();
+                    continue;
+                }
+
+                // iterate array and use index as a reference string
+                ++stack.back().index;
+                detail::concat_into(path, '/', detail::to_string<string_t>(i));
+                enter(array[i]);
+            }
+            else
+            {
+                const object_const_iterator it = stack.back().member;
+                if (it == container->m_data.m_value.object->end())
+                {
+                    stack.pop_back();
+                    continue;
+                }
+
+                // iterate object and use keys as reference string
+                ++stack.back().member;
+                detail::concat_into(path, '/', detail::escape(it->first));
+                enter(it->second);
             }
         }
     }
@@ -20872,19 +20997,15 @@ class json_pointer
 
         // collect the pointer prefixes that have a reference token 0 among
         // their children; the values below them are arrays, all others are
-        // objects (see array_parents_t)
-        array_parents_t array_parents;
+        // objects (see prefix_tree)
+        prefix_tree tree;
         for (const auto& element : *value.m_data.m_value.object)
         {
             json_pointer ptr(element.first);
-            std::vector<string_t> prefix;
+            std::size_t id = 0;
             for (auto& reference_token : ptr.reference_tokens)
             {
-                if (reference_token == "0")
-                {
-                    array_parents.insert(prefix);
-                }
-                prefix.push_back(std::move(reference_token));
+                id = tree.add_child(id, std::move(reference_token));
             }
         }
 
@@ -20900,7 +21021,7 @@ class json_pointer
             // that if the JSON pointer is "" (i.e., points to the whole value),
             // function get_and_create returns a reference to the result itself.
             // An assignment will then create a primitive value.
-            json_pointer(element.first).get_and_create(result, array_parents) = element.second;
+            json_pointer(element.first).get_and_create(result, tree) = element.second;
         }
 
         return result;
@@ -21581,6 +21702,12 @@ template<typename BasicJsonType, typename CharType, typename OutputSinkType = ou
 class binary_writer
 {
     using string_t = typename BasicJsonType::string_t;
+
+    /// an object key as string_t: a reference when object_t::key_type already is
+    /// string_t, otherwise a converted copy that outlives sanitize_utf8_for_write's result
+    using object_key_string_t = typename std::conditional <
+                                std::is_same<typename BasicJsonType::object_t::key_type, string_t>::value,
+                                const string_t&, string_t >::type;
     using binary_t = typename BasicJsonType::binary_t;
     using number_float_t = typename BasicJsonType::number_float_t;
 
@@ -21740,16 +21867,7 @@ class binary_writer
 
             case value_t::string:
             {
-                string_t storage;
-                const string_t& value = sanitize_utf8_for_write(*j.m_data.m_value.string, j, storage);
-
-                // step 1: write control byte and the string length
-                write_cbor_head(0x60, value.size());
-
-                // step 2: write the string
-                oa.write_characters(
-                      reinterpret_cast<const CharType*>(value.data()),
-                      value.size());
+                write_cbor_string(*j.m_data.m_value.string, j);
                 break;
             }
 
@@ -21812,23 +21930,20 @@ class binary_writer
 
             case value_t::object:
             {
+                static_assert(
+                    std::is_convertible <
+                    typename BasicJsonType::object_t::key_type,
+                    string_t >::value,
+                    "object_t::key_type must be implicitly convertible to string_t");
+
                 // step 1: write control byte and the object size
                 write_cbor_head(0xA0, j.m_data.m_value.object->size());
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
-                    // el.first is checked here, against the object as
-                    // diagnostics context, because write_cbor(el.first)
-                    // converts it to a temporary basic_json that would be
-                    // used as the context instead; for error_handler_t::keep
-                    // and ::replace/::ignore the recursive write_cbor(el.first)
-                    // call below handles the key like any other string, so no
-                    // separate check is needed here for those
-                    if (error_handler == error_handler_t::strict)
-                    {
-                        check_utf8(el.first, j);
-                    }
-                    write_cbor(el.first);
+                    // el.first is written directly (not via a temporary
+                    // basic_json), with the object as diagnostics context
+                    write_cbor_string(el.first, j);
                     write_cbor(el.second, depth + 1);
                 }
                 break;
@@ -21987,39 +22102,7 @@ class binary_writer
 
             case value_t::string:
             {
-                string_t storage;
-                const string_t& value = sanitize_utf8_for_write(*j.m_data.m_value.string, j, storage);
-
-                // step 1: write control byte and the string length
-                const auto N = to_msgpack_length(value.size(), j);
-                if (N <= 31)
-                {
-                    // fixstr
-                    write_number(static_cast<std::uint8_t>(0xA0 | N));
-                }
-                else if (N <= (std::numeric_limits<std::uint8_t>::max)())
-                {
-                    // str 8
-                    oa.write_character(to_char_type(0xD9));
-                    write_number(static_cast<std::uint8_t>(N));
-                }
-                else if (N <= (std::numeric_limits<std::uint16_t>::max)())
-                {
-                    // str 16
-                    oa.write_character(to_char_type(0xDA));
-                    write_number(static_cast<std::uint16_t>(N));
-                }
-                else
-                {
-                    // str 32
-                    oa.write_character(to_char_type(0xDB));
-                    write_number(static_cast<std::uint32_t>(N));
-                }
-
-                // step 2: write the string
-                oa.write_characters(
-                      reinterpret_cast<const CharType*>(value.data()),
-                      value.size());
+                write_msgpack_string(*j.m_data.m_value.string, j);
                 break;
             }
 
@@ -22125,19 +22208,20 @@ class binary_writer
 
             case value_t::object:
             {
+                static_assert(
+                    std::is_convertible <
+                    typename BasicJsonType::object_t::key_type,
+                    string_t >::value,
+                    "object_t::key_type must be implicitly convertible to string_t");
+
                 // step 1: write control byte and the object size
                 write_msgpack_object_prefix(j.m_data.m_value.object->size(), j);
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
-                    // as in write_cbor, el.first is checked here against the
-                    // object as diagnostics context; the recursive call below
-                    // handles keep/replace/ignore like any other string
-                    if (error_handler == error_handler_t::strict)
-                    {
-                        check_utf8(el.first, j);
-                    }
-                    write_msgpack(el.first);
+                    // as in write_cbor, el.first is written directly with the
+                    // object as diagnostics context
+                    write_msgpack_string(el.first, j);
                     write_msgpack(el.second, depth + 1);
                 }
                 break;
@@ -22315,8 +22399,10 @@ class binary_writer
 
                 for (const auto& el : *j.m_data.m_value.object)
                 {
+                    // a converted key must outlive the reference returned by sanitize_utf8_for_write
+                    const object_key_string_t key_string = el.first;
                     string_t storage;
-                    const string_t& key = sanitize_utf8_for_write(el.first, j, storage);
+                    const string_t& key = sanitize_utf8_for_write(key_string, j, storage);
                     write_number_with_ubjson_prefix(key.size(), true, use_bjdata);
                     oa.write_characters(
                           reinterpret_cast<const CharType*>(key.data()),
@@ -22521,13 +22607,9 @@ class binary_writer
                     continue;
                 }
 
-                // el.first is checked here, against the object as diagnostics
-                // context, like the matching check in write_cbor's object case
-                if (error_handler == error_handler_t::strict)
-                {
-                    check_utf8(current.object_it->first, *current.value);
-                }
-                write_cbor(current.object_it->first);
+                // the key is written directly (not via a temporary basic_json),
+                // with the object as diagnostics context, as in write_cbor
+                write_cbor_string(current.object_it->first, *current.value);
                 const BasicJsonType* child = &(current.object_it->second);
                 ++stack.back().object_it;
                 write_cbor_value_or_push(*child, stack);
@@ -22602,11 +22684,9 @@ class binary_writer
                     continue;
                 }
 
-                if (error_handler == error_handler_t::strict)
-                {
-                    check_utf8(current.object_it->first, *current.value);
-                }
-                write_msgpack(current.object_it->first);
+                // as in write_cbor_iterative, the key is written directly with
+                // the object as diagnostics context
+                write_msgpack_string(current.object_it->first, *current.value);
                 const BasicJsonType* child = &(current.object_it->second);
                 ++stack.back().object_it;
                 write_msgpack_value_or_push(*child, stack);
@@ -22862,8 +22942,10 @@ class binary_writer
                     continue;
                 }
 
+                // a converted key must outlive the reference returned by sanitize_utf8_for_write
+                const object_key_string_t key_string = current.object_it->first;
                 string_t storage;
-                const string_t& key = sanitize_utf8_for_write(current.object_it->first, j, storage);
+                const string_t& key = sanitize_utf8_for_write(key_string, j, storage);
                 write_number_with_ubjson_prefix(key.size(), true, use_bjdata);
                 oa.write_characters(
                       reinterpret_cast<const CharType*>(key.data()),
@@ -23484,6 +23566,85 @@ class binary_writer
         }
     }
 
+    /*!
+    @brief write a CBOR text string
+
+    @a value is checked or sanitized according to @ref error_handler, with
+    @a context (the string value itself, or the object a key belongs to) used
+    as diagnostics context; this avoids converting object keys to a temporary
+    basic_json just to write them
+
+    @note When object_t::key_type is not string_t, @a value is a temporary
+          string_t converted from the key, which lives only until the end of
+          the caller's statement. The reference returned by
+          @ref sanitize_utf8_for_write may refer to it, so it must not escape
+          this function.
+    */
+    void write_cbor_string(const string_t& value, const BasicJsonType& context)
+    {
+        string_t storage;
+        const string_t& sanitized = sanitize_utf8_for_write(value, context, storage);
+
+        // step 1: write control byte and the string length
+        write_cbor_head(0x60, sanitized.size());
+
+        // step 2: write the string
+        oa.write_characters(
+              reinterpret_cast<const CharType*>(sanitized.data()),
+              sanitized.size());
+    }
+
+    /////////////
+    // MsgPack //
+    /////////////
+
+    /*!
+    @brief write a MessagePack str
+
+    @a value is checked or sanitized according to @ref error_handler, with
+    @a context used as diagnostics context, as in @ref write_cbor_string
+
+    @note As in @ref write_cbor_string, @a value may be a temporary string_t
+          converted from a key, so the reference returned by
+          @ref sanitize_utf8_for_write must not escape this function.
+    */
+    void write_msgpack_string(const string_t& value, const BasicJsonType& context)
+    {
+        string_t storage;
+        const string_t& sanitized = sanitize_utf8_for_write(value, context, storage);
+
+        // step 1: write control byte and the string length
+        const auto N = to_msgpack_length(sanitized.size(), context);
+        if (N <= 31)
+        {
+            // fixstr
+            write_number(static_cast<std::uint8_t>(0xA0 | N));
+        }
+        else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+        {
+            // str 8
+            oa.write_character(to_char_type(0xD9));
+            write_number(static_cast<std::uint8_t>(N));
+        }
+        else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+        {
+            // str 16
+            oa.write_character(to_char_type(0xDA));
+            write_number(static_cast<std::uint16_t>(N));
+        }
+        else
+        {
+            // str 32
+            oa.write_character(to_char_type(0xDB));
+            write_number(static_cast<std::uint32_t>(N));
+        }
+
+        // step 2: write the string
+        oa.write_characters(
+              reinterpret_cast<const CharType*>(sanitized.data()),
+              sanitized.size());
+    }
+
     ////////////
     // UBJSON //
     ////////////
@@ -24226,6 +24387,11 @@ class binary_writer
     itself in every case but a sanitized `replace`/`ignore` one, so @a
     storage must outlive the returned reference only then.
 
+    @a s must be an lvalue that outlives the returned reference. An object key
+    whose `key_type` is not @ref string_t must therefore first be converted
+    into a named string_t (see @ref object_key_string_t); the deleted overload
+    below enforces this at compile time.
+
     @param[in] s        the string (value or object key) to write
     @param[in] context  the value @a s belongs to (for diagnostics)
     @param[out] storage  backing storage for a sanitized copy
@@ -24255,6 +24421,10 @@ class binary_writer
         }
     }
 
+    /// deleted: anything but a string_t would bind a temporary that dies before the returned reference is used
+    template < typename T, enable_if_t < !std::is_same<T, string_t>::value, int > = 0 >
+    const string_t& sanitize_utf8_for_write(const T& /*s*/, const BasicJsonType& /*context*/, string_t& /*storage*/) const = delete; // NOLINT(hicpp-use-equals-delete,modernize-use-equals-delete): a private helper's guard, not part of the interface
+
     /*!
     @brief write an integer in the shortest encoding
 

tests/CMakeLists.txt

@@ -138,7 +138,8 @@ json_test_set_test_options(test-disabled_exceptions
 # only the #972 regression test needs thirdparty/fifo_map on its include path
 json_test_set_test_options(test-regression1 LINK_LIBRARIES fifo_map_include)
 
-# GCC's false -Warray-bounds error with JSON_DIAGNOSTICS only shows up when optimizing (#5742).
+# Regression test for GCC's false -Warray-bounds error with JSON_DIAGNOSTICS (#5742, fixed in #5585). It only
+# showed up when optimizing, so build this test with -O3 and the warning as an error.
 # -O3 makes the optimizer-driven warnings of the ci_test_gcc flag set (-Winline,
 # -Wsuggest-attribute=...) fire on the library's inline functions; they are not
 # what this test checks, so turn them off for it.

tests/src/custom_object_key_type.hpp

@@ -0,0 +1,75 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <nlohmann/json.hpp>
+
+namespace custom_object_key_test
+{
+class key
+{
+  public:
+    key() = default;
+
+    key(const char* value)
+        : m_value(value)
+    {}
+
+    key(std::string value)
+        : m_value(std::move(value))
+    {}
+
+    operator std::string() const
+    {
+        return m_value;
+    }
+
+    // Required by JSON_DIAGNOSTICS, which reads object keys through data()
+    // when building the path of an exception.
+    const char* data() const noexcept
+    {
+        return m_value.data();
+    }
+
+    friend bool operator<(const key& lhs, const key& rhs)
+    {
+        return lhs.m_value < rhs.m_value;
+    }
+
+  private:
+    std::string m_value;
+};
+
+template<typename Key, typename Value, typename Compare, typename Allocator>
+class object
+    : public std::map <
+      key,
+      Value,
+      std::less<key>, // NOLINT(modernize-use-transparent-functors)
+      typename std::allocator_traits<Allocator>::template rebind_alloc <
+          std::pair<const key, Value >>>
+{
+  private:
+    using allocator_type =
+    typename std::allocator_traits<Allocator>::template rebind_alloc <
+        std::pair<const key, Value >>;
+
+    using base_type =
+        std::map<key, Value, std::less<key>, allocator_type>; // NOLINT(modernize-use-transparent-functors)
+
+  public:
+    using base_type::base_type;
+};
+
+using json = nlohmann::basic_json<object>;
+} // namespace custom_object_key_test

tests/src/unit-allocator.cpp

@@ -370,14 +370,7 @@ TEST_CASE("copy of a deeply nested value survives a failing allocation (#5640)")
 #if !(defined(_ITERATOR_DEBUG_LEVEL) && _ITERATOR_DEBUG_LEVEL > 0)
     SECTION("std::map-backed object_t")
     {
-        using bad_alloc_json = nlohmann::basic_json<std::map,
-              std::vector,
-              std::string,
-              bool,
-              std::int64_t,
-              std::uint64_t,
-              double,
-              nth_alloc_fails_allocator>;
+        using bad_alloc_json = nlohmann::json::with_allocator_t<nth_alloc_fails_allocator>;
 
         check_deep_copy_survives_failing_allocation<bad_alloc_json>(false);
         check_deep_copy_survives_failing_allocation<bad_alloc_json>(true);
@@ -385,14 +378,7 @@ TEST_CASE("copy of a deeply nested value survives a failing allocation (#5640)")
 
     SECTION("ordered_map-backed object_t")
     {
-        using bad_alloc_ordered_json = nlohmann::basic_json<nlohmann::ordered_map,
-              std::vector,
-              std::string,
-              bool,
-              std::int64_t,
-              std::uint64_t,
-              double,
-              nth_alloc_fails_allocator>;
+        using bad_alloc_ordered_json = nlohmann::ordered_json::with_allocator_t<nth_alloc_fails_allocator>;
 
         check_deep_copy_survives_failing_allocation<bad_alloc_ordered_json>(false);
         check_deep_copy_survives_failing_allocation<bad_alloc_ordered_json>(true);
@@ -450,14 +436,7 @@ struct scratch_counting_allocator : std::allocator<T>
 
 TEST_CASE("deep copy uses the provided allocator")
 {
-    using counting_json = nlohmann::basic_json<std::map,
-          std::vector,
-          std::string,
-          bool,
-          std::int64_t,
-          std::uint64_t,
-          double,
-          scratch_counting_allocator>;
+    using counting_json = nlohmann::json::with_allocator_t<scratch_counting_allocator>;
 
     // deeper than the 128 levels the copy constructor descends into, so the
     // innermost objects are copied by the iterative deep copy
@@ -516,14 +495,7 @@ TEST_CASE("converting a deeply nested value from another specialization fails cl
     // the allocator in noexcept constructors, so a failing construction crashes
     // the program there instead of throwing std::bad_alloc. Nothing to check.
 #if !(defined(_MSC_VER) && _MSC_VER < 1910 && defined(_ITERATOR_DEBUG_LEVEL) && _ITERATOR_DEBUG_LEVEL > 0)
-    using countdown_json = nlohmann::basic_json<std::map,
-          std::vector,
-          std::string,
-          bool,
-          std::int64_t,
-          std::uint64_t,
-          double,
-          countdown_allocator>;
+    using countdown_json = nlohmann::json::with_allocator_t<countdown_allocator>;
 
     // deeper than the 128 levels the converting constructor descends into, so
     // that failures land on both sides of the bound - or, built with
@@ -631,14 +603,7 @@ TEST_CASE("destructor performs no allocation, only deallocation")
     // Since that stack could itself throw bad_alloc from inside the
     // noexcept destructor (#5135), destroy() no longer allocates anything:
     // it only ever frees what is already there.
-    using counting_json = nlohmann::basic_json<std::map,
-          std::vector,
-          std::string,
-          bool,
-          std::int64_t,
-          std::uint64_t,
-          double,
-          counting_allocator>;
+    using counting_json = nlohmann::json::with_allocator_t<counting_allocator>;
 
     SECTION("array")
     {
@@ -683,14 +648,7 @@ TEST_CASE("destructor performs no allocation, only deallocation")
 TEST_CASE("a failed allocation leaves the value unchanged")
 {
     // create JSON type using the throwing allocator
-    using my_json = nlohmann::basic_json<std::map,
-          std::vector,
-          std::string,
-          bool,
-          std::int64_t,
-          std::uint64_t,
-          double,
-          my_allocator>;
+    using my_json = nlohmann::json::with_allocator_t<my_allocator>;
 
     // Each of these creates a string, array, object, or binary value. The
     // value must be created before the type is changed: otherwise, a failed

tests/src/unit-binary_formats.cpp

@@ -237,7 +237,7 @@ namespace
 // the binary formats as function pointers for "Binary formats with narrow number types";
 // named functions rather than lambdas, because clang 3.5 cannot convert a lambda
 // to a function pointer in the braced initializer of the format table
-using narrow_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int32_t, std::uint32_t, float>;
+using narrow_json = nlohmann::json::with_integers_t<std::int32_t, std::uint32_t>::with_float_t<float>;
 using bytes = std::vector<std::uint8_t>;
 
 bytes encode_cbor(const json& j)

tests/src/unit-binary_utf8_error_handler.cpp

@@ -12,7 +12,11 @@
 #include <nlohmann/json.hpp>
 using nlohmann::json;
 
+#include <array>
+#include <map>
+#include <memory>
 #include <string>
+#include <utility>
 #include <vector>
 
 namespace
@@ -55,6 +59,53 @@ std::string dump_and_parse(const std::string& raw, eh error_handler)
     return json::parse(json(raw).dump(-1, ' ', false, error_handler)).get<std::string>();
 }
 
+// an object key type that is not string_t, but converts implicitly to it;
+// data() is only used when JSON_DIAGNOSTICS is enabled
+DOCTEST_CLANG_SUPPRESS_WARNING_PUSH
+DOCTEST_CLANG_SUPPRESS_WARNING("-Wunused-member-function")
+class converting_key
+{
+  public:
+    converting_key(const char* s) : m_value(s) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
+    converting_key(std::string s) : m_value(std::move(s)) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
+
+    // the conversion yields a temporary string_t
+    operator std::string() const // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
+    {
+        return m_value;
+    }
+
+    // read by the exception messages when JSON_DIAGNOSTICS is enabled
+    const char* data() const noexcept
+    {
+        return m_value.data();
+    }
+
+    friend bool operator<(const converting_key& lhs, const converting_key& rhs)
+    {
+        return lhs.m_value < rhs.m_value;
+    }
+
+  private:
+    std::string m_value;
+};
+DOCTEST_CLANG_SUPPRESS_WARNING_POP
+
+// ObjectType using converting_key; the Key template argument is ignored
+template<typename Key, typename Value, typename Compare, typename Allocator>
+class converting_key_object : public std::map<converting_key, Value, std::less<converting_key>, // NOLINT(modernize-use-transparent-functors)
+    typename std::allocator_traits<Allocator>::template rebind_alloc<std::pair<const converting_key, Value>>>
+{
+    using base_type = std::map<converting_key, Value, std::less<converting_key>, // NOLINT(modernize-use-transparent-functors)
+                               typename std::allocator_traits<Allocator>::template rebind_alloc<std::pair<const converting_key, Value>>>;
+
+                             public:
+                               using base_type::base_type;
+                               using base_type::operator=;
+};
+
+using converting_key_json = nlohmann::basic_json<converting_key_object>;
+
 } // namespace
 
 TEST_CASE("UTF-8 error_handler for the binary readers and writers")
@@ -370,3 +421,109 @@ TEST_CASE("UTF-8 error_handler for the binary readers and writers")
         CHECK(json::from_bson(bson_bytes)["k"].get<std::string>() == ill_formed_cases()[0].bytes);
     }
 }
+
+// The UBJSON and BJData writers bind the (possibly sanitized) key to a const
+// string_t&. If key_type is not string_t but converts to it, the converted
+// temporary must outlive that reference; this was a use-after-scope found by
+// AddressSanitizer. Keys exceed the small string optimization on purpose.
+TEST_CASE("UBJSON and BJData writers with an object_t whose key_type is not string_t")
+{
+    const std::string long_prefix(70, 'k');
+
+    SECTION("well-formed keys, every error_handler")
+    {
+        const std::string key1 = long_prefix + "-first";
+        const std::string key2 = long_prefix + "-second";
+
+        converting_key_json::object_t o;
+        o.emplace(converting_key(key1), 1);
+        o.emplace(converting_key(key2), "value");
+        const converting_key_json v(std::move(o));
+
+        json expected;
+        expected[key1] = 1;
+        expected[key2] = "value";
+
+        const std::array<std::pair<bool, bool>, 3> combos = {{{false, false}, {true, false}, {true, true}}};
+        for (const auto h : all_handlers())
+        {
+            CAPTURE(static_cast<int>(h))
+            for (const auto& combo : combos)
+            {
+                const bool use_count = combo.first;
+                const bool use_type = combo.second;
+                CAPTURE(use_count)
+                CAPTURE(use_type)
+
+                CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, use_count, use_type, h)) == expected);
+                CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, use_type, json::bjdata_version_t::draft2, h)) == expected);
+                CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, use_type, json::bjdata_version_t::draft3, h)) == expected);
+            }
+        }
+    }
+
+    SECTION("ill-formed keys")
+    {
+        for (const auto& c : ill_formed_cases())
+        {
+            CAPTURE(c.name)
+            const std::string key = long_prefix + c.bytes;
+
+            converting_key_json::object_t o;
+            o.emplace(converting_key(key), 1);
+            const converting_key_json v(std::move(o));
+
+            CHECK_THROWS_AS(converting_key_json::to_ubjson(v, false, false, eh::strict), converting_key_json::type_error&);
+            CHECK_THROWS_AS(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, eh::strict), converting_key_json::type_error&);
+
+            for (const auto h :
+                    {
+                        eh::replace, eh::ignore
+                    })
+            {
+                CAPTURE(static_cast<int>(h))
+                const std::string expected = dump_and_parse(key, h);
+
+                CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, false, false, h)).begin().key() == expected);
+                CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, h)).begin().key() == expected);
+            }
+
+            CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, false, false, eh::keep)).begin().key() == key);
+            CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, eh::keep)).begin().key() == key);
+        }
+    }
+
+    SECTION("nested deeper than the recursion limit")
+    {
+        // wrap the previous value, innermost first
+        converting_key_json v = 42;
+        json expected = 42;
+        for (int i = 199; i >= 0; --i)
+        {
+            const std::string key = "level-" + std::to_string(i) + "-" + std::string(64, 'x');
+
+            converting_key_json::object_t o;
+            o.emplace(converting_key(key), std::move(v));
+            v = converting_key_json(std::move(o));
+
+            json e;
+            e[key] = std::move(expected);
+            expected = std::move(e);
+        }
+
+        for (const auto h : all_handlers())
+        {
+            CAPTURE(static_cast<int>(h))
+            for (const bool use_count :
+                    {
+                        false, true
+                    })
+            {
+                CAPTURE(use_count)
+
+                CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, use_count, false, h)) == expected);
+                CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, false, json::bjdata_version_t::draft2, h)) == expected);
+            }
+        }
+    }
+}

tests/src/unit-bson.cpp

@@ -46,9 +46,7 @@ class huge_binary_t : public std::vector<std::uint8_t>
     }
 };
 
-using huge_binary_json = nlohmann::basic_json <
-                         std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t,
-                         double, std::allocator, nlohmann::adl_serializer, huge_binary_t, void >;
+using huge_binary_json = nlohmann::json::with_binary_t<huge_binary_t>;
 
 // a string type that can be made to report a size beyond INT32_MAX without
 // allocating that much memory, so BSON length overflow can be tested for
@@ -96,9 +94,7 @@ class huge_string_t : public std::string
     bool pretend_huge = false;
 };
 
-using huge_string_json = nlohmann::basic_json <
-                         std::map, std::vector, huge_string_t, bool, std::int64_t, std::uint64_t,
-                         double, std::allocator, nlohmann::adl_serializer, std::vector<std::uint8_t>, void >;
+using huge_string_json = nlohmann::json::with_string_t<huge_string_t>;
 } // namespace
 
 TEST_CASE("BSON")

tests/src/unit-class_lexer.cpp

@@ -17,6 +17,7 @@ using nlohmann::json;
 #include <cstdint> // uint32_t, uint64_t
 #include <cstdlib> // strtod
 #include <cstring> // memcpy
+#include <limits> // numeric_limits
 #include <sstream> // stringstream
 #include <string> // string
 #include <utility> // pair
@@ -891,8 +892,39 @@ TEST_CASE("Eisel-Lemire float conversion")
 
     SECTION("128-bit products and leading zeros")
     {
+        const auto check_product = [](std::uint64_t a, std::uint64_t b)
+        {
+            const auto product = nlohmann::detail::full_multiplication(a, b);
+            CHECK(big_from(product.high, product.low) == big_mul(big_from(0, a), big_from(0, b)));
+        };
+
+        const std::uint64_t max = (std::numeric_limits<std::uint64_t>::max)();
+        const std::array<std::pair<std::uint64_t, std::uint64_t>, 13> edge_cases =
+        {
+            {
+                {0, 0},
+                {0, 1},
+                {1, 1},
+                {1, max},
+                {0xFFFFFFFFu, 0x100000000u},
+                {0x100000000u, 0x100000000u},
+                {0x100000001u, 0x100000001u},
+                {max, max},
+                {max, 2},
+                {0xFFFFFFFF00000000u, 0x100000001u},
+                {0x100000001u, 0xFFFFFFFF00000000u},
+                {max, 1},
+                {2, max},
+            }
+        };
+
+        for (const auto& test : edge_cases)
+        {
+            check_product(test.first, test.second);
+        }
+
         // whichever implementation the compiler gets (with or without a
-        // 128-bit integer type or a builtin)
+        // 128-bit integer type or a builtin / intrinsic)
         std::uint64_t state = 42;
         for (int i = 0; i < 10000; ++i)
         {
@@ -901,8 +933,7 @@ TEST_CASE("Eisel-Lemire float conversion")
             state ^= state << 17u;
             const std::uint64_t a = state;
             const std::uint64_t b = (state * 0x9E3779B97F4A7C15u) >> (i % 64);
-            const auto product = nlohmann::detail::full_multiplication(a, b);
-            CHECK(big_from(product.high, product.low) == big_mul(big_from(0, a), big_from(0, b)));
+            check_product(a, b);
 
             const int k = i % 64;
             const std::uint64_t x = (std::uint64_t{1} << k) | (a & ((std::uint64_t{1} << k) - 1));

tests/src/unit-comparison.cpp

@@ -824,7 +824,7 @@ struct unordered_object_t : std::map<Key, Value, directed_less<Key>, Allocator>
         return !(lhs == rhs);
     }
 };
-using unordered_json = nlohmann::basic_json<unordered_object_t>;
+using unordered_json = nlohmann::json::with_object_t<unordered_object_t>;
 
 // the entries "0" to "9", enumerated in ascending or in descending order
 unordered_json make_unordered_object(const bool descending)
@@ -875,7 +875,7 @@ struct key_case_less
 
 template<class Key, class Value, class /*Compare*/, class Allocator>
 using key_case_map = std::map<Key, Value, key_case_less, Allocator>;
-using key_case_json = nlohmann::basic_json<key_case_map>;
+using key_case_json = nlohmann::json::with_object_t<key_case_map>;
 
 // the innermost value of a chain of single-element arrays
 template<typename Json>
@@ -905,7 +905,7 @@ struct case_insensitive_less
 
 template<class Key, class Value, class /*Compare*/, class Allocator>
 using case_insensitive_map = std::map<Key, Value, case_insensitive_less, Allocator>;
-using ci_json = nlohmann::basic_json<case_insensitive_map>;
+using ci_json = nlohmann::json::with_object_t<case_insensitive_map>;
 } // namespace
 
 TEST_CASE("equality of objects whose entries have no fixed order")

tests/src/unit-custom-array-type.cpp

@@ -22,7 +22,7 @@ namespace
 
 // std::deque has no capacity() member function, which the library only needs
 // to detect a reallocation for JSON_DIAGNOSTICS
-using deque_json = nlohmann::basic_json<std::map, std::deque>;
+using deque_json = nlohmann::json::with_array_t<std::deque>;
 
 // a std::vector whose at() is hidden: the library performs its own bounds
 // check and must not fall back to the container's checked accessor
@@ -39,7 +39,7 @@ class vector_without_at : public std::vector<T, Allocator>
     void at() = delete;
 };
 
-using no_at_json = nlohmann::basic_json<std::map, vector_without_at>;
+using no_at_json = nlohmann::json::with_array_t<vector_without_at>;
 
 } // namespace
 

tests/src/unit-custom-base-class.cpp

@@ -400,20 +400,7 @@ class base_class_with_hidden_members
     std::size_t m_size = 42;
 };
 
-using json_with_hidden_base_members =
-    nlohmann::basic_json <
-    std::map,
-    std::vector,
-    std::string,
-    bool,
-    std::int64_t,
-    std::uint64_t,
-    double,
-    std::allocator,
-    nlohmann::adl_serializer,
-    std::vector<std::uint8_t>,
-    base_class_with_hidden_members
-    >;
+using json_with_hidden_base_members = nlohmann::json::with_base_class_t<base_class_with_hidden_members>;
 
 TEST_CASE("JSON Node as_base_class")
 {
@@ -459,19 +446,7 @@ struct const_member_base
     const int id = 7; // NOLINT(misc-non-private-member-variables-in-classes)
 };
 
-using json_with_const_base = nlohmann::basic_json <
-                             std::map,
-                             std::vector,
-                             std::string,
-                             bool,
-                             std::int64_t,
-                             std::uint64_t,
-                             double,
-                             std::allocator,
-                             nlohmann::adl_serializer,
-                             std::vector<std::uint8_t>,
-                             const_member_base
-                             >;
+using json_with_const_base = nlohmann::json::with_base_class_t<const_member_base>;
 
 // build an array nested @a depth levels deep, with the innermost value 1;
 // every level is constructed (never assigned), since const_member_base does

tests/src/unit-custom-binary-type.cpp

@@ -26,15 +26,11 @@ namespace
 
 // a BinaryType whose value type is signed: the elements must still be
 // processed as the numbers 0..255
-using char_binary_json = nlohmann::basic_json <
-                         std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t,
-                         double, std::allocator, nlohmann::adl_serializer, std::vector<char>, void >;
+using char_binary_json = nlohmann::json::with_binary_t<std::vector<char>>;
 
 #ifdef JSON_HAS_CPP_17
     // a BinaryType whose value type is not an integer type at all
-    using byte_binary_json = nlohmann::basic_json <
-    std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t,
-    double, std::allocator, nlohmann::adl_serializer, std::vector<std::byte>, void >;
+    using byte_binary_json = nlohmann::json::with_binary_t<std::vector<std::byte>>;
 #endif
 
 } // namespace

tests/src/unit-custom-object-key-type.cpp

@@ -0,0 +1,127 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#include "doctest_compatibility.h"
+
+#include <nlohmann/json.hpp>
+
+#include <cstddef>
+#include <string>
+#include <utility>
+
+#include "custom_object_key_type.hpp"
+
+// These tests instantiate a second basic_json specialization. They live in
+// their own file rather than in unit-cbor.cpp and unit-msgpack.cpp to keep
+// those objects below 65535 sections: the MinGW linker stores the section a
+// COMDAT section is associated with in 16 bits, so it misplaces the jump
+// tables of larger objects (see the clang job in windows.yml).
+
+TEST_CASE("CBOR supports custom object key types")
+{
+    using custom_json = custom_object_key_test::json;
+    using custom_key = custom_object_key_test::key;
+
+    custom_json::object_t object;
+    object.emplace(custom_key{"short"}, 1);
+    object.emplace(
+              custom_key{"a key longer than twenty-three characters"},
+              2);
+
+    const custom_json value(std::move(object));
+    const auto encoded = custom_json::to_cbor(value);
+
+    CHECK(nlohmann::json::from_cbor(encoded) == nlohmann::json
+    {
+        {"short", 1},
+        {"a key longer than twenty-three characters", 2}
+    });
+}
+
+TEST_CASE("CBOR supports custom object key types nested deeper than the recursion depth limit")
+{
+    // below detail::recursion_depth_limit(), keys are written by
+    // write_cbor_iterative instead of write_cbor
+    using custom_json = custom_object_key_test::json;
+    using custom_key = custom_object_key_test::key;
+
+    const std::size_t depth = nlohmann::detail::recursion_depth_limit() + 10;
+
+    custom_json value = 1;
+    nlohmann::json expected = 1;
+    for (std::size_t i = 0; i < depth; ++i)
+    {
+        // alternate short keys with ones long enough to need a length byte
+        const std::string name = (i % 2 == 0) ? "k" + std::to_string(i)
+                                 : "a key longer than thirty-one characters " + std::to_string(i);
+
+        custom_json::object_t object;
+        object.emplace(custom_key{name}, std::move(value));
+        value = custom_json(std::move(object));
+
+        nlohmann::json::object_t expected_object;
+        expected_object.emplace(name, std::move(expected));
+        expected = nlohmann::json(std::move(expected_object));
+    }
+
+    const auto encoded = custom_json::to_cbor(value);
+    CHECK(encoded == nlohmann::json::to_cbor(expected));
+    CHECK(nlohmann::json::from_cbor(encoded) == expected);
+}
+
+TEST_CASE("MessagePack supports custom object key types")
+{
+    using custom_json = custom_object_key_test::json;
+    using custom_key = custom_object_key_test::key;
+
+    custom_json::object_t object;
+    object.emplace(custom_key{"short"}, 1);
+    object.emplace(
+              custom_key{"a key longer than thirty-one characters"},
+              2);
+
+    const custom_json value(std::move(object));
+    const auto encoded = custom_json::to_msgpack(value);
+
+    CHECK(nlohmann::json::from_msgpack(encoded) == nlohmann::json
+    {
+        {"short", 1},
+        {"a key longer than thirty-one characters", 2}
+    });
+}
+
+TEST_CASE("MessagePack supports custom object key types nested deeper than the recursion depth limit")
+{
+    // below detail::recursion_depth_limit(), keys are written by
+    // write_msgpack_iterative instead of write_msgpack
+    using custom_json = custom_object_key_test::json;
+    using custom_key = custom_object_key_test::key;
+
+    const std::size_t depth = nlohmann::detail::recursion_depth_limit() + 10;
+
+    custom_json value = 1;
+    nlohmann::json expected = 1;
+    for (std::size_t i = 0; i < depth; ++i)
+    {
+        // alternate short keys with ones long enough to need a length byte
+        const std::string name = (i % 2 == 0) ? "k" + std::to_string(i)
+                                 : "a key longer than thirty-one characters " + std::to_string(i);
+
+        custom_json::object_t object;
+        object.emplace(custom_key{name}, std::move(value));
+        value = custom_json(std::move(object));
+
+        nlohmann::json::object_t expected_object;
+        expected_object.emplace(name, std::move(expected));
+        expected = nlohmann::json(std::move(expected_object));
+    }
+
+    const auto encoded = custom_json::to_msgpack(value);
+    CHECK(encoded == nlohmann::json::to_msgpack(expected));
+    CHECK(nlohmann::json::from_msgpack(encoded) == expected);
+}

tests/src/unit-custom-object-type.cpp

@@ -179,7 +179,7 @@ class no_key_compare_map
     }
 };
 
-using no_key_compare_json = nlohmann::basic_json<no_key_compare_map>;
+using no_key_compare_json = nlohmann::json::with_object_t<no_key_compare_map>;
 
 // An ObjectType whose erase(iterator) returns void rather than the following
 // iterator, as for instance Abseil's hash maps do
@@ -196,7 +196,7 @@ struct void_erase_map : std::map<Key, T, Compare, Allocator>
     }
 };
 
-using void_erase_json = nlohmann::basic_json<void_erase_map>;
+using void_erase_json = nlohmann::json::with_object_t<void_erase_map>;
 
 // wraps an iterator, but only offers the LegacyForwardIterator operations,
 // like the iterators of std::unordered_map and other hash maps
@@ -388,7 +388,7 @@ class forward_only_map
     }
 };
 
-using forward_only_json = nlohmann::basic_json<forward_only_map>;
+using forward_only_json = nlohmann::json::with_object_t<forward_only_map>;
 
 } // namespace
 

tests/src/unit-hash.cpp

@@ -157,13 +157,13 @@ TEST_CASE("hash<nlohmann::json>")
     // the ends of the integer ranges, which equal floats exactly
     const auto int_min = (std::numeric_limits<json::number_integer_t>::min)();
     const auto int_max = (std::numeric_limits<json::number_integer_t>::max)();
-    const auto two_63 = json::number_unsigned_t(1) << 63U;
+    const auto two_63 = static_cast<json::number_unsigned_t>(1) << 63U;
     CHECK(json(int_min) == json(-9223372036854775808.0));
     CHECK(std::hash<json> {}(json(int_min)) == std::hash<json> {}(json(-9223372036854775808.0)));
     CHECK(json(two_63) == json(9223372036854775808.0));
     CHECK(std::hash<json> {}(json(two_63)) == std::hash<json> {}(json(9223372036854775808.0)));
-    CHECK(json(json::number_unsigned_t(int_max)) == json(int_max));
-    CHECK(std::hash<json> {}(json(json::number_unsigned_t(int_max))) == std::hash<json> {}(json(int_max)));
+    CHECK(json(static_cast<json::number_unsigned_t>(int_max)) == json(int_max));
+    CHECK(std::hash<json> {}(json(static_cast<json::number_unsigned_t>(int_max))) == std::hash<json> {}(json(int_max)));
 }
 
 TEST_CASE("hash<nlohmann::ordered_json>")

tests/src/unit-json_pointer.cpp

@@ -939,3 +939,114 @@ TEST_CASE("unescaping keeps a '~' that does not start an escape sequence")
     nlohmann::detail::unescape(s);
     CHECK(s == "~/~");
 }
+
+TEST_CASE("flatten of structured values")
+{
+    SECTION("values nested too deeply for the call stack (#5393)")
+    {
+        // flatten() used to recurse once per nesting level
+        const std::size_t depth = 100000;
+        for (const bool objects :
+                {
+                    false, true
+                })
+        {
+            CAPTURE(objects)
+            std::string text;
+            std::string path;
+            for (std::size_t i = 0; i < depth; ++i)
+            {
+                text += objects ? "{\"a\":" : "[";
+                path += objects ? "/a" : "/0";
+            }
+            text += "0";
+            text += std::string(depth, objects ? '}' : ']');
+            const auto value = json::parse(text);
+
+            const auto flat = value.flatten();
+            REQUIRE(flat.size() == 1);
+            REQUIRE(flat.begin().key().size() == path.size());
+            CHECK(flat.begin().key() == path);
+            CHECK(flat.begin().value() == 0);
+
+            // unflatten() is linear in the depth, so the value roundtrips
+            CHECK(flat.unflatten() == value);
+        }
+    }
+
+    SECTION("unflatten of a deeply nested pointer")
+    {
+        const std::size_t depth = 100000;
+        for (const bool objects :
+                {
+                    false, true
+                })
+        {
+            CAPTURE(objects)
+            std::string path;
+            for (std::size_t i = 0; i < depth; ++i)
+            {
+                path += objects ? "/a" : "/0";
+            }
+
+            json flat = json::object();
+            flat[path] = 1;
+            const json value = flat.unflatten();
+
+            // walk down iteratively
+            std::size_t levels = 0;
+            const json* current = &value;
+            while (objects ? current->is_object() : current->is_array())
+            {
+                REQUIRE(current->size() == 1);
+                current = objects ? &current->at("a") : &current->at(0);
+                ++levels;
+            }
+            CHECK(levels == depth);
+            CHECK(*current == 1);
+        }
+    }
+
+    SECTION("unflatten does not depend on the iteration order")
+    {
+        // the "0" key comes after its sibling in iteration order
+        const nlohmann::ordered_json flat_array = nlohmann::ordered_json::parse(R"({"/a/1": 2, "/a/0": 1})");
+        CHECK(flat_array.unflatten() == nlohmann::ordered_json::parse(R"({"a": [1, 2]})"));
+
+        const nlohmann::ordered_json flat_object = nlohmann::ordered_json::parse(R"({"/b/1": 2})");
+        CHECK(flat_object.unflatten() == nlohmann::ordered_json::parse(R"({"b": {"1": 2}})"));
+    }
+
+    SECTION("objects and arrays interleaved")
+    {
+        const json value =
+        {
+            {"a", {1, {{"b", json::array()}, {"c", json::object()}}, json::array({{{"x~/", {true, nullptr}}}})}},
+            {"a/b", {{"~", 1}}},
+            {"z", "s"}
+        };
+
+        const json expected =
+        {
+            {"/a/0", 1},
+            {"/a/1/b", nullptr},
+            {"/a/1/c", nullptr},
+            {"/a/2/0/x~0~1/0", true},
+            {"/a/2/0/x~0~1/1", nullptr},
+            {"/a~1b/~0", 1},
+            {"/z", "s"}
+        };
+
+        CHECK(value.flatten() == expected);
+    }
+
+    SECTION("order of the entries of an ordered_json")
+    {
+        const auto value = nlohmann::ordered_json::parse(
+                               R"({"z":"s","a/b":{"~":1,"k":[]},"a":[1,{"c":{},"b":[]},[{"x~/":[true,null],"w":2}]]})");
+
+        const auto flat = value.flatten();
+        CHECK(flat.dump() ==
+              R"({"/z":"s","/a~1b/~0":1,"/a~1b/k":null,"/a/0":1,"/a/1/c":null,"/a/1/b":null,"/a/2/0/x~0~1/0":true,"/a/2/0/x~0~1/1":null,"/a/2/0/w":2})");
+    }
+}

tests/src/unit-large_json.cpp

@@ -426,7 +426,7 @@ TEST_CASE("issue #5392 - binary writers on deeply nested values")
     {
         for (std::size_t depth = 120; depth <= 140; ++depth)
         {
-            CAPTURE(depth);
+            CAPTURE(depth)
 
             const json array = nested_array(depth, json(7));
             CHECK(json::from_cbor(json::to_cbor(array)) == array);
@@ -464,7 +464,7 @@ TEST_CASE("issue #5392 - binary writers on deeply nested values")
                     nlohmann::detail::recursion_depth_limit() + 1, nlohmann::detail::recursion_depth_limit() + 2
                 })
         {
-            CAPTURE(depth);
+            CAPTURE(depth)
             const json array = nested_array(depth, json(0));
 
             std::vector<std::uint8_t> expected_cbor(depth, 0x81);
@@ -505,10 +505,22 @@ TEST_CASE("issue #5392 - binary writers on deeply nested values")
         const json discarded_leaf(json::value_t::discarded);
         const json deep_discarded = nested_array(depth, discarded_leaf);
 
-        CHECK_THROWS_WITH_AS(json::to_cbor(deep_discarded), "[json.exception.type_error.321] cannot serialize discarded value to CBOR", json::type_error);
-        CHECK_THROWS_WITH_AS(json::to_msgpack(deep_discarded), "[json.exception.type_error.321] cannot serialize discarded value to MessagePack", json::type_error);
-        CHECK_THROWS_WITH_AS(json::to_ubjson(deep_discarded), "[json.exception.type_error.321] cannot serialize discarded value to UBJSON", json::type_error);
-        CHECK_THROWS_WITH_AS(json::to_bjdata(deep_discarded), "[json.exception.type_error.321] cannot serialize discarded value to BJData", json::type_error);
+        // with diagnostics, the message names the path to the discarded leaf
+#if JSON_DIAGNOSTICS
+        std::string path;
+        for (std::size_t i = 0; i < depth; ++i)
+        {
+            path += "/0";
+        }
+        const std::string prefix = "[json.exception.type_error.321] (" + path + ") ";
+#else
+        const std::string prefix = "[json.exception.type_error.321] ";
+#endif
+
+        CHECK_THROWS_WITH_AS(json::to_cbor(deep_discarded), (prefix + "cannot serialize discarded value to CBOR").c_str(), json::type_error);
+        CHECK_THROWS_WITH_AS(json::to_msgpack(deep_discarded), (prefix + "cannot serialize discarded value to MessagePack").c_str(), json::type_error);
+        CHECK_THROWS_WITH_AS(json::to_ubjson(deep_discarded), (prefix + "cannot serialize discarded value to UBJSON").c_str(), json::type_error);
+        CHECK_THROWS_WITH_AS(json::to_bjdata(deep_discarded), (prefix + "cannot serialize discarded value to BJData").c_str(), json::type_error);
     }
 
     SECTION("does not overflow the C++ stack")

tests/src/unit-locale-cpp.cpp

@@ -172,7 +172,7 @@ TEST_CASE("locale-dependent test (LC_NUMERIC=de_DE)")
             // a floating-point type that is not a float or a double is written
             // with snprintf, whose locale-specific decimal point and thousands
             // separator are undone afterwards
-            using long_double_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, long double>;
+            using long_double_json = nlohmann::json::with_float_t<long double>;
             CHECK(long_double_json(12345.5L).dump() == "12345.5");
             CHECK(long_double_json(1.0L).dump() == "1.0");
             CHECK(long_double_json(-0.25L).dump() == "-0.25");
@@ -272,7 +272,7 @@ TEST_CASE("locale changes between lexer construction and number conversion (#519
     }
     text += "]";
 
-    using long_double_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, long double>;
+    using long_double_json = nlohmann::json::with_float_t<long double>;
 
     // reference values, parsed without a locale switch
     REQUIRE(std::setlocale(LC_NUMERIC, "C") != nullptr);
@@ -432,7 +432,7 @@ TEST_CASE("locale changes during a single dump() (#5709 item 3)")
     // long double on 64-bit Arm, where it is IEEE-754 double) takes the
     // locale-independent to_chars() path instead, and this test is a no-op
     // there.
-    using long_double_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, long double>;
+    using long_double_json = nlohmann::json::with_float_t<long double>;
     using ld_limits = std::numeric_limits<long_double_json::number_float_t>;
     const bool is_ieee_single_or_double =
         (ld_limits::is_iec559 && ld_limits::digits == 24 && ld_limits::max_exponent == 128) ||

tests/src/unit-msgpack.cpp

@@ -2201,10 +2201,7 @@ struct huge_array : std::vector<T, A>
     }
 };
 
-using huge_array_json = nlohmann::basic_json <
-                        std::map, huge_array, std::string, bool, std::int64_t, std::uint64_t,
-                        double, std::allocator, nlohmann::adl_serializer,
-                        std::vector<std::uint8_t>, void >;
+using huge_array_json = nlohmann::json::with_array_t<huge_array>;
 
 TEST_CASE("MessagePack Size above uint32 for array")
 {
@@ -2249,18 +2246,7 @@ template<typename K, typename V,
     }
 };
 
-using huge_object_json = nlohmann::basic_json <
-                         huge_map,
-                         std::vector,
-                         std::string,
-                         bool,
-                         std::int64_t,
-                         std::uint64_t,
-                         double,
-                         std::allocator,
-                         nlohmann::adl_serializer,
-                         std::vector<std::uint8_t>,
-                         void >;
+using huge_object_json = nlohmann::json::with_object_t<huge_map>;
 
 TEST_CASE("MessagePack Size above uint32 for object")
 {
@@ -2295,18 +2281,7 @@ struct huge_string : std::string
     }
 };
 
-using huge_string_json = nlohmann::basic_json <
-                         std::map,
-                         std::vector,
-                         huge_string,
-                         bool,
-                         std::int64_t,
-                         std::uint64_t,
-                         double,
-                         std::allocator,
-                         nlohmann::adl_serializer,
-                         std::vector<std::uint8_t>,
-                         void >;
+using huge_string_json = nlohmann::json::with_string_t<huge_string>;
 
 TEST_CASE("MessagePack Size above uint32 for string")
 {
@@ -2329,18 +2304,7 @@ struct huge_binary : std::vector<std::uint8_t>
     }
 };
 
-using huge_binary_json = nlohmann::basic_json <
-                         std::map,
-                         std::vector,
-                         std::string,
-                         bool,
-                         std::int64_t,
-                         std::uint64_t,
-                         double,
-                         std::allocator,
-                         nlohmann::adl_serializer,
-                         huge_binary,
-                         void >;
+using huge_binary_json = nlohmann::json::with_binary_t<huge_binary>;
 
 TEST_CASE("MessagePack Size above uint32 for binary")
 {
@@ -2390,14 +2354,10 @@ class beyond_uint32_string_t : public std::string
     }
 };
 
-using beyond_uint32_string_json = nlohmann::basic_json <
-                                  std::map, std::vector, beyond_uint32_string_t, bool, std::int64_t, std::uint64_t,
-                                  double, std::allocator, nlohmann::adl_serializer, std::vector<std::uint8_t>, void >;
+using beyond_uint32_string_json = nlohmann::json::with_string_t<beyond_uint32_string_t>;
 #endif
 
-using beyond_uint32_binary_json = nlohmann::basic_json <
-                                  std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t,
-                                  double, std::allocator, nlohmann::adl_serializer, beyond_uint32_binary_t, void >;
+using beyond_uint32_binary_json = nlohmann::json::with_binary_t<beyond_uint32_binary_t>;
 } // namespace
 
 TEST_CASE("MessagePack lengths beyond UINT32_MAX cannot be serialized")
@@ -2432,8 +2392,8 @@ TEST_CASE("MessagePack numbers use the active union member (see #5644)")
     // used to read the union member that was not the active one, writing
     // wrong bytes for some values; std::int64_t/std::uint64_t (the default
     // types, where both members have the same width) were not affected
-    using int32_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int32_t, std::uint64_t, double>;
-    using int16_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int16_t, std::uint64_t, double>;
+    using int32_json = nlohmann::json::with_integers_t<std::int32_t, std::uint64_t>;
+    using int16_json = nlohmann::json::with_integers_t<std::int16_t, std::uint64_t>;
 
     SECTION("number_integer_t = std::int32_t")
     {