Merge branch 'develop' into json-view/02b-float-parser

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Check the URL scheme before downloading in generate_docset.py (#5803 )
2026-10-10 16:37:14 +00:00 · 2026-10-10 16:23:02 +02:00 · 2026-10-10 16:21:53 +02:00 · 2026-10-10 12:50:34 +02:00 · 2026-10-10 11:07:53 +02:00 · 2026-10-10 01:32:41 +02:00
72 changed files with 3488 additions and 1665 deletions
@@ -1,3 +0,0 @@
-# generated files are collapsed in diffs and excluded from language statistics
-single_include/** linguist-generated
-nlohmann_json.natvis linguist-generated
@@ -1,5 +1,5 @@
 # JSON for Modern C++ was originally written by Niels Lohmann.
-# Since 2013, over 400 contributors have helped to improve the library.
+# Since 2013, over 250 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.

@@ -98,7 +98,7 @@ $ ctest --test-dir build -j 10
 The test suite should report:

 ```
-100% tests passed, 0 tests failed out of <number of tests>
+100% tests passed, 0 tests failed out of 98
 ```

 #### Add tests
@@ -157,9 +157,8 @@ and each page's title (H1) and declaration by
 ### 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),
-[`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)
+[`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)
 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:
@@ -182,7 +181,7 @@ 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/develop/README.md) is an excellent starting point to
+- The library’s [README file](https://github.com/nlohmann/json/blob/master/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)
@@ -221,9 +220,9 @@ 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/develop/README.md#supported-compilers) should compile
+[supported C++11 compiler](https://github.com/nlohmann/json/blob/master/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
-C++ 2013 and earlier are known not to work due to missing or incomplete C++11 support.
+Studio 13.0 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.
@@ -239,11 +238,12 @@ 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 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.
+  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.
 - 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.
@@ -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: cpp
+      render: Shell
  - 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 than the
+        the commit hash. If you got the library from another source as the
        GitHub repository (e.g., via a package manager), please also state
        this.
    validations:
@@ -21,17 +21,6 @@ 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/.*"
@@ -83,7 +83,8 @@ 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.
+          # merges to develop, the same way generate_natvis.py's --version
+          # requirement briefly did.
          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"
@@ -116,6 +117,7 @@ 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
@@ -136,13 +138,17 @@ 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
@@ -150,7 +156,7 @@ 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 $MAIN_DIR
+          python3 $NATVIS_TOOL_DIR/generate_natvis.py --version "$VERSION_MAJOR.$VERSION_MINOR.$VERSION_PATCH" $MAIN_DIR

      - name: Build patch and check for differences
        id: diff
@@ -159,7 +165,7 @@ 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, 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:"
+            echo "The source code has not been amalgamated/formatted correctly or BUILD.bazel is out of date. Diff:"
            cat ${{ github.workspace }}/patch/amalgamation.patch
            echo "has_diff=true" >> "$GITHUB_OUTPUT"
          else
@@ -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`, `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`).'
+              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated and/or formatted correctly, or `BUILD.bazel` is out of date.'
                    + (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'
@@ -15,7 +15,6 @@ 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:
@@ -109,7 +109,7 @@ jobs:
    runs-on: ubuntu-latest
    strategy:
      matrix:
-        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]
+        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]
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@e14015d583714f6e62063499dc959a02595150a1 # v2.21.1
@@ -117,7 +117,6 @@ 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:
@@ -280,7 +279,7 @@ jobs:
          persist-credentials: false
      - name: Get latest CMake and ninja
        uses: lukka/get-cmake@fffaaafeea488556c2c12dad60690008bc1caacb # v4.4.2
-      - name: Disable filesystem support (std::filesystem is unusable) for clang 7 / 8 / 9 / 10
+      - name: Set env FORCE_STDCPPFS_FLAG 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
@@ -187,7 +187,7 @@ jobs:
      - name: Test
        run: cd build ; ctest -j 10 -C Debug --output-on-failure

-  clang-cl:
+  clang-cl-12:
    runs-on: windows-2022
    strategy:
      matrix:
@@ -27,6 +27,7 @@
 /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/
@@ -46,17 +47,3 @@ 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
@@ -81,7 +81,6 @@ 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"],
@@ -8,7 +8,7 @@ authors:
    website: https://nlohmann.me
 title: "JSON for Modern C++"
 version: 3.12.0
-date-released: 2025-04-11
+date-released: 2025-04-07
 license: MIT
 repository-code: "https://github.com/nlohmann/json"
 url: https://json.nlohmann.me
@@ -30,7 +30,7 @@ endif ()
 option(NLOHMANN_JSON_BUILD_MODULES "Build C++ modules support" OFF)

 if(NLOHMANN_JSON_BUILD_MODULES)
-    if(NOT CMAKE_VERSION VERSION_LESS 3.28)
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
        message(STATUS "Building nlohmann.json C++ module")
        add_subdirectory(src/modules)
    else()
@@ -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 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.
+- `check_amalgamation.yml` — verify that the single-header amalgamation in `single_include` is up to date on pull requests.
 - `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.
@@ -24,9 +24,7 @@ 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 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.
+- `publish_documentation.yml` — build and publish the documentation on every merge to the `develop` branch.

 Further documentation:

@@ -268,9 +266,8 @@ meson setup builddir
 ninja -C builddir
 ```

-`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`
+`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`
 ([`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.

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

@@ -1,4 +1,4 @@
-.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
+.PHONY: pretty clean ChangeLog.md release update_hedley update_hedley_undef BUILD.bazel natvis macro_builder_check check_build_options

 ##########################################################################
 # configuration
@@ -41,18 +41,12 @@ 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 "(fuzzers) - see tests/fuzzing.md, or run 'make -C tests fuzzers' to build the AFL fuzzers"
+	@echo "fuzzing - see tests/fuzzing.md for how to build and run the 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"

@@ -114,18 +108,13 @@ $(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:
-	@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 .
+	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: install_astyle
+macro_builder_check:
 	@set -e; \
 	TMPDIR=$$(mktemp -d ./macro_builder_check.XXXXXX); \
 	trap 'rm -rf "$$TMPDIR"' EXIT; \
@@ -142,27 +131,27 @@ macro_builder_check: install_astyle
 check_build_options:
 	python3 tools/check_build_options/check_build_options.py .

-# 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 if file single_include/nlohmann/json.hpp has been amalgamated from the nlohmann sources
 check-amalgamation:
-	@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
+	@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

 # generate the Bazel BUILD file; phony, because a removed header would not trigger a rebuild
 BUILD.bazel:
@@ -223,8 +212,8 @@ release: include.zip json.tar.xz

 # clean up
 clean:
-	rm -fr *.dSYM tests/*.dSYM tests/parse_*_fuzzer
-	rm -fr cmake-build-benchmarks cmake-build-pvs-studio release_files
+	rm -fr fuzz fuzz-testing *.dSYM tests/*.dSYM
+	rm -fr cmake-build-benchmarks fuzz-testing cmake-build-pvs-studio release_files
 	$(MAKE) clean -Cdocs


@@ -48,7 +48,6 @@
  - [Pkg-config](#pkg-config)
 - [License](#license)
 - [Contact](#contact)
- [Security](#security)
 - [Thanks](#thanks)
 - [Used third-party tools](#used-third-party-tools)
 - [Notes](#notes)
@@ -113,9 +112,9 @@ 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)
@@ -1185,7 +1184,7 @@ binary[1]; // 0xFE
 binary.set_subtype(0x10);

 // serialize to MessagePack
-auto msgpack = json::to_msgpack(j); // 0xD5 (fixext2), 0x10, 0xCA, 0xFE
+auto cbor = json::to_msgpack(j); // 0xD5 (fixext2), 0x10, 0xCA, 0xFE
 ```

 ## Customers
@@ -1221,7 +1220,17 @@ 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.
- 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`.
+- 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).

 - 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.

@@ -1387,7 +1396,7 @@ THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR I
 - The class contains a slightly modified version of the Grisu2 algorithm from Florian Loitsch which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above). Copyright &copy; 2009 [Florian Loitsch](https://florian.loitsch.com/)
 - The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/).
 - The class contains parts of [Google Abseil](https://github.com/abseil/abseil-cpp) which is licensed under the [Apache 2.0 License](https://opensource.org/licenses/Apache-2.0).
- The class contains an adapted version of the Eisel-Lemire algorithm and its table of powers of five from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors
+- The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, and its digit comparison for long numbers from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors

 <img align="right" src="https://git.fsfe.org/reuse/reuse-ci/raw/branch/master/reuse-horizontal.png" alt="REUSE Software">

@@ -1428,416 +1437,436 @@ 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 and fixed a subtlety in MSVC type support and implemented the `get_ref()` function to get a reference to stored values.
+15. [dariomt](https://github.com/dariomt) fixed some typos in the examples.
 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. [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.
+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.

 Thanks a lot for helping out! Please [let me know](mailto:mail@nlohmann.me) if I forgot someone.

@@ -1850,28 +1879,21 @@ 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
- [**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)
+- [**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)
 - [**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
@@ -1965,10 +1987,10 @@ If the testdata is not found, several test suites will fail like this:

 ```
 ===============================================================================
-json/tests/src/make_test_data_available.hpp:26:
+json/tests/src/make_test_data_available.hpp:21:
 TEST CASE:  check test suite is downloaded

-json/tests/src/make_test_data_available.hpp:28: FATAL ERROR: REQUIRE( utils::check_testsuite_downloaded() ) is NOT correct!
+json/tests/src/make_test_data_available.hpp:23: 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.
@@ -1979,10 +2001,10 @@ json/tests/src/make_test_data_available.hpp:28: 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 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 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 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 `ctest -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 `cmake -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.
@@ -10,10 +10,10 @@ SPDX-FileCopyrightText = "2013-2026 Niels Lohmann <https://nlohmann.me>"
 SPDX-License-Identifier = "MIT"

 [[annotations]]
-path = "include/nlohmann/thirdparty/hedley/hedley.hpp"
+path = "include/nlohmann/thirdparty/hedley.hpp"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2016-2021 Evan Nemerson <evan@nemerson.com>"
-SPDX-License-Identifier = "CC0-1.0"
+SPDX-License-Identifier = "CC0"

 [[annotations]]
 path = "include/nlohmann/detail/meta/cpp_future.hpp"
@@ -50,9 +50,3 @@ 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"
@@ -5,14 +5,15 @@ set(N 10)
 # Needed tools.
 ###############################################################################

+include(FindPython3)
 find_package(Python3 COMPONENTS Interpreter)

-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)
+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++)
 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 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)
+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)
 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})")
@@ -68,7 +69,9 @@ 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(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)
+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)

 # the individual source files
 file(GLOB_RECURSE SRC_FILES ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp)
@@ -364,7 +367,7 @@ 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_TOOL} --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage 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

    COMMENT "Compile and test with coverage"
 )
@@ -389,8 +392,8 @@ 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 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/*).
+# 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.
 file(GLOB_RECURSE INDENT_FILES
    ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.hpp
    ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.cpp
@@ -420,7 +423,7 @@ 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 ${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 ${CMAKE_COMMAND} -P ${PROJECT_SOURCE_DIR}/cmake/scripts/gen_bazel_build_file.cmake

    COMMAND diff ${include_dir}/json.hpp~ ${include_dir}/json.hpp
@@ -431,8 +434,6 @@ 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"
 )
@@ -718,7 +719,7 @@ 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_DisableTupleReferenceConversion JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
+    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})
@@ -775,14 +776,17 @@ add_custom_target(ci_cmake_flags
 # Use more installed compilers.
 ###############################################################################

-foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6)
+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)
    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 ${COMPILER}"
@@ -796,6 +800,7 @@ add_custom_target(ci_test_compiler_default
        -DCMAKE_BUILD_TYPE=Debug -GNinja
        -DJSON_BuildTests=ON -DJSON_FastTests=ON
        -S${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"
@@ -820,10 +825,8 @@ add_custom_target(ci_module_cpp20
    COMMAND ${CMAKE_COMMAND}
        -DCMAKE_BUILD_TYPE=Debug -GNinja 
        -DJSON_CI=ON -DNLOHMANN_JSON_BUILD_MODULES=ON -DJSON_Install=ON
-        "-DCMAKE_CXX_FLAGS=${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
 )

 ###############################################################################
@@ -49,7 +49,6 @@ 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"],
@@ -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 `v3.12.0`):
+using tag `v3.10.2`):

 ```shell
 git clone https://github.com/nlohmann/json.git
 cd json
-git checkout v3.12.0
+git checkout v3.10.2
 make install_venv serve -C docs/mkdocs
 ```

@@ -337,14 +337,17 @@ def is_remote(url) -> bool:
 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)
+    if u.scheme.lower() not in ('http', 'https'):
+        raise ValueError(f'not an http(s) URL: {url}')
    req = urllib.request.Request(u.geturl(), headers={'User-Agent': USER_AGENT})
-    with urllib.request.urlopen(req, timeout=20) as r:
+    # (the scheme is checked above)
+    with urllib.request.urlopen(req, timeout=20) as r:  # nosec B310
        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]
+        digest = hashlib.sha1(url.encode(), usedforsecurity=False).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)
@@ -385,7 +388,8 @@ def localize_images(docs) -> None:
 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)
+        # (Loader is a yaml.SafeLoader)
+        return yaml.load(f, Loader=Loader)  # nosec B506


 def localize_site_urls(docs, site_url) -> None:
@@ -10,10 +10,6 @@ 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 
@@ -21,9 +17,6 @@ bool contains(T) const = delete;
 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

@@ -46,7 +39,6 @@ bool contains(T) const = delete;
   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

@@ -57,7 +49,6 @@ 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

@@ -7,19 +7,12 @@ 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

@@ -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)

@@ -10,21 +10,12 @@ 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

@@ -124,8 +124,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. 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
@@ -110,8 +110,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. 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
@@ -126,8 +126,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. 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
@@ -135,8 +135,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. 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
@@ -127,8 +127,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. 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
@@ -125,8 +125,7 @@ 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. In version 4.0.0, this overload
-      will be deleted (`= delete`) rather than removed. Please replace all calls like
+      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. 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
@@ -62,5 +62,5 @@ same name. Hidden members remain accessible via [`as_base_class`](as_base_class.

 ## Version history

- Added in version 3.11.3.
+- Added in version 3.12.0.
 - Made a public member type in version 3.13.0; it was private before, so it could not be named outside the class.
@@ -23,9 +23,10 @@ type to use.
 ## Template parameters

 `NumberFloatType`
-:   the type to store floating-point numbers. Parsing and serialization are implemented in terms of
-    `#!cpp std::strtof`/`#!cpp std::strtod`/`#!cpp std::strtold` and `#!cpp std::snprintf`, so the type must be
-    `#!cpp float`, `#!cpp double`, or `#!cpp long double`. The
+:   the type to store floating-point numbers. The type must be `#!cpp float`, `#!cpp double`, or
+    `#!cpp long double`. The parser converts `#!cpp float`, `#!cpp double`, and a `#!cpp long double` that is IEEE 754
+    binary64 itself. It converts other `#!cpp long double` formats with `#!cpp std::from_chars` where available, or
+    with `#!cpp std::strtold` otherwise. Serialization falls back to `#!cpp std::snprintf`. The
    [binary formats](../../features/binary_formats/index.md) additionally require `#!cpp float` or `#!cpp double`,
    because they have no encoding for `#!cpp long double`. See
    [Template Parameter Requirements](../../features/types/template_parameters.md#numberfloattype).
@@ -27,7 +27,6 @@ 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
@@ -49,6 +49,6 @@ The default value is detected based on preprocessor macros such as `#!cpp __cplu

 ## Version history

- Added in version 3.10.0.
+- Added in version 3.10.5.
 - Added `JSON_HAS_CPP_23` in version 3.12.0.
 - Added `JSON_HAS_CPP_26` in version 3.13.0.
@@ -1,43 +0,0 @@
-# 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.
@@ -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 #5161](https://github.com/nlohmann/json/issues/5161))
+    - **Clang < 16 with libstdc++** — disabled (incomplete ranges support; [issue #4440](https://github.com/nlohmann/json/issues/4440))
    - **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))
@@ -44,12 +44,9 @@ 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.
@@ -20,10 +20,7 @@ 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
-  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.
+  they always return the bytes unchanged.

 ## Default definition

@@ -190,5 +190,3 @@ 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.
@@ -186,6 +186,3 @@ 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.
@@ -185,6 +185,3 @@ 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.
@@ -38,6 +38,4 @@ the library.

 ## Version history

- 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).
+- Added in version 3.11.0. Changed inline namespace name in version 3.11.2.
@@ -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`:

@@ -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, BON8, BSON, CBOR, MessagePack, UBJSON)
+The primary threat is therefore **untrusted input**: JSON text or binary data (BJData, 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
@@ -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), [`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.
+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.

 - [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 7 exceptions.
+  - On Clang, `-Weverything` is used with 8 exceptions.

    ??? abstract "Clang warnings"

@@ -217,8 +217,7 @@ 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; see
-    [`JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md).
+    to incomplete C++20 ranges support there.

 ## Your own types

@@ -82,45 +82,6 @@ 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`.
@@ -101,9 +101,3 @@ 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.
@@ -82,12 +82,13 @@ flowchart TD

    - Numbers with a decimal digit or scientific notation are always stored as `#!c double`.
    - The number types can be changed, see [Template number types](#template-number-types). 
-    - Integers are converted by the library's own digit parser. Floating-point numbers are converted with
-      [`std::from_chars`](https://en.cppreference.com/w/cpp/utility/from_chars) if the library is compiled with C++17
-      and the standard library supports it, then with an exact fast path for `#!c double` values with few significant
-      digits, and otherwise with the locale-aware
-      [`std::strtod`](https://en.cppreference.com/w/cpp/string/byte/strtof) (`std::strtof`/`std::strtold` for the
-      other floating-point types). Before version 3.13.0, the conversion was realized by
+    - The library converts integers and floating-point numbers itself, independent of the locale. Floating-point
+      numbers are correctly rounded (to nearest, ties to even). Only a `#!c long double` that is not IEEE 754 binary64
+      (e.g., the 80-bit x87 format) is converted with `#!cpp std::from_chars` where available, or else with
+      [`std::strtold`](https://en.cppreference.com/w/cpp/string/byte/strtof). For that call, the library temporarily
+      replaces the `.` with the decimal point of the current locale (which may be longer than one byte, e.g., in
+      `fa_IR.UTF-8`), so the result does not depend on the locale either. Changing the locale in another thread during
+      parsing is undefined behavior of the C library, though. Before version 3.13.0, the conversion was realized by
      [`std::strtoull`](https://en.cppreference.com/w/cpp/string/byte/strtoul),
      [`std::strtoll`](https://en.cppreference.com/w/cpp/string/byte/strtol), and `std::strtod`, respectively.

@@ -100,10 +101,10 @@ flowchart TD
 ### Number limits

 - Any 64-bit signed or unsigned integer can be stored without loss of precision.
- Numbers exceeding the limits of `#!c double` (i.e., numbers that after conversion via
-[`std::strtod`](https://en.cppreference.com/w/cpp/string/byte/strtof) are not satisfying
+- Numbers exceeding the limits of `#!c double` (i.e., numbers whose rounded value is not satisfying
 [`std::isfinite`](https://en.cppreference.com/w/cpp/numeric/math/isfinite) such as `#!c 1E400`) will throw exception
-[`json.exception.out_of_range.406`](../../home/exceptions.md#jsonexceptionout_of_range406) during parsing.
+[`json.exception.out_of_range.406`](../../home/exceptions.md#jsonexceptionout_of_range406) during parsing. Numbers too
+small for `#!c double` (such as `#!c 1E-400`) become zero, with the sign of the number.
 - Floating-point numbers are rounded to the next number representable as `double`. For instance
 `#!c 3.141592653589793238462643383279` is stored as [`0x400921fb54442d18`](https://float.exposed/0x400921fb54442d18).
 This is the same behavior as the code `#!c double x = 3.141592653589793238462643383279;`.
@@ -30,9 +30,9 @@ Requirements are split into two groups:
    diagnosed with dedicated error messages, and violating most of them results in a compiler error somewhere inside
    the library. Four violations are not caught at compile time at all:

-    - A [`StringType`](#stringtype) whose `data()` is not null-terminated compiles and can silently misparse
-      floating-point numbers, because the lexer may hand the buffer to `#!cpp std::strtod`, which reads up to the
-      terminating null character.
+    - A [`StringType`](#stringtype) whose `data()` is not null-terminated compiles and silently misparses numbers
+      stored as a `#!cpp long double` that is not IEEE 754 binary64 (e.g., the 80-bit x87 format), because the lexer
+      hands the buffer to `#!cpp std::strtold`.
    - A stateful [`AllocatorType`](#allocatortype) compiles and silently ignores its state: allocation, deallocation,
      and [`get_allocator()`](../../api/basic_json/get_allocator.md) each use a different default-constructed instance.
    - The two [cross-specialization conversions](#cross-specialization-conversions) below. These abort on an assertion
@@ -353,16 +353,21 @@ using array_t = ArrayType<basic_json, AllocatorType<basic_json>>;
 ### Always required

 - A member type `value_type` that is one byte wide and `char`-compatible. The library stores and processes UTF-8
-  encoded `char` data and passes `data()` to functions that take a `#!cpp const char*`, such as `#!cpp std::strtod`.
+  encoded `char` data and passes `data()` to functions that take a `#!cpp const char*`, such as `#!cpp std::strtold`
+  (only used to parse a `#!cpp long double` that is not IEEE 754 binary64, see
+  [`NumberFloatType`](#numberfloattype)).
  `#!cpp std::wstring`, `#!cpp std::u16string`, and `#!cpp std::u32string` are **not** valid choices; see the FAQ on
  [wide string handling](../../home/faq.md#wide-string-handling).
 - Constructors: default, copy, move, from `#!cpp const char*` (which must not be `#!cpp explicit`), from
  `#!cpp (const char*, size_type)`, and from `#!cpp (size_type, char)`; and copy or move assignment.
 - Member functions `size()`, `clear()`, `resize(n, c)`, `data()`, `push_back(char)`, and `operator[]`
  (const and non-const, returning references). `c_str()` and `back()` are **not** required.
- `data()` must return a pointer to a contiguous, **null-terminated** buffer -- the parser may hand it to
-  `#!cpp std::strtod`, which reads up to the null character. A type whose `data()` is not null-terminated does not
-  fail to compile; it can silently misparse floating-point numbers.
+- `data()` must return a pointer to a contiguous, **null-terminated** buffer. `#!cpp float`, `#!cpp double`, and a
+  `#!cpp long double` that is IEEE 754 binary64 are converted by the library itself and do not depend on this. For any
+  other `NumberFloatType` (a `#!cpp long double` of another format), the parser falls back to `#!cpp std::strtold` when
+  `#!cpp std::from_chars` is not available or declines the token, and `std::strtold` reads up to the null character. A type whose `data()`
+  is not null-terminated does not fail to compile; with such a `NumberFloatType` it can silently misparse
+  floating-point numbers.
 - `append(const char*, size_type)`, used by [`dump`](../../api/basic_json/dump.md), and `append(const StringType&)`,
  used by the CBOR reader for indefinite-length strings. The library's internal string concatenation additionally has
  to append a `#!cpp char` and a `#!cpp const char*`; for each it selects between `append(arg)`, `#!cpp operator+=`,
@@ -541,9 +546,10 @@ therefore silently changes parse results rather than raising an error. See

 `NumberFloatType` must be one of `#!cpp float`, `#!cpp double`, or `#!cpp long double`:

- The [parser](../parsing/index.md) converts number literals with `#!cpp std::from_chars` or, as a fallback, with
-  `#!cpp std::strtof`, `#!cpp std::strtod`, or `#!cpp std::strtold`; the library provides overloads for exactly these
-  three types.
+- The [parser](../parsing/index.md) converts number literals to `#!cpp float`, `#!cpp double`, and a
+  `#!cpp long double` that is IEEE 754 binary64 itself; other `#!cpp long double` formats are converted with
+  `#!cpp std::from_chars` where available, or with `#!cpp std::strtold`. The library provides overloads for exactly
+  these three types.
 - [`dump`](../../api/basic_json/dump.md) falls back to `#!cpp std::snprintf` with the `%g` and `%Lg` conversion
  specifiers, for which the library likewise provides only `#!cpp double` and `#!cpp long double` overloads
  (`#!cpp float` is promoted to `#!cpp double`).
@@ -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, BON8, BSON, CBOR, MessagePack, UBJSON) are read by an input adapter and turned into the same SAX
+- **Binary formats** (BJData, 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.
@@ -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](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).
+- **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).

 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/develop/.github/CONTRIBUTING.md#please-dont) for more information.
+See the [contribution guidelines](https://github.com/nlohmann/json/blob/master/.github/CONTRIBUTING.md#please-dont) for more information.
@@ -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 or of one of the binary formats (BJData, BON8, BSON, CBOR, MessagePack, UBJSON), as well
+can occur during the deserialization of JSON text, CBOR, MessagePack, 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 <https://jsonlint.com> or a tool like [jq](https://jqlang.github.io/jq/).
+    - Paste the input to a JSON validator like <http://jsonlint.com> or a tool like [jq](https://stedolan.github.io/jq/).

 ### json.exception.parse_error.102

@@ -20,4 +20,4 @@ The class contains a slightly modified version of the Grisu2 algorithm from Flor

 The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/).

-The class contains an adapted version of the Eisel-Lemire algorithm and its table of powers of five from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors
+The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, and its digit comparison for long numbers from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors
@@ -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
-  raises the minimum [CMake](../integration/cmake.md) version to 3.5 and supports CMake 4.0.
+  lowers the minimum [CMake](../integration/cmake.md) version to allow CMake 4.0.

 [Full release notes](https://github.com/nlohmann/json/releases/tag/v3.12.0).

@@ -2,8 +2,8 @@ cmake_minimum_required(VERSION 3.15)

 include("cmake/HunterGate.cmake")
 HunterGate(
-    URL "https://github.com/cpp-pm/hunter/archive/v0.26.12.tar.gz"
-    SHA1 "6498c5d0dec25d7fffb2b0574ebaf265179b894d"
+    URL "https://github.com/cpp-pm/hunter/archive/v0.23.297.tar.gz"
+    SHA1 "3319fe6a3b08090df7df98dee75134d68e2ef5a3"
 )

 project(json_example)
@@ -2,30 +2,12 @@

 # 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. 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.
+# fetch the raw Markdown directly instead of parsing rendered HTML.

-import io
 import os
-
-import markdown
-from pymdownx.snippets import SnippetMissingError
+import shutil

 _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):
@@ -40,11 +22,4 @@ 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)
-        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)
+        shutil.copyfile(file.abs_src_path, target)
@@ -1,7 +1,7 @@
 <!-- https://squidfunk.github.io/mkdocs-material/reference/tooltips/#adding-a-glossary -->

 *[ADL]: Argument-dependent lookup
-*[API]: Application Programming Interface
+*[API]: Application Programming Interfaces
 *[ASCII]: American Standard Code for Information Interchange
 *[BDFL]: Benevolent Dictator for Life
 *[BJData]: Binary JData
@@ -299,7 +299,6 @@ 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
@@ -9,8 +9,9 @@
 #pragma once

 #include <cstdint> // uint64_t
-#if !defined(__SIZEOF_INT128__) && defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64))
-    #include <intrin0.h> // __umulh, _umul128
+#include <cstring> // memcpy
+#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64)) && (!defined(__SIZEOF_INT128__) || (!defined(__GNUC__) && !defined(__clang__)))
+    #include <intrin0.h> // __umulh, _umul128, _BitScanForward64, _BitScanReverse64
 #endif

 #include <nlohmann/detail/abi_macros.hpp>
@@ -28,6 +29,10 @@ inline int count_leading_zeros(std::uint64_t x) noexcept
 {
 #if defined(__GNUC__) || defined(__clang__)
    return __builtin_clzll(x);
+#elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64))
+    unsigned long index = 0; // NOLINT(runtime/int): the type _BitScan*64 takes
+    _BitScanReverse64(&index, x);
+    return 63 - static_cast<int>(index);
 #else
    int n = 0;
    for (int shift = 32; shift != 0; shift >>= 1)
@@ -42,6 +47,29 @@ inline int count_leading_zeros(std::uint64_t x) noexcept
 #endif
 }

+/// number of trailing zero bits of x (x != 0)
+inline int count_trailing_zeros(std::uint64_t x) noexcept
+{
+#if defined(__GNUC__) || defined(__clang__)
+    return __builtin_ctzll(x);
+#elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_ARM64))
+    unsigned long index = 0; // NOLINT(runtime/int): the type _BitScan*64 takes
+    _BitScanForward64(&index, x);
+    return static_cast<int>(index);
+#else
+    int n = 0;
+    for (int shift = 32; shift != 0; shift >>= 1)
+    {
+        if ((x << (64 - shift)) == 0)
+        {
+            n += shift;
+            x >>= shift;
+        }
+    }
+    return n;
+#endif
+}
+
 /// the 128-bit product of two 64-bit numbers
 struct uint128_parts
 {
@@ -75,15 +103,26 @@ inline uint128_parts full_multiplication(std::uint64_t a, std::uint64_t b) noexc
 #endif
 }

-/// eight bytes as a little-endian word (compilers fold this into one load on
-/// little-endian targets)
-inline std::uint64_t read_eight_bytes(const char* p) noexcept
+/// eight bytes as a little-endian word (a single load on little-endian targets)
+inline std::uint64_t read_eight_bytes(const unsigned char* b) noexcept
 {
-    const auto* b = reinterpret_cast<const unsigned char*>(p); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
+#if defined(_MSC_VER) || defined(__x86_64__) || defined(__i386__) || (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+    // the byte order already matches (all MSVC targets are little-endian)
+    std::uint64_t result = 0;
+    std::memcpy(&result, b, sizeof(result));
+    return result;
+#else
    return static_cast<std::uint64_t>(b[0]) | (static_cast<std::uint64_t>(b[1]) << 8u)
           | (static_cast<std::uint64_t>(b[2]) << 16u) | (static_cast<std::uint64_t>(b[3]) << 24u)
           | (static_cast<std::uint64_t>(b[4]) << 32u) | (static_cast<std::uint64_t>(b[5]) << 40u)
           | (static_cast<std::uint64_t>(b[6]) << 48u) | (static_cast<std::uint64_t>(b[7]) << 56u);
+#endif
+}
+
+/// eight bytes as a little-endian word
+inline std::uint64_t read_eight_bytes(const char* p) noexcept
+{
+    return read_eight_bytes(reinterpret_cast<const unsigned char*>(p)); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
 }

 }  // namespace detail
@@ -221,6 +221,44 @@ class lexer : public lexer_base<BasicJsonType>
    // scan functions
    /////////////////////

+    /// contiguous input: try to decode the 4 hex digits following `\\u`
+    /// directly from the input buffer via hex_codepoint(), instead of 4 calls
+    /// to get(). On success, advances the adapter and the position counters
+    /// exactly as those 4 get() calls would (a hex digit is never '\n', so
+    /// only the flat counters move) and leaves @a current holding the last of
+    /// the 4 digits, just as the last such get() would; the codepoint is
+    /// written to @a out. Makes no state change and returns false - for a
+    /// pending unget, fewer than 4 remaining bytes, or any of the 4 bytes not
+    /// being a hex digit - so the caller falls back unchanged to the
+    /// per-character loop, which then reports the same diagnostic (stopping
+    /// at the first invalid digit) as before this optimization.
+    bool get_codepoint_bulk(std::true_type /*bulk*/, int& out)
+    {
+        if (next_unget || ia.bulk_remaining() < 4)
+        {
+            return false;
+        }
+        const char_type* const raw = ia.bulk_data();
+        const int codepoint = hex_codepoint(reinterpret_cast<const unsigned char*>(raw));
+        if (codepoint < 0)
+        {
+            return false;
+        }
+        ia.bulk_skip(4);
+        // a hex digit is never a newline, so only the flat counters advance
+        position.chars_read_total += 4;
+        position.chars_read_current_line += 4;
+        current = char_traits<char_type>::to_int_type(raw[3]);
+        out = codepoint;
+        return true;
+    }
+
+    /// streaming input: no bulk fast path
+    bool get_codepoint_bulk(std::false_type /*bulk*/, int& /*out*/) const noexcept
+    {
+        return false;
+    }
+
    /*!
    @brief get codepoint from 4 hex characters following `\\u`

@@ -240,6 +278,14 @@ class lexer : public lexer_base<BasicJsonType>
    {
        // this function only makes sense after reading `\u`
        JSON_ASSERT(current == 'u');
+
+        // contiguous input: decode all 4 hex digits directly from the buffer
+        int fast_codepoint = 0;
+        if (get_codepoint_bulk(std::integral_constant<bool, bulk_scan> {}, fast_codepoint))
+        {
+            return fast_codepoint;
+        }
+
        int codepoint = 0;

        const auto factors = { 12u, 8u, 4u, 0u };
@@ -1044,9 +1090,11 @@ class lexer : public lexer_base<BasicJsonType>
            token_type::parse_error otherwise

    @note The scanner is independent of the current locale: token_buffer
-          always holds `.`. Only the std::strtod fallback of convert_number()
-          depends on the locale, and it looks up the decimal point right
-          before converting (see detail::convert_float_locale_aware()).
+          always holds `.`. The conversion of float and double does not use
+          the locale either. Only the std::strtold fallback of
+          convert_number() for long double formats other than binary64
+          depends on it, and it looks up the decimal point right before
+          converting (see detail::convert_float_locale_aware()).
    */
    token_type scan_number()  // lgtm [cpp/use-of-goto] `goto` is used in this function to implement the number-parsing state machine described above. By design, any finite input will eventually reach the "done" state or return token_type::parse_error. In each intermediate state, 1 byte of the input is appended to the token_buffer vector, and only the already initialized variables token_buffer, number_type, and error_message are manipulated.
    {
@@ -1059,7 +1107,7 @@ class lexer : public lexer_base<BasicJsonType>

        // offset just past the last mantissa byte in token_buffer (i.e. the
        // index of 'e'/'E', or the whole token when there is no exponent).
-        // convert_number() uses it to count significant digits; npos means
+        // convert_number() uses it to split the token; npos means
        // "not seen an exponent yet" and is resolved at scan_number_done
        std::size_t mantissa_end = std::string::npos;

@@ -1389,8 +1437,8 @@ scan_number_done:
    @param[in] mantissa_end  offset just past the last mantissa byte in
                             token_buffer (the index of 'e'/'E', or
                             token_buffer.size() when there is no exponent);
-                             used to skip Clinger's fast path when it cannot
-                             possibly succeed - see detail::mantissa_fits_clinger()
+                             with decimal_point_position, it locates the parts
+                             of a float token without scanning it again
    */
    token_type convert_number(token_type number_type, std::size_t mantissa_end)
    {
@@ -1444,10 +1492,11 @@ scan_number_done:
        }

        // this code is reached if we parse a floating-point number or if an
-        // integer conversion above overflowed. Prefer std::from_chars
-        // (Eisel-Lemire, locale-independent, correctly rounded) when available;
-        // otherwise the exact Clinger fast path (double only); otherwise the
-        // locale-aware strtof/strtod/strtold.
+        // integer conversion above overflowed. float and double (and long
+        // double where it is binary64) are converted by the library itself,
+        // correctly rounded and independent of the locale; other long double
+        // formats use std::from_chars when available, otherwise the
+        // locale-aware strtold.
        if (convert_float_fast(num_begin, num_end, decimal_point_position, mantissa_end, value_float))
        {
            return token_type::value_float;
@@ -22,6 +22,10 @@ namespace detail
 constexpr std::int64_t pow5_128_smallest_power = -342;
 constexpr std::int64_t pow5_128_largest_power = 308;

+// every entry of pow5_128() holds two 64-bit halves of 5^q, one per covered power of 5
+static_assert((pow5_128_largest_power - pow5_128_smallest_power + 1) * 2 == 1302,
+              "pow5_128_smallest_power/pow5_128_largest_power must match the size of the pow5_128() table");
+
 /*!
@brief 128-bit approximations of 5^q for q in [-342, 308]

@@ -8,10 +8,12 @@

 #pragma once

+#include <array> // array
 #include <cstddef> // size_t
-#include <cstdint> // uint64_t
+#include <cstdint> // uint64_t, uint8_t
 #include <cstring> // memcpy

+#include <nlohmann/detail/bit_ops.hpp>
 #include <nlohmann/detail/macro_scope.hpp>

 // Optional SIMD backend for bulk UTF-8 validation. This is an opt-in external
@@ -69,18 +71,12 @@ inline std::size_t find_string_special(const unsigned char* data, std::size_t n)
    std::size_t i = 0;
    for (; i + 8 <= n; i += 8)
    {
-        std::uint64_t word = 0;
-        std::memcpy(&word, data + i, sizeof(word));
-        if (swar_string_special(word) != 0)
+        const std::uint64_t special = swar_string_special(read_eight_bytes(data + i));
+        if (special != 0)
        {
-            // a special byte is in this word; locate it (endian-agnostic)
-            for (std::size_t j = 0; j < 8; ++j)
-            {
-                if (is_string_special(data[i + j]))
-                {
-                    return i + j;
-                }
-            }
+            // the lowest flagged byte is the first special one: the borrows of
+            // the subtractions can only flag bytes above a true hit
+            return i + (static_cast<std::size_t>(count_trailing_zeros(special)) / 8);
        }
    }
    for (; i < n; ++i)
@@ -114,8 +110,7 @@ inline std::size_t find_ascii_copyable_run(const unsigned char* data, std::size_
    std::size_t i = 0;
    for (; i + 8 <= n; i += 8)
    {
-        std::uint64_t v = 0;
-        std::memcpy(&v, data + i, sizeof(v));
+        const std::uint64_t v = read_eight_bytes(data + i);
        const std::uint64_t q = v ^ 0x2222222222222222ull; // '"'  (0x22)
        const std::uint64_t b = v ^ 0x5C5C5C5C5C5C5C5Cull; // '\\' (0x5C)
        const std::uint64_t d = v ^ 0x7F7F7F7F7F7F7F7Full; // DEL  (0x7F)
@@ -126,7 +121,9 @@ inline std::size_t find_ascii_copyable_run(const unsigned char* data, std::size_
                                   | (v & high);               // >= 0x80
        if (stop != 0)
        {
-            break;
+            // the lowest flagged byte is the first one to stop at (see
+            // find_string_special())
+            return i + (static_cast<std::size_t>(count_trailing_zeros(stop)) / 8);
        }
    }
    for (; i < n; ++i)
@@ -253,13 +250,19 @@ inline std::size_t scalar_string_bulk_run(const unsigned char* data, std::size_t
        {
            break; // end of buffer, or a quote/escape/control byte
        }
+        // a run of multi-byte sequences (e.g. CJK text) is validated sequence
+        // by sequence without searching for the next special byte in between
+        do
+        {
            const std::size_t seq = validate_one_utf8(data + pos, n - pos);
            if (seq == 0)
            {
-            break; // ill-formed or truncated: let the byte path diagnose it
+                return pos; // ill-formed or truncated: let the byte path diagnose it
            }
            pos += seq;
        }
+        while (pos < n && data[pos] >= 0x80u);
+    }
    return pos;
 }

@@ -273,8 +276,7 @@ inline std::size_t find_string_delimiter(const unsigned char* data, std::size_t
    std::size_t i = 0;
    for (; i + 8 <= n; i += 8)
    {
-        std::uint64_t v = 0;
-        std::memcpy(&v, data + i, sizeof(v));
+        const std::uint64_t v = read_eight_bytes(data + i);
        const std::uint64_t q = v ^ 0x2222222222222222ull;
        const std::uint64_t b = v ^ 0x5C5C5C5C5C5C5C5Cull;
        const std::uint64_t hit = ((q - ones) & ~q & high)
@@ -282,14 +284,8 @@ inline std::size_t find_string_delimiter(const unsigned char* data, std::size_t
                                  | ((v - 0x2020202020202020ull) & ~v & high);
        if (hit != 0)
        {
-            for (std::size_t j = 0; j < 8; ++j)
-            {
-                const unsigned char c = data[i + j];
-                if (c == '\"' || c == '\\' || c < 0x20u)
-                {
-                    return i + j;
-                }
-            }
+            // the lowest flagged byte is the first delimiter (see find_string_special())
+            return i + (static_cast<std::size_t>(count_trailing_zeros(hit)) / 8);
        }
    }
    for (; i < n; ++i)
@@ -320,5 +316,50 @@ inline std::size_t string_bulk_run(const unsigned char* data, std::size_t n) noe
    return scalar_string_bulk_run(data, n);
 }

+// Decode the 4 hex digits at [data, data+4) - the digits following a `\u`
+// escape - into a codepoint 0x0000..0xFFFF via one table lookup per byte
+// (after yyjson's read_hex_u16), or return -1 if any of the 4 bytes is not a
+// hex digit ('0'..'9', 'A'..'F', 'a'..'f'). The caller must already have
+// checked that 4 bytes are available; used by lexer::get_codepoint()'s
+// contiguous fast path. On -1 it falls back to the byte-at-a-time loop, which
+// stops at the first invalid digit, so the reported error and position are
+// unaffected by this fast path.
+inline int hex_codepoint(const unsigned char* data) noexcept
+{
+    static const std::array<std::uint8_t, 256> hex_digit_table = // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
+    {
+        {
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 00..0F
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 10..1F
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 20..2F
+            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 30..3F ('0'..'9')
+            0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 40..4F ('A'..'F')
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 50..5F
+            0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 60..6F ('a'..'f')
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 70..7F
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 80..8F
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // 90..9F
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // A0..AF
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // B0..BF
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C0..CF
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // D0..DF
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // E0..EF
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF  // F0..FF
+        }
+    };
+
+    const std::uint8_t d0 = hex_digit_table[data[0]];
+    const std::uint8_t d1 = hex_digit_table[data[1]];
+    const std::uint8_t d2 = hex_digit_table[data[2]];
+    const std::uint8_t d3 = hex_digit_table[data[3]];
+    // every valid digit is <= 0xF; the combined OR only exceeds it if at
+    // least one of the four bytes was not a hex digit (looked up as 0xFF)
+    if ((d0 | d1 | d2 | d3) > 0x0F)
+    {
+        return -1;
+    }
+    return (d0 << 12) | (d1 << 8) | (d2 << 4) | d3;
+}
+
 }  // namespace detail
 NLOHMANN_JSON_NAMESPACE_END
@@ -0,0 +1,599 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  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 <array> // array
+#include <cstdint> // uint32_t, uint64_t
+
+// Number tokens that are hard to round correctly, with the IEEE-754 binary64
+// and binary32 bits of their correctly rounded values (ties to even; infinity
+// for an overflow, a signed zero for an underflow).
+//
+// For doubles and floats around 0, the smallest normal number, 1, 2^24, 2^53,
+// 0.1, and the largest finite number, and for random ones, the exact midpoint
+// m to the next number gives: m, m with one unit more and less in the last
+// digit, m with "01" and "0...01" appended, m with trailing zeros, and m cut
+// after 17 to 30 digits (rounded down and up, so that the rounding is decided
+// after the 19th digit), in fixed and exponent notation, 30% of them negative.
+// Tokens longer than 80 characters are left out, except for four of 700 digits
+// and more. Zeros, underflow, overflow, huge exponents, and integers beyond 64
+// bits complete the set. Of the 508 tokens, 134 (as double) and 150 (as
+// float) need the exact comparison with the midpoint (detail::digit_comparison()).
+//
+// The expected bits were computed with exact rational arithmetic in Python
+// (fractions.Fraction) and cross-checked with Python's float(); strtod_l and
+// strtof_l of Apple's libc and of glibc agree. Generated by
+// compact_hard_cases.py 5 (with hard_cases.py), see the pull request that
+// added this file.
+
+namespace float_hard_cases
+{
+
+struct hard_case
+{
+    const char* token;
+    std::uint64_t bits64;
+    std::uint32_t bits32;
+};
+
+inline const std::array<hard_case, 508>& cases()
+{
+    static const std::array<hard_case, 508> table =
+    {
+        {
+            {"-2.4703282292062327e-324", 0x8000000000000000u, 0x80000000u},
+            {"24703282292062328e-340", 0x0000000000000001u, 0x00000000u},
+            {"247032822920623272e-341", 0x0000000000000000u, 0x00000000u},
+            {"-0.2470328229206232721e-323", 0x8000000000000001u, 0x80000000u},
+            {"-0.24703282292062327208e-323", 0x8000000000000000u, 0x80000000u},
+            {"-2.4703282292062327209e-324", 0x8000000000000001u, 0x80000000u},
+            {"2.47032822920623272088e-324", 0x0000000000000000u, 0x00000000u},
+            {"247032822920623272089e-344", 0x0000000000000001u, 0x00000000u},
+            {"-247032822920623272088284396434e-353", 0x8000000000000000u, 0x80000000u},
+            {"0.247032822920623272088284396435e-323", 0x0000000000000001u, 0x00000000u},
+            {"-74109846876186981e-340", 0x8000000000000001u, 0x80000000u},
+            {"0.74109846876186982e-323", 0x0000000000000002u, 0x00000000u},
+            {"-0.7410984687618698162e-323", 0x8000000000000001u, 0x80000000u},
+            {"-7.410984687618698163e-324", 0x8000000000000002u, 0x80000000u},
+            {"7.4109846876186981626e-324", 0x0000000000000001u, 0x00000000u},
+            {"-74109846876186981627e-343", 0x8000000000000002u, 0x80000000u},
+            {"-741098468761869816264e-344", 0x8000000000000001u, 0x80000000u},
+            {"0.741098468761869816265e-323", 0x0000000000000002u, 0x00000000u},
+            {"0.741098468761869816264853189302e-323", 0x0000000000000001u, 0x00000000u},
+            {"-7.41098468761869816264853189303e-324", 0x8000000000000002u, 0x80000000u},
+            {"0.22250738585072006e-307", 0x000FFFFFFFFFFFFEu, 0x00000000u},
+            {"2.2250738585072007e-308", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"2.225073858507200641e-308", 0x000FFFFFFFFFFFFEu, 0x00000000u},
+            {"-2225073858507200642e-326", 0x800FFFFFFFFFFFFFu, 0x80000000u},
+            {"22250738585072006419e-327", 0x000FFFFFFFFFFFFEu, 0x00000000u},
+            {"0.2225073858507200642e-307", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"0.222507385850720064199e-307", 0x000FFFFFFFFFFFFEu, 0x00000000u},
+            {"2.225073858507200642e-308", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"-2.22507385850720064199176395546e-308", 0x800FFFFFFFFFFFFEu, 0x80000000u},
+            {"222507385850720064199176395547e-337", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"-2.2250738585072011e-308", 0x800FFFFFFFFFFFFFu, 0x80000000u},
+            {"-22250738585072012e-324", 0x8010000000000000u, 0x80000000u},
+            {"-2225073858507201136e-326", 0x800FFFFFFFFFFFFFu, 0x80000000u},
+            {"0.2225073858507201137e-307", 0x0010000000000000u, 0x00000000u},
+            {"0.2225073858507201136e-307", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"-2.2250738585072011361e-308", 0x8010000000000000u, 0x80000000u},
+            {"2.22507385850720113605e-308", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"222507385850720113606e-328", 0x0010000000000000u, 0x00000000u},
+            {"22250738585072011360574097967e-336", 0x000FFFFFFFFFFFFFu, 0x00000000u},
+            {"0.222507385850720113605740979671e-307", 0x0010000000000000u, 0x00000000u},
+            {"22250738585072016e-324", 0x0010000000000000u, 0x00000000u},
+            {"0.22250738585072017e-307", 0x0010000000000001u, 0x00000000u},
+            {"0.222507385850720163e-307", 0x0010000000000000u, 0x00000000u},
+            {"2.225073858507201631e-308", 0x0010000000000001u, 0x00000000u},
+            {"-2.2250738585072016301e-308", 0x8010000000000000u, 0x80000000u},
+            {"22250738585072016302e-327", 0x0010000000000001u, 0x00000000u},
+            {"-222507385850720163012e-328", 0x8010000000000000u, 0x80000000u},
+            {"0.222507385850720163013e-307", 0x0010000000000001u, 0x00000000u},
+            {"0.222507385850720163012305563795e-307", 0x0010000000000000u, 0x00000000u},
+            {"-2.22507385850720163012305563796e-308", 0x8010000000000001u, 0x80000000u},
+            {"0.17976931348623156E+309", 0x7FEFFFFFFFFFFFFEu, 0x7F800000u},
+            {"1.7976931348623157e308", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"1.797693134862315608e308", 0x7FEFFFFFFFFFFFFEu, 0x7F800000u},
+            {"-1797693134862315609e290", 0xFFEFFFFFFFFFFFFFu, 0xFF800000u},
+            {"-17976931348623156083e289", 0xFFEFFFFFFFFFFFFEu, 0xFF800000u},
+            {"-0.17976931348623156084E+309", 0xFFEFFFFFFFFFFFFFu, 0xFF800000u},
+            {"0.179769313486231560835E+309", 0x7FEFFFFFFFFFFFFEu, 0x7F800000u},
+            {"-1.79769313486231560836e308", 0xFFEFFFFFFFFFFFFFu, 0xFF800000u},
+            {"1.79769313486231560835325876058e308", 0x7FEFFFFFFFFFFFFEu, 0x7F800000u},
+            {"179769313486231560835325876059e279", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"1.7976931348623158e308", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"17976931348623159e292", 0x7FF0000000000000u, 0x7F800000u},
+            {"1797693134862315807e290", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"0.1797693134862315808E+309", 0x7FF0000000000000u, 0x7F800000u},
+            {"0.17976931348623158079E+309", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"-1.797693134862315808e308", 0xFFF0000000000000u, 0xFF800000u},
+            {"1.79769313486231580793e308", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"179769313486231580794e288", 0x7FF0000000000000u, 0x7F800000u},
+            {"179769313486231580793728971405e279", 0x7FEFFFFFFFFFFFFFu, 0x7F800000u},
+            {"-0.179769313486231580793728971406E+309", 0xFFF0000000000000u, 0xFF800000u},
+            {"100000000000000011102230246251565404236316680908203125e-53", 0x3FF0000000000000u, 0x3F800000u},
+            {"-1.00000000000000011102230246251565404236316680908203126", 0xBFF0000000000001u, 0xBF800000u},
+            {"1.00000000000000011102230246251565404236316680908203124e0", 0x3FF0000000000000u, 0x3F800000u},
+            {"10000000000000001110223024625156540423631668090820312501e-55", 0x3FF0000000000001u, 0x3F800000u},
+            {"1.00000000000000011102230246251565404236316680908203125000000000000000000001", 0x3FF0000000000001u, 0x3F800000u},
+            {"10000000000000001e-16", 0x3FF0000000000000u, 0x3F800000u},
+            {"1.0000000000000002", 0x3FF0000000000001u, 0x3F800000u},
+            {"1.000000000000000111", 0x3FF0000000000000u, 0x3F800000u},
+            {"1.000000000000000112e0", 0x3FF0000000000001u, 0x3F800000u},
+            {"1.000000000000000111e0", 0x3FF0000000000000u, 0x3F800000u},
+            {"-10000000000000001111e-19", 0xBFF0000000000001u, 0xBF800000u},
+            {"-100000000000000011102e-20", 0xBFF0000000000000u, 0xBF800000u},
+            {"-1.00000000000000011103", 0xBFF0000000000001u, 0xBF800000u},
+            {"1.00000000000000011102230246251", 0x3FF0000000000000u, 0x3F800000u},
+            {"1.00000000000000011102230246252e0", 0x3FF0000000000001u, 0x3F800000u},
+            {"-0.999999999999999944488848768742172978818416595458984375", 0xBFF0000000000000u, 0xBF800000u},
+            {"-9.99999999999999944488848768742172978818416595458984376e-1", 0xBFF0000000000000u, 0xBF800000u},
+            {"999999999999999944488848768742172978818416595458984374e-54", 0x3FEFFFFFFFFFFFFFu, 0x3F800000u},
+            {"0.99999999999999994448884876874217297881841659545898437501", 0x3FF0000000000000u, 0x3F800000u},
+            {"9.99999999999999944488848768742172978818416595458984375000000000000000000001e-1", 0x3FF0000000000000u, 0x3F800000u},
+            {"-0.99999999999999994", 0xBFEFFFFFFFFFFFFFu, 0xBF800000u},
+            {"9.9999999999999995e-1", 0x3FF0000000000000u, 0x3F800000u},
+            {"9.999999999999999444e-1", 0x3FEFFFFFFFFFFFFFu, 0x3F800000u},
+            {"9999999999999999445e-19", 0x3FF0000000000000u, 0x3F800000u},
+            {"99999999999999994448e-20", 0x3FEFFFFFFFFFFFFFu, 0x3F800000u},
+            {"-0.99999999999999994449", 0xBFF0000000000000u, 0xBF800000u},
+            {"0.999999999999999944488", 0x3FEFFFFFFFFFFFFFu, 0x3F800000u},
+            {"-9.99999999999999944489e-1", 0xBFF0000000000000u, 0xBF800000u},
+            {"9.99999999999999944488848768742e-1", 0x3FEFFFFFFFFFFFFFu, 0x3F800000u},
+            {"999999999999999944488848768743e-30", 0x3FF0000000000000u, 0x3F800000u},
+            {"-9.007199254740993e15", 0xC340000000000000u, 0xDA000000u},
+            {"9007199254740994e0", 0x4340000000000001u, 0x5A000000u},
+            {"9007199254740992", 0x4340000000000000u, 0x5A000000u},
+            {"9.00719925474099301e15", 0x4340000000000001u, 0x5A000000u},
+            {"9007199254740993000000000000000000001e-21", 0x4340000000000001u, 0x5A000000u},
+            {"-9007199254740993.000000000000000000000000000000", 0xC340000000000000u, 0xDA000000u},
+            {"90071992547409915e-1", 0x4340000000000000u, 0x5A000000u},
+            {"-9007199254740991.6", 0xC340000000000000u, 0xDA000000u},
+            {"9.0071992547409914e15", 0x433FFFFFFFFFFFFFu, 0x5A000000u},
+            {"-9007199254740991501e-3", 0xC340000000000000u, 0xDA000000u},
+            {"9007199254740991.5000000000000000000001", 0x4340000000000000u, 0x5A000000u},
+            {"9.0071992547409915000000000000000000000000000000e15", 0x4340000000000000u, 0x5A000000u},
+            {"0.100000000000000012490009027033011079765856266021728515625", 0x3FB999999999999Au, 0x3DCCCCCDu},
+            {"1.00000000000000012490009027033011079765856266021728515626e-1", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"100000000000000012490009027033011079765856266021728515624e-57", 0x3FB999999999999Au, 0x3DCCCCCDu},
+            {"0.10000000000000001249000902703301107976585626602172851562501", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"0.10000000000000001", 0x3FB999999999999Au, 0x3DCCCCCDu},
+            {"1.0000000000000002e-1", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"-1.000000000000000124e-1", 0xBFB999999999999Au, 0xBDCCCCCDu},
+            {"1000000000000000125e-19", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"-10000000000000001249e-20", 0xBFB999999999999Au, 0xBDCCCCCDu},
+            {"0.1000000000000000125", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"0.10000000000000001249", 0x3FB999999999999Au, 0x3DCCCCCDu},
+            {"1.00000000000000012491e-1", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"1.00000000000000012490009027033e-1", 0x3FB999999999999Au, 0x3DCCCCCDu},
+            {"100000000000000012490009027034e-30", 0x3FB999999999999Bu, 0x3DCCCCCDu},
+            {"2.45134755833537796875e14", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"-245134755833537796876e-6", 0xC2EBDE5C4164D83Au, 0xD75EF2E2u},
+            {"-245134755833537.796874", 0xC2EBDE5C4164D839u, 0xD75EF2E2u},
+            {"2.4513475583353779687501e14", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"245134755833537796875000000000000000000001e-27", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"245134755833537.796875000000000000000000000000000000", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"2.4513475583353779e14", 0x42EBDE5C4164D839u, 0x575EF2E2u},
+            {"2451347558335378e-1", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"2451347558335377968e-4", 0x42EBDE5C4164D839u, 0x575EF2E2u},
+            {"245134755833537.7969", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"245134755833537.79687", 0x42EBDE5C4164D839u, 0x575EF2E2u},
+            {"2.4513475583353779688e14", 0x42EBDE5C4164D83Au, 0x575EF2E2u},
+            {"181510327827821147441864013671875e-23", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"-1815103278.27821147441864013671876", 0xC1DB0C11CB91CE38u, 0xCED8608Eu},
+            {"1.81510327827821147441864013671874e9", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"18151032782782114744186401367187501e-25", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"1815103278.27821147441864013671875000000000000000000001", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"-1.81510327827821147441864013671875000000000000000000000000000000e9", 0xC1DB0C11CB91CE38u, 0xCED8608Eu},
+            {"18151032782782114e-7", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"1815103278.2782115", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"1815103278.278211474", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"-1.815103278278211475e9", 0xC1DB0C11CB91CE38u, 0xCED8608Eu},
+            {"1.8151032782782114744e9", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"-18151032782782114745e-10", 0xC1DB0C11CB91CE38u, 0xCED8608Eu},
+            {"181510327827821147441e-11", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"1815103278.27821147442", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"1815103278.27821147441864013671", 0x41DB0C11CB91CE37u, 0x4ED8608Eu},
+            {"1.81510327827821147441864013672e9", 0x41DB0C11CB91CE38u, 0x4ED8608Eu},
+            {"3809325632181785344", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"3.809325632181785345e18", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"3809325632181785343e0", 0x43CA6EB8BD69FE29u, 0x5E5375C6u},
+            {"3809325632181785344.01", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"3.809325632181785344000000000000000000001e18", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"3809325632181785344000000000000000000000000000000e-30", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"3809325632181785300", 0x43CA6EB8BD69FE29u, 0x5E5375C6u},
+            {"3.8093256321817854e18", 0x43CA6EB8BD69FE2Au, 0x5E5375C6u},
+            {"4.046966549916366943359375e12", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"4046966549916366943359376e-12", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"4046966549916.366943359374", 0x428D7210076CE2EFu, 0x546B9080u},
+            {"4.04696654991636694335937501e12", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"4046966549916366943359375000000000000000000001e-33", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"-4046966549916.366943359375000000000000000000000000000000", 0xC28D7210076CE2F0u, 0xD46B9080u},
+            {"4.0469665499163669e12", 0x428D7210076CE2EFu, 0x546B9080u},
+            {"4046966549916367e-3", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"4046966549916366943e-6", 0x428D7210076CE2EFu, 0x546B9080u},
+            {"4046966549916.366944", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"4046966549916.3669433", 0x428D7210076CE2EFu, 0x546B9080u},
+            {"4.0469665499163669434e12", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"-4.04696654991636694335e12", 0xC28D7210076CE2EFu, 0xD46B9080u},
+            {"404696654991636694336e-8", 0x428D7210076CE2F0u, 0x546B9080u},
+            {"28093802557000874e154", 0x63529C3B77330BDBu, 0x7F800000u},
+            {"0.28093802557000875E+171", 0x63529C3B77330BDCu, 0x7F800000u},
+            {"0.2809380255700087447E+171", 0x63529C3B77330BDBu, 0x7F800000u},
+            {"2.809380255700087448e170", 0x63529C3B77330BDCu, 0x7F800000u},
+            {"2.8093802557000874472e170", 0x63529C3B77330BDBu, 0x7F800000u},
+            {"28093802557000874473e151", 0x63529C3B77330BDCu, 0x7F800000u},
+            {"280938025570008744728e150", 0x63529C3B77330BDBu, 0x7F800000u},
+            {"-0.280938025570008744729E+171", 0xE3529C3B77330BDCu, 0xFF800000u},
+            {"-0.280938025570008744728403667979E+171", 0xE3529C3B77330BDBu, 0xFF800000u},
+            {"2.8093802557000874472840366798e170", 0x63529C3B77330BDCu, 0x7F800000u},
+            {"0.39523280297734525e-154", 0x1FE0F51BF17FD374u, 0x00000000u},
+            {"-3.9523280297734526e-155", 0x9FE0F51BF17FD375u, 0x80000000u},
+            {"3.952328029773452547e-155", 0x1FE0F51BF17FD374u, 0x00000000u},
+            {"3952328029773452548e-173", 0x1FE0F51BF17FD375u, 0x00000000u},
+            {"-39523280297734525478e-174", 0x9FE0F51BF17FD374u, 0x80000000u},
+            {"0.39523280297734525479e-154", 0x1FE0F51BF17FD375u, 0x00000000u},
+            {"-0.395232802977345254787e-154", 0x9FE0F51BF17FD374u, 0x80000000u},
+            {"-3.95232802977345254788e-155", 0x9FE0F51BF17FD375u, 0x80000000u},
+            {"-3.95232802977345254787245825501e-155", 0x9FE0F51BF17FD374u, 0x80000000u},
+            {"395232802977345254787245825502e-184", 0x1FE0F51BF17FD375u, 0x00000000u},
+            {"-1.0790205420931879e-276", 0x86A3209CA6233255u, 0x80000000u},
+            {"-1079020542093188e-291", 0x86A3209CA6233256u, 0x80000000u},
+            {"-1079020542093187947e-294", 0x86A3209CA6233255u, 0x80000000u},
+            {"0.1079020542093187948e-275", 0x06A3209CA6233256u, 0x00000000u},
+            {"0.1079020542093187947e-275", 0x06A3209CA6233255u, 0x00000000u},
+            {"1.0790205420931879471e-276", 0x06A3209CA6233256u, 0x00000000u},
+            {"1.07902054209318794701e-276", 0x06A3209CA6233255u, 0x00000000u},
+            {"-107902054209318794702e-296", 0x86A3209CA6233256u, 0x80000000u},
+            {"107902054209318794701153285302e-305", 0x06A3209CA6233255u, 0x00000000u},
+            {"-0.107902054209318794701153285303e-275", 0x86A3209CA6233256u, 0x80000000u},
+            {"58530471071351308e-228", 0x1413B446E6A16A3Bu, 0x00000000u},
+            {"-0.58530471071351309e-211", 0x9413B446E6A16A3Cu, 0x80000000u},
+            {"0.5853047107135130893e-211", 0x1413B446E6A16A3Bu, 0x00000000u},
+            {"-5.853047107135130894e-212", 0x9413B446E6A16A3Cu, 0x80000000u},
+            {"5.853047107135130893e-212", 0x1413B446E6A16A3Bu, 0x00000000u},
+            {"58530471071351308931e-231", 0x1413B446E6A16A3Cu, 0x00000000u},
+            {"-585304710713513089304e-232", 0x9413B446E6A16A3Bu, 0x80000000u},
+            {"0.585304710713513089305e-211", 0x1413B446E6A16A3Cu, 0x00000000u},
+            {"-0.585304710713513089304248824438e-211", 0x9413B446E6A16A3Bu, 0x80000000u},
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+            {"0.00000000000000018014627239033005156980393746124491372029297053813934326171876", 0x3CA9F63970000000u, 0x254FB1CCu},
+            {"-1.8014627239033005156980393746124491372029297053813934326171874e-16", 0xBCA9F63970000000u, 0xA54FB1CBu},
+            {"1801462723903300515698039374612449137202929705381393432617187501e-79", 0x3CA9F63970000000u, 0x254FB1CCu},
+            {"18014627239033005e-32", 0x3CA9F63970000000u, 0x254FB1CBu},
+            {"0.00000000000000018014627239033006", 0x3CA9F63970000000u, 0x254FB1CCu},
+            {"0.0000000000000001801462723903300515", 0x3CA9F63970000000u, 0x254FB1CBu},
+            {"-1.801462723903300516e-16", 0xBCA9F63970000000u, 0xA54FB1CCu},
+            {"-1.8014627239033005156e-16", 0xBCA9F63970000000u, 0xA54FB1CBu},
+            {"18014627239033005157e-35", 0x3CA9F63970000000u, 0x254FB1CCu},
+            {"180146272390330051569e-36", 0x3CA9F63970000000u, 0x254FB1CBu},
+            {"-0.00000000000000018014627239033005157", 0xBCA9F63970000000u, 0xA54FB1CCu},
+            {"0.000000000000000180146272390330051569803937461", 0x3CA9F63970000000u, 0x254FB1CBu},
+            {"1.80146272390330051569803937462e-16", 0x3CA9F63970000000u, 0x254FB1CCu},
+            {"0.05534819327294826507568359375", 0x3FAC569930000000u, 0x3D62B4CAu},
+            {"-5.534819327294826507568359376e-2", 0xBFAC569930000000u, 0xBD62B4CAu},
+            {"5534819327294826507568359374e-29", 0x3FAC569930000000u, 0x3D62B4C9u},
+            {"-0.0553481932729482650756835937501", 0xBFAC569930000000u, 0xBD62B4CAu},
+            {"5.534819327294826507568359375000000000000000000001e-2", 0x3FAC569930000000u, 0x3D62B4CAu},
+            {"5534819327294826507568359375000000000000000000000000000000e-59", 0x3FAC569930000000u, 0x3D62B4CAu},
+            {"0.055348193272948265", 0x3FAC569930000000u, 0x3D62B4C9u},
+            {"5.5348193272948266e-2", 0x3FAC569930000000u, 0x3D62B4CAu},
+            {"5.534819327294826507e-2", 0x3FAC569930000000u, 0x3D62B4C9u},
+            {"5534819327294826508e-20", 0x3FAC569930000000u, 0x3D62B4CAu},
+            {"55348193272948265075e-21", 0x3FAC569930000000u, 0x3D62B4C9u},
+            {"-0.055348193272948265076", 0xBFAC569930000000u, 0xBD62B4CAu},
+            {"0.0553481932729482650756", 0x3FAC569930000000u, 0x3D62B4C9u},
+            {"-5.53481932729482650757e-2", 0xBFAC569930000000u, 0xBD62B4CAu},
+            {"5.179692133247783258005389047985340416e36", 0x478F2C9450000000u, 0x7C7964A2u},
+            {"5179692133247783258005389047985340417e0", 0x478F2C9450000000u, 0x7C7964A3u},
+            {"5179692133247783258005389047985340415", 0x478F2C9450000000u, 0x7C7964A2u},
+            {"-5.17969213324778325800538904798534041601e36", 0xC78F2C9450000000u, 0xFC7964A3u},
+            {"-5179692133247783258005389047985340416000000000000000000001e-21", 0xC78F2C9450000000u, 0xFC7964A3u},
+            {"-5179692133247783258005389047985340416.000000000000000000000000000000", 0xC78F2C9450000000u, 0xFC7964A2u},
+            {"5.1796921332477832e36", 0x478F2C9450000000u, 0x7C7964A2u},
+            {"51796921332477833e20", 0x478F2C9450000000u, 0x7C7964A3u},
+            {"-5179692133247783258e18", 0xC78F2C9450000000u, 0xFC7964A2u},
+            {"5179692133247783259000000000000000000", 0x478F2C9450000000u, 0x7C7964A3u},
+            {"5179692133247783258000000000000000000", 0x478F2C9450000000u, 0x7C7964A2u},
+            {"5.1796921332477832581e36", 0x478F2C9450000000u, 0x7C7964A3u},
+            {"-5.179692133247783258e36", 0xC78F2C9450000000u, 0xFC7964A2u},
+            {"-517969213324778325801e16", 0xC78F2C9450000000u, 0xFC7964A3u},
+            {"517969213324778325800538904798e7", 0x478F2C9450000000u, 0x7C7964A2u},
+            {"5179692133247783258005389047990000000", 0x478F2C9450000000u, 0x7C7964A3u},
+            {
+                "0.22250738585072011360574097967091319759348195463516456480234261097248222220210769455165295239081350"
+                "8791414915891303962110687008643869459464552765720740782062174337998814106326732925355228688137214901"
+                "2981122451451889849057222307285255133155755015914397476397983411801999323962548289017107081850690630"
+                "6666559949382757725720157630626906633326475653000092458883164330377797918696120494973903778297049050"
+                "5108060994073026293712895895000358379996720725430436028407889577179615094551674824347103070260914462"
+                "1572289880258182545180325707018860872113128079512233426288368622321503775666622503982534335974568884"
+                "4239002654981983854879482922068947216898310996983658468140228542433306603398508864458040010349339704"
+                "2756718644338377048603786162277173854562306587467901408672332763671875e-307", 0x0010000000000000u, 0x00000000u
+            },
+            {
+                "2.22507385850720113605740979670913197593481954635164564802342610972482222202107694551652952390813508"
+                "7914149158913039621106870086438694594645527657207407820621743379988141063267329253552286881372149012"
+                "9811224514518898490572223072852551331557550159143974763979834118019993239625482890171070818506906306"
+                "6665599493827577257201576306269066333264756530000924588831643303777979186961204949739037782970490505"
+                "1080609940730262937128958950003583799967207254304360284078895771796150945516748243471030702609144621"
+                "5722898802581825451803257070188608721131280795122334262883686223215037756666225039825343359745688844"
+                "2390026549819838548794829220689472168983109969836584681402285424333066033985088644580400103493397042"
+                "756718644338377048603786162277173854562306587467901408672332763671875000000000000000000001e-308", 0x0010000000000000u, 0x00000000u
+            },
+            {
+                "0.11754942807573642917278829910357665133228589927589904276829631184250030649651730385585324256680905"
+                "8189392089843750000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "00000000000000000000000000000000000000000000000000000000000000000e-37", 0x380FFFFFE0000000u, 0x00800000u
+            },
+            {
+                "1175494280757364291727882991035766513322858992758990427682963118425003064965173038558532425668090581"
+                "8939208984375000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
+                "00000000000001e-751", 0x380FFFFFE0000000u, 0x00800000u
+            },
+            {"0", 0x0000000000000000u, 0x00000000u},
+            {"-0", 0x8000000000000000u, 0x80000000u},
+            {"0.0", 0x0000000000000000u, 0x00000000u},
+            {"-0.0", 0x8000000000000000u, 0x80000000u},
+            {"0e999999999999999999999", 0x0000000000000000u, 0x00000000u},
+            {"-0.000e-99999", 0x8000000000000000u, 0x80000000u},
+            {"1e-400", 0x0000000000000000u, 0x00000000u},
+            {"-1e-400", 0x8000000000000000u, 0x80000000u},
+            {"1e400", 0x7FF0000000000000u, 0x7F800000u},
+            {"-1e400", 0xFFF0000000000000u, 0xFF800000u},
+            {"1e-50", 0x358DEE7A4AD4B81Fu, 0x00000000u},
+            {"-1e-50", 0xB58DEE7A4AD4B81Fu, 0x80000000u},
+            {"1e39", 0x48078287F49C4A1Du, 0x7F800000u},
+            {"-1e39", 0xC8078287F49C4A1Du, 0xFF800000u},
+            {"1e99999999999999999999999999", 0x7FF0000000000000u, 0x7F800000u},
+            {"1e-99999999999999999999999999", 0x0000000000000000u, 0x00000000u},
+            {"1e0000000000000000000000000000000000000000308", 0x7FE1CCF385EBC8A0u, 0x7F800000u},
+            {"123456789012345678901234567890e-30", 0x3FBF9ADD3746F65Fu, 0x3DFCD6EAu},
+            {"18446744073709551615", 0x43F0000000000000u, 0x5F800000u},
+            {"18446744073709551616", 0x43F0000000000000u, 0x5F800000u},
+            {"-9223372036854775808", 0xC3E0000000000000u, 0xDF000000u},
+            {"-9223372036854775809", 0xC3E0000000000000u, 0xDF000000u},
+        }
+    };
+    return table;
+}
+
+} // namespace float_hard_cases
@@ -13,16 +13,20 @@
 using nlohmann::json;

 #include <array> // array
-#include <cfloat> // FLT_EVAL_METHOD
 #include <cstdint> // uint32_t, uint64_t
+#include <cstdio> // snprintf
 #include <cstdlib> // strtod
 #include <cstring> // memcpy
 #include <limits> // numeric_limits
+#include <map> // map
+#include <random> // mt19937
 #include <sstream> // stringstream
 #include <string> // string
 #include <utility> // pair
 #include <vector> // vector

+#include "float_hard_cases.hpp"
+
 namespace
 {
 // shortcut to scan a string literal
@@ -258,7 +262,7 @@ TEST_CASE("lexer number fast path")
            "123456789012345678901234567890",  // huge -> float
            "0.30000000000000004", "2.2250738585072014e-308", "1e308",
            // high-precision / wide-exponent values that exercise the
-            // std::from_chars (Eisel-Lemire) path beyond the Clinger subset
+            // Eisel-Lemire path beyond the Clinger subset
            "1.7976931348623157e308", "1.2345678901234567e-250",
            "9007199254740993", "5e-324", "1e-320"
        };
@@ -280,20 +284,18 @@ TEST_CASE("lexer number fast path")
        }
    }

-    SECTION("significant-digit gate for the Clinger fast path")
+    SECTION("significant digits around Clinger's fast path")
    {
-        // Clinger's fast path needs a significand below 2^53, so it cannot
-        // succeed once the mantissa has 17 or more significant digits (the
-        // significand would be at least 10^16). The lexer skips the attempt
-        // there. That is only allowed to save work: every value must still come
-        // out bit-exactly, and both scanners must agree. In particular the gate
-        // must not fire for tokens whose leading zeros merely look like extra
-        // digits - "0.1234567890123456" has 16 significant digits, not 17.
+        // Clinger's fast path needs a significand of at most 2^53, which
+        // tokens with 17 or more significant digits exceed. The conversion
+        // splits the token at the positions the scanners recorded, so leading
+        // zeros must not count as digits - "0.1234567890123456" has 16
+        // significant digits, not 17 - and both scanners must agree.
        const std::vector<std::string> numbers =
        {
            "1234567890123456",                  // 16 significant digits
-            "12345678901234567",                 // 17 -> attempt skipped
-            "123456789012345678",                // 18 -> attempt skipped
+            "12345678901234567",                 // 17
+            "123456789012345678",                // 18
            "0.1234567890123456",                // 16: the leading "0" is not significant
            "0.12345678901234567",               // 17
            "0.00000000000000001",               // 1, in a long token
@@ -664,46 +666,323 @@ TEST_CASE("lexer string fast path")
    }
 }

-TEST_CASE("parse_float_fast declines what it cannot convert exactly")
+TEST_CASE("lexer escape fast path")
 {
-    // The lexer only hands well-formed numbers to parse_float_fast, so the
-    // malformed ones below can only be passed to it directly. Declining is
-    // always safe: the caller then falls back to a slower, exact conversion.
-    const auto fast = [](const std::string & s, double & out)
+    // json::accept() never throws, so this section stays covered without
+    // exceptions; it pins which of the cases below are valid/invalid and
+    // checks the contiguous and streaming paths agree on that classification.
+    SECTION("accept() parity")
    {
-        return nlohmann::detail::parse_float_fast(s.data(), s.data() + s.size(), out);
+        const std::vector<std::pair<std::string, bool>> cases =
+        {
+            {"\\u0041", true}, {"\\u00e4", true}, {"\\u00E4", true},
+            {"\\uD83D\\uDE00", true},
+            {"\\u12", false}, {"\\u12G4", false}, {"\\uXYZW", false},
+            {"\\uD800", false}, {"\\uD800A", false}, {"\\uD800\\u0041", false},
+            {"\\uDC00", false}, {"\\u", false}
        };
-    double out = 0;

-#if defined(FLT_EVAL_METHOD) && FLT_EVAL_METHOD != 0
-    // without true double precision, the fast path declines everything
-    CHECK_FALSE(fast("1.5", out));
-#else
-    CHECK(fast("1.5", out));
-    CHECK(out == 1.5);
-    CHECK(fast("+2.5e1", out));
-    CHECK(out == 25.0);
-    CHECK(fast("-25E-1", out));
-    CHECK(out == -2.5);
-    CHECK(fast("1e", out));
-    CHECK(out == 1.0);
+        for (const auto& c : cases)
+        {
+            for (const std::size_t offset :
+                    {
+                        std::size_t{0}, std::size_t{9}
+                    })
+            {
+                const std::string doc = "[\"" + std::string(offset, 'a') + c.first + "\"]";
+                CAPTURE(doc)
+                CHECK(json::accept(doc) == c.second);
+                std::stringstream ss(doc);
+                CHECK(json::accept(ss) == c.second);
+            }
+        }
+    }
+
+#if !defined(JSON_NOEXCEPTION)
+    // the full outcome of parsing @a doc: the parsed value, or the exact
+    // error message, so a mismatch in either is caught
+    const auto outcome = [](const std::string & doc, bool streaming) -> std::string
+    {
+        try
+        {
+            if (streaming)
+            {
+                std::stringstream ss(doc);
+                const json j = json::parse(ss);
+                return j.dump();
+            }
+            const json j = json::parse(doc);
+            return j.dump();
+        }
+        catch (const json::exception& e)
+        {
+            return {e.what()};
+        }
+    };
+
+    SECTION("contiguous vs streaming parity")
+    {
+        const std::vector<std::string> escapes =
+        {
+            "\\u0041",             // "A"
+            "\\u00e4",             // "ä" (lowercase hex)
+            "\\u00E4",             // "ä" (uppercase hex)
+            "\\uD83D\\uDE00",      // valid surrogate pair (an emoji)
+            "\\u12",               // truncated: only 2 hex digits before the closing quote
+            "\\u12G4",             // invalid hex digit at the 3rd position
+            "\\uXYZW",             // all 4 bytes invalid
+            "\\uD800",             // lone high surrogate, string ends right after
+            "\\uD800A",            // high surrogate not followed by another \u escape
+            "\\uD800\\u0041",      // high surrogate followed by \u, but not a low surrogate
+            "\\uDC00",             // lone low surrogate
+            "\\u",                 // '\u' with nothing after (closing quote right away)
+        };
+
+        // once at the start of the string and once past the first 8-byte SWAR
+        // word of the outer string_bulk_run, so the escape is reached both
+        // right after the opening quote and mid-run
+        for (const auto& escape : escapes)
+        {
+            for (const std::size_t offset :
+                    {
+                        std::size_t{0}, std::size_t{9}
+                    })
+            {
+                const std::string doc = "[\"" + std::string(offset, 'a') + escape + "\"]";
+                CAPTURE(doc)
+                CHECK(outcome(doc, false) == outcome(doc, true));
+            }
+
+            // the escape is the last thing before end of input: no closing
+            // quote at all
+            const std::string truncated_doc = "[\"" + escape;
+            CAPTURE(truncated_doc)
+            CHECK(outcome(truncated_doc, false) == outcome(truncated_doc, true));
+        }
+    }
+
+    SECTION("truncated \\u escape at every distance from the end of input")
+    {
+        // ia.bulk_remaining() must correctly report fewer than 4 bytes for
+        // every possible count of trailing hex-looking bytes (0, 1, 2, or 3)
+        // before end of input, so the fast path declines and the byte path
+        // alone reports the "must be followed by 4 hex digits" error, at the
+        // same position, in every case
+        for (const std::string& tail :
+                {
+                    std::string{}, std::string("1"), std::string("12"), std::string("123")
+                })
+        {
+            const std::string doc = "[\"\\u" + tail;
+            CAPTURE(doc)
+            CHECK(outcome(doc, false) == outcome(doc, true));
+            CHECK(outcome(doc, false).find("must be followed by 4 hex digits") != std::string::npos);
+        }
+    }
+
+    SECTION("invalid hex digit at every position of the 4")
+    {
+        // the fast path must decline for *any* invalid byte among the 4, not
+        // just the first, and the byte path must then stop at exactly that
+        // position - same as it always has
+        for (std::size_t bad_pos = 0; bad_pos < 4; ++bad_pos)
+        {
+            std::string digits = "1234";
+            digits[bad_pos] = 'g'; // not a hex digit
+            const std::string doc = "[\"\\u" + digits + "\"]";
+            CAPTURE(doc)
+            CHECK(outcome(doc, false) == outcome(doc, true));
+            CHECK(outcome(doc, false).find("must be followed by 4 hex digits") != std::string::npos);
+        }
+    }
+
+    SECTION("random escapes")
+    {
+        // A seeded PRNG builds the 4 bytes following `\u` from a mix of hex
+        // digits and non-hex bytes, at varying distances from the start of
+        // the string, to compare the two scanners on many more shapes than
+        // are practical to enumerate by hand.
+        std::mt19937 gen(7654321); // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed)
+        const std::string hex_alphabet = "0123456789AaBbCcDdEeFf";
+        std::uniform_int_distribution<std::size_t> pick_hex(0, hex_alphabet.size() - 1);
+        std::uniform_int_distribution<int> pick_byte(1, 255); // never NUL
+        std::uniform_int_distribution<int> pick_is_hex(0, 4); // 4-in-5 chance of a hex digit
+        std::uniform_int_distribution<std::size_t> pick_offset(0, 12);
+
+        std::vector<std::string> mismatches;
+        for (int iter = 0; iter < 3000; ++iter)
+        {
+            std::string digits;
+            for (int i = 0; i < 4; ++i)
+            {
+                if (pick_is_hex(gen) != 0)
+                {
+                    digits += hex_alphabet[pick_hex(gen)];
+                }
+                else
+                {
+                    char c = static_cast<char>(pick_byte(gen));
+                    if (c == '"' || c == '\\')
+                    {
+                        // keep the string well-formed apart from the escape
+                        // itself, so any mismatch is attributable to the \u
+                        // handling and not to an unrelated quote/escape
+                        c = 'z';
+                    }
+                    digits += c;
+                }
+            }
+            const std::string doc = "[\"" + std::string(pick_offset(gen), 'a') + "\\u" + digits + "\"]";
+            if (outcome(doc, false) != outcome(doc, true))
+            {
+                mismatches.push_back(doc);
+            }
+        }
+        CAPTURE(mismatches)
+        CHECK(mismatches.empty());
+    }
 #endif
+}

-    // not a number
-    CHECK_FALSE(fast("", out));
-    CHECK_FALSE(fast("-", out));
-    CHECK_FALSE(fast(".", out));
-    CHECK_FALSE(fast("1.2.3", out));
-    CHECK_FALSE(fast("1x", out));
-    CHECK_FALSE(fast("1e+", out));
-    CHECK_FALSE(fast("1e1x", out));
+namespace
+{
+// the index of the decimal point (or npos) and of the end of the mantissa of a
+// number token, which the lexer records while scanning it
+std::pair<std::size_t, std::size_t> float_token_layout(const std::string& s)
+{
+    std::size_t dot = std::string::npos;
+    std::size_t mantissa_end = s.size();
+    for (std::size_t i = 0; i < s.size(); ++i)
+    {
+        if (s[i] == '.')
+        {
+            dot = i;
+        }
+        else if (s[i] == 'e' || s[i] == 'E')
+        {
+            mantissa_end = i;
+            break;
+        }
+    }
+    return {dot, mantissa_end};
+}

-    // numbers that are not represented exactly on the fast path
-    CHECK_FALSE(fast("12345678901234567890", out));
-    CHECK_FALSE(fast("1e10000", out));
-    CHECK_FALSE(fast("9007199254740993", out));
-    CHECK_FALSE(fast("1e23", out));
-    CHECK_FALSE(fast("1e-23", out));
+template<typename FloatType>
+FloatType parse_native(const std::string& s)
+{
+    const auto layout = float_token_layout(s);
+    return nlohmann::detail::parse_float_native<FloatType>(s.data(), s.data() + s.size(), layout.first, layout.second);
+}
+
+std::uint64_t bits_of(double d)
+{
+    std::uint64_t b = 0;
+    std::memcpy(&b, &d, sizeof(b));
+    return b;
+}
+
+std::uint32_t bits_of(float f)
+{
+    std::uint32_t b = 0;
+    std::memcpy(&b, &f, sizeof(b));
+    return b;
+}
+
+std::uint64_t native_bits64(const std::string& s)
+{
+    return bits_of(parse_native<double>(s));
+}
+
+std::uint32_t native_bits32(const std::string& s)
+{
+    return bits_of(parse_native<float>(s));
+}
+} // namespace
+
+TEST_CASE("parse_float_native rounds correctly")
+{
+    SECTION("double")
+    {
+        CHECK(native_bits64("1.5") == 0x3FF8000000000000u);
+        CHECK(native_bits64("0.1") == 0x3FB999999999999Au);
+        CHECK(native_bits64("-0.0") == 0x8000000000000000u);
+        CHECK(native_bits64("0e999999999999999999999") == 0u);
+        // 2^53 + 1 is exactly between two doubles: ties to even, unless more digits follow
+        CHECK(native_bits64("9007199254740993") == 0x4340000000000000u);
+        CHECK(native_bits64("9007199254740993.0000000000000000001") == 0x4340000000000001u);
+        CHECK(native_bits64("9007199254740992.9999999999999999999") == 0x4340000000000000u);
+        // 1 + 2^-53 exactly (a tie), and one unit in the 55th digit around it
+        CHECK(native_bits64("1.00000000000000011102230246251565404236316680908203125") == 0x3FF0000000000000u);
+        CHECK(native_bits64("1.00000000000000011102230246251565404236316680908203126") == 0x3FF0000000000001u);
+        CHECK(native_bits64("1.00000000000000011102230246251565404236316680908203124") == 0x3FF0000000000000u);
+        // subnormal and overflow boundaries
+        CHECK(native_bits64("2.4703282292062327e-324") == 0u);
+        CHECK(native_bits64("2.4703282292062328e-324") == 1u);
+        CHECK(native_bits64("2.2250738585072011e-308") == 0x000FFFFFFFFFFFFFu);
+        CHECK(native_bits64("2.2250738585072012e-308") == 0x0010000000000000u);
+        CHECK(native_bits64("1.7976931348623157e308") == 0x7FEFFFFFFFFFFFFFu);
+        CHECK(native_bits64("1.7976931348623159e308") == 0x7FF0000000000000u);
+        CHECK(native_bits64("-1e400") == 0xFFF0000000000000u);
+        CHECK(native_bits64("-1e-400") == 0x8000000000000000u);
+        // exponents and zeros far beyond the range cancel out
+        CHECK(native_bits64("0." + std::string(1000, '0') + "1e1001") == 0x3FF0000000000000u);
+        CHECK(native_bits64("1" + std::string(1000, '0') + "e-1000") == 0x3FF0000000000000u);
+        CHECK(native_bits64("1e-99999999999999999999999") == 0u);
+        CHECK(native_bits64("1E+99999999999999999999999") == 0x7FF0000000000000u);
+        // more digits than any midpoint has (769): only whether a nonzero digit follows matters
+        const std::string tie = "1.00000000000000011102230246251565404236316680908203125";
+        CHECK(native_bits64(tie + std::string(800, '0')) == 0x3FF0000000000000u);
+        CHECK(native_bits64(tie + std::string(800, '0') + "1") == 0x3FF0000000000001u);
+    }
+
+    SECTION("float")
+    {
+        CHECK(native_bits32("1.5") == 0x3FC00000u);
+        CHECK(native_bits32("0.1") == 0x3DCCCCCDu);
+        CHECK(native_bits32("-0.0") == 0x80000000u);
+        // 2^24 + 1 is exactly between two floats
+        CHECK(native_bits32("16777217") == 0x4B800000u);
+        CHECK(native_bits32("16777217.000000000000000000001") == 0x4B800001u);
+        CHECK(native_bits32("16777218.999999999999999999999") == 0x4B800001u);
+        CHECK(native_bits32("16777219") == 0x4B800002u);
+        // subnormal and overflow boundaries
+        CHECK(native_bits32("3.4028235677973366e38") == 0x7F7FFFFFu);
+        CHECK(native_bits32("3.4028235677973367e38") == 0x7F800000u);
+        CHECK(native_bits32("7.006492321624085e-46") == 0u);
+        CHECK(native_bits32("7.006492321624086e-46") == 1u);
+        CHECK(native_bits32("1.1754942e-38") == 0x007FFFFFu);
+        CHECK(native_bits32("-1.17549435e-38") == 0x80800000u);
+        CHECK(native_bits32("1e39") == 0x7F800000u);
+        CHECK(native_bits32("-1e-50") == 0x80000000u);
+        // not rounded through double: its double would round to another float
+        CHECK(native_bits32("1.00000005960464477539062500000000001") == 0x3F800001u);
+        CHECK(native_bits32("9007199254740993") == 0x5A000000u);
+    }
+
+    SECTION("the conversion shared with other parsers")
+    {
+        // convert_float() gives the lexer's results, for every type
+        const std::vector<std::string> tokens =
+        {
+            "0", "-0.0", "1.5", "0.1", "1e-400", "-2.5E+3", "123456789012345678901234567890",
+            "9007199254740993.0000000000000000001", "4.9406564584124654e-324"
+        };
+        using float_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;
+        using long_double_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, long double>;
+        for (const auto& t : tokens)
+        {
+            CAPTURE(t)
+            const auto layout = float_token_layout(t);
+            const char* const first = t.data();
+            const char* const last = first + t.size();
+            const auto d = nlohmann::detail::convert_float<double>(first, last, layout.first, layout.second);
+            const auto f = nlohmann::detail::convert_float<float>(first, last, layout.first, layout.second);
+            const auto ld = nlohmann::detail::convert_float<long double>(first, last, layout.first, layout.second);
+            CHECK(bits_of(d) == bits_of(json::parse(t).get<double>()));
+            CHECK(bits_of(f) == bits_of(float_json::parse(t).get<float>()));
+            CHECK(ld == long_double_json::parse(t).get<long double>());
+        }
+    }
 }

 namespace
@@ -807,40 +1086,6 @@ std::size_t big_bit_length(const big_uint& a)
    }
    return n;
 }
-
-std::uint64_t bits_of(double d)
-{
-    std::uint64_t b = 0;
-    std::memcpy(&b, &d, sizeof(b));
-    return b;
-}
-
-bool eisel_lemire(const std::string& s, double& out)
-{
-    return nlohmann::detail::parse_float_eisel_lemire(s.data(), s.data() + s.size(), out);
-}
-
-// significant digits of a token, without trailing zeros
-std::size_t significant_digits(const std::string& s)
-{
-    std::string digits;
-    for (const char c : s)
-    {
-        if (c == 'e' || c == 'E')
-        {
-            break;
-        }
-        if (c >= '0' && c <= '9' && !(digits.empty() && c == '0'))
-        {
-            digits += c;
-        }
-    }
-    while (!digits.empty() && digits.back() == '0')
-    {
-        digits.pop_back();
-    }
-    return digits.size();
-}
 } // namespace

 TEST_CASE("Eisel-Lemire float conversion")
@@ -1268,26 +1513,33 @@ TEST_CASE("Eisel-Lemire float conversion")
        for (const auto& c : known)
        {
            CAPTURE(c.first)
-            double out = 0;
-            if (eisel_lemire(c.first, out))
+            CHECK(native_bits64(c.first) == c.second);
+        }
+    }
+
+    SECTION("binary32")
    {
-                CHECK(bits_of(out) == c.second);
-            }
-            else
-            {
-                // only tokens with more than 19 significant digits are left to
-                // strtod: those whose value lies too close to a tie
-                CHECK(significant_digits(c.first) > 19);
-            }
-        }
+        using binary32 = nlohmann::detail::ieee_binary_format<24>;
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(0, 1) == 0x3F800000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-1, 1) == 0x3DCCCCCDu);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-1, 15) == 0x3FC00000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(0, 16777217) == 0x4B800000u); // tie, to even
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(0, 16777219) == 0x4B800002u); // tie, to even
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-45, 1) == 0x00000001u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-46, 7) == 0x00000000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-46, 8) == 0x00000001u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-65, 9999999999999999999u) == 0x00000000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(20, 3402823466385288598u) == 0x7F7FFFFFu);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(20, 3402823669209384635u) == 0x7F800000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(39, 1) == 0x7F800000u);
+        CHECK(nlohmann::detail::eisel_lemire<binary32>(-5, 0) == 0x00000000u);
    }

    SECTION("round trip")
    {
-        // every double written by to_chars and read back, also with trailing
-        // digits that make the token longer than 19 digits
+        // every double written by to_chars and read back, and its 17-digit
+        // form with trailing digits that make the token longer than 19 digits
        std::uint64_t state = 5295;
-        std::size_t declined = 0;
        for (int i = 0; i < 200000; ++i)
        {
            state ^= state << 13u;
@@ -1309,30 +1561,51 @@ TEST_CASE("Eisel-Lemire float conversion")
            const char* end = nlohmann::detail::to_chars(buffer.data(), buffer.data() + buffer.size(), d);
            const std::string token(buffer.data(), static_cast<std::size_t>(end - buffer.data()));
            CAPTURE(token)
-            double out = 0;
-            REQUIRE(eisel_lemire(token, out));
-            CHECK(bits_of(out) == b);
+            CHECK(native_bits64(token) == b);

-            // insert digits before the exponent: the value moves by far less
-            // than the distance to the rounding boundary, so it must not change
-            std::string longer = token;
+            // insert digits before the exponent of the 17-digit form: that
+            // form lies strictly inside the rounding interval of the double
+            // (the shortest one may lie on its boundary), and the digits move
+            // it by far less than the distance to the boundary, so the value
+            // must not change
+            std::array<char, 64> digits17{};
+            static_cast<void>(std::snprintf(digits17.data(), digits17.size(), "%.17g", d)); // NOLINT(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
+            std::string longer = digits17.data();
            const std::size_t e = longer.find('e');
            const std::size_t dot = longer.find('.');
            const std::string extra = dot == std::string::npos ? ".000000000000000000001" : "000000000000000000001";
            longer.insert(e == std::string::npos ? longer.size() : e, extra);
            CAPTURE(longer)
-            if (eisel_lemire(longer, out))
+            CHECK(native_bits64(longer) == b);
+        }
+    }
+
+    SECTION("round trip, binary32")
    {
-                CHECK(bits_of(out) == b);
-            }
-            else
+        std::uint32_t state = 5295;
+        for (int i = 0; i < 100000; ++i)
        {
-                // w and w + 1 round differently: only when the value is very
-                // close to a rounding boundary
-                ++declined;
+            state ^= state << 13u;
+            state ^= state >> 17u;
+            state ^= state << 5u;
+            std::uint32_t b = state;
+            if ((b & 0x7F800000u) == 0x7F800000u)
+            {
+                continue; // infinity or NaN
            }
+            if (i % 4 == 0)
+            {
+                b &= 0x807FFFFFu; // subnormals
+            }
+            float f = 0;
+            std::memcpy(&f, &b, sizeof(f));
+
+            std::array<char, 64> buffer{};
+            const char* end = nlohmann::detail::to_chars(buffer.data(), buffer.data() + buffer.size(), f);
+            const std::string token(buffer.data(), static_cast<std::size_t>(end - buffer.data()));
+            CAPTURE(token)
+            CHECK(native_bits32(token) == b);
        }
-        CHECK(declined < 1000); // 107 of the 200,000
    }

    SECTION("used by the lexer")
@@ -1346,3 +1619,184 @@ TEST_CASE("Eisel-Lemire float conversion")
                             "[json.exception.out_of_range.406] number overflow parsing '1.7976931348623159e308'", json::out_of_range&);
    }
 }
+
+namespace
+{
+using float_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;
+
+// the bits of the float that parse() gives for a token, via both scanners;
+// the value must be the same for both
+template<typename Json, typename Bits>
+void check_parse(const std::string& token, Bits expected, Bits infinity)
+{
+    std::stringstream stream(token);
+    if ((expected & ~(Bits{1} << ((8 * sizeof(Bits)) - 1))) == infinity)
+    {
+        Json _;
+        CHECK_THROWS_WITH_AS(_ = Json::parse(token), ("[json.exception.out_of_range.406] number overflow parsing '" + token + "'").c_str(), typename Json::out_of_range&);
+        CHECK_THROWS_WITH_AS(_ = Json::parse(stream), ("[json.exception.out_of_range.406] number overflow parsing '" + token + "'").c_str(), typename Json::out_of_range&);
+        return;
+    }
+    const Json contiguous = Json::parse(token);
+    const Json streamed = Json::parse(stream);
+    if (contiguous.is_number_float()) // not an integer that fits
+    {
+        CHECK(bits_of(contiguous.template get<typename Json::number_float_t>()) == expected);
+        CHECK(bits_of(streamed.template get<typename Json::number_float_t>()) == expected);
+    }
+    else
+    {
+        CHECK(streamed.is_number_integer());
+    }
+}
+} // namespace
+
+TEST_CASE("float conversion of hard cases")
+{
+    // see float_hard_cases.hpp
+    for (const auto& c : float_hard_cases::cases())
+    {
+        const std::string token = c.token;
+        CAPTURE(token)
+        CHECK(native_bits64(token) == c.bits64);
+        CHECK(native_bits32(token) == c.bits32);
+        check_parse<json>(token, c.bits64, std::uint64_t{0x7FF0000000000000u});
+        check_parse<float_json>(token, c.bits32, std::uint32_t{0x7F800000u});
+    }
+}
+
+TEST_CASE("float overflow and underflow in the parser")
+{
+    SECTION("double")
+    {
+        check_parse<json>("1.7976931348623157e308", std::uint64_t{0x7FEFFFFFFFFFFFFFu}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("1.7976931348623159e308", std::uint64_t{0x7FF0000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("-1e309", std::uint64_t{0xFFF0000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("1" + std::string(400, '0'), std::uint64_t{0x7FF0000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("1e99999999999999999999", std::uint64_t{0x7FF0000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        // an underflow gives a zero with the sign of the token
+        check_parse<json>("1e-400", std::uint64_t{0}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("-1e-400", std::uint64_t{0x8000000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("-2.4703282292062327e-324", std::uint64_t{0x8000000000000000u}, std::uint64_t{0x7FF0000000000000u});
+        check_parse<json>("0." + std::string(400, '0') + "1", std::uint64_t{0}, std::uint64_t{0x7FF0000000000000u});
+    }
+
+    SECTION("float")
+    {
+        check_parse<float_json>("3.4028234e38", std::uint32_t{0x7F7FFFFFu}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("3.4028236e38", std::uint32_t{0x7F800000u}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("-1e39", std::uint32_t{0xFF800000u}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("1e-46", std::uint32_t{0}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("-1e-46", std::uint32_t{0x80000000u}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("-7.006492321624085e-46", std::uint32_t{0x80000000u}, std::uint32_t{0x7F800000u});
+        check_parse<float_json>("-7.006492321624086e-46", std::uint32_t{0x80000001u}, std::uint32_t{0x7F800000u});
+    }
+}
+
+TEST_CASE("string scanning kernels")
+{
+    // the word-at-a-time kernels must stop exactly where a byte-by-byte scan
+    // stops, for any content, length, and alignment
+    const auto reference_special = [](const unsigned char* data, std::size_t n)
+    {
+        std::size_t i = 0;
+        while (i < n && !nlohmann::detail::is_string_special(data[i]))
+        {
+            ++i;
+        }
+        return i;
+    };
+    const auto reference_copyable = [](const unsigned char* data, std::size_t n)
+    {
+        std::size_t i = 0;
+        while (i < n && nlohmann::detail::is_ascii_copyable(data[i]))
+        {
+            ++i;
+        }
+        return i;
+    };
+    const auto reference_bulk_run = [](const unsigned char* data, std::size_t n)
+    {
+        std::size_t i = 0;
+        while (i < n)
+        {
+            if (data[i] < 0x80u)
+            {
+                if (nlohmann::detail::is_string_special(data[i]))
+                {
+                    break;
+                }
+                ++i;
+                continue;
+            }
+            const std::size_t seq = nlohmann::detail::validate_one_utf8(data + i, n - i);
+            if (seq == 0)
+            {
+                break;
+            }
+            i += seq;
+        }
+        return i;
+    };
+
+    // pieces: ordinary ASCII, stops, DEL, well-formed sequences of every
+    // length, and ill-formed or truncated ones
+    const std::vector<std::string> pieces =
+    {
+        "a", "Z", " ", "~", "0123456789", "\"", "\\", std::string(1, '\0'), "\n", "\x1F", "\x7F",
+        "\xC3\xA4", "\xE2\x82\xAC", "\xE6\x97\xA5\xE6\x9C\xAC", "\xF0\x9F\x98\x80", "\xED\x9F\xBF",
+        "\x80", "\xC0\x80", "\xC3", "\xE2\x82", "\xED\xA0\x80", "\xF4\x90\x80\x80", "\xFF",
+    };
+    std::uint64_t state = 5295;
+    const auto next = [&state]()
+    {
+        state ^= state << 13u;
+        state ^= state >> 7u;
+        state ^= state << 17u;
+        return state;
+    };
+    // the upper half as a 32-bit value: converts to std::size_t implicitly on
+    // every platform (a cast of std::uint64_t is useless where both are the
+    // same type, and required where std::size_t is 32 bits wide)
+    const auto next_small = [&next]()
+    {
+        return static_cast<std::uint32_t>(next() >> 32u);
+    };
+    for (int round = 0; round < 100000; ++round)
+    {
+        // mostly ordinary text, so that runs span several words
+        std::string text(next_small() % 8u, '.');
+        const std::size_t count = next_small() % 12u;
+        for (std::size_t k = 0; k < count; ++k)
+        {
+            const std::size_t p = (next() % 4 == 0) ? next_small() % pieces.size() : 0;
+            text += pieces[p];
+            text += std::string(next_small() % 10u, 'x');
+        }
+        const auto* data = reinterpret_cast<const unsigned char*>(text.data()); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
+        for (std::size_t offset = 0; offset < 3 && offset <= text.size(); ++offset)
+        {
+            const std::size_t n = text.size() - offset;
+            CAPTURE(text)
+            CAPTURE(offset)
+            CHECK(nlohmann::detail::find_string_special(data + offset, n) == reference_special(data + offset, n));
+            CHECK(nlohmann::detail::find_ascii_copyable_run(data + offset, n) == reference_copyable(data + offset, n));
+            CHECK(nlohmann::detail::scalar_string_bulk_run(data + offset, n) == reference_bulk_run(data + offset, n));
+        }
+    }
+
+    // the trailing-zero count, whichever implementation the compiler gets
+    for (int k = 0; k < 64; ++k)
+    {
+        const std::uint64_t bit = std::uint64_t{1} << k;
+        CHECK(nlohmann::detail::count_trailing_zeros(bit) == k);
+        CHECK(nlohmann::detail::count_trailing_zeros(bit | (bit << 1u) | 0x8000000000000000u) == k);
+    }
+
+    // eight bytes as a little-endian word, at any alignment
+    const std::array<unsigned char, 16> bytes = {{0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0xFF}};
+    CHECK(nlohmann::detail::read_eight_bytes(bytes.data()) == 0x0807060504030201u);
+    CHECK(nlohmann::detail::read_eight_bytes(bytes.data() + 1) == 0x0908070605040302u);
+    CHECK(nlohmann::detail::read_eight_bytes(bytes.data() + 8) == 0xFF0F0E0D0C0B0A09u);
+    CHECK(nlohmann::detail::read_eight_bytes(reinterpret_cast<const char*>(bytes.data()) + 3) == 0x0B0A090807060504u);
+}
@@ -260,10 +260,11 @@ struct LocaleSwitchingSax final: public nlohmann::json_sax<json>

 TEST_CASE("locale changes between lexer construction and number conversion (#5198)")
 {
-    // The numbers are chosen so that the conversion also takes the strtod
-    // fallback, which honors the locale that is current at conversion time:
-    // too many significant digits for Clinger's fast path, an underflow that
-    // std::from_chars rejects, and a plain value.
+    // float and double are converted without the locale. A long double that
+    // is not binary64 can take the strtold fallback, which honors the locale
+    // that is current at conversion time. The numbers are chosen so that it
+    // does: too many significant digits for Clinger's fast path, an underflow
+    // that std::from_chars rejects, and a plain value.
    const std::vector<std::string> numbers = {"3.14159265358979323846", "1.5e-400", "12.34", "-0.000123456789012345678"};
    std::string text = "[";
    for (const auto& n : numbers)
@@ -327,7 +328,8 @@ TEST_CASE("locale changes between lexer construction and number conversion (#519
            }
        }

-        // a long double goes through std::strtold unless std::from_chars supports it
+        // a long double goes through std::strtold unless it is binary64 or
+        // std::from_chars supports it
        {
            bool switched = false;
            const auto cb = [&](int /*depth*/, long_double_json::parse_event_t event, long_double_json& /*parsed*/) noexcept
@@ -353,8 +355,15 @@ TEST_CASE("locale with a multi-byte decimal point")
 {
    // Some locales use a decimal point that is not a single character, e.g.
    // U+066B ARABIC DECIMAL SEPARATOR (two bytes in UTF-8). It cannot be
-    // substituted in place for '.', so the strtod fallback stops early. The
-    // conversion must still terminate rather than retry forever.
+    // substituted in place for '.', so the strtold fallback (only for long
+    // double formats other than binary64) converts a copy of the token with
+    // the whole decimal point instead (#5660). The values must be those of the
+    // "C" locale.
+    using long_double_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, long double>;
+    const char* const long_double_numbers = "[3.14159265358979323846, 1.5e-400, -0.000123456789012345678]";
+    REQUIRE(std::setlocale(LC_NUMERIC, "C") != nullptr);
+    const long_double_json expected_long_double = long_double_json::parse(long_double_numbers);
+
    const std::array<const char*, 6> names = {{"ar_EG.UTF-8", "ar_SA.UTF-8", "fa_IR.UTF-8", "ps_AF.UTF-8", "ar_EG", "fa_IR"}};
    bool tested = false;
    for (const char* name : names)
@@ -372,12 +381,20 @@ TEST_CASE("locale with a multi-byte decimal point")
        tested = true;

        // too many significant digits for Clinger's fast path, and an underflow
-        // that std::from_chars rejects: both reach the strtod fallback
+        // that std::from_chars rejects: double does not depend on the locale
        json j;
        CHECK_NOTHROW(j = json::parse("[3.14159265358979323846, 1.5e-400, -0.000123456789012345678]"));
        CHECK(j.is_array());
+        CHECK(j[0] == 3.14159265358979323846);
+        CHECK(j[1] == 0.0);
+        CHECK(j[2] == -0.000123456789012345678);
        CHECK(json::accept("3.14159265358979323846"));

+        // a long double that reaches the strtold fallback is not truncated
+        long_double_json ld;
+        CHECK_NOTHROW(ld = long_double_json::parse(long_double_numbers));
+        CHECK(ld == expected_long_double);
+
        // a value the locale-independent paths convert is not affected
        CHECK(json::parse("12.5") == 12.5);
    }
@@ -0,0 +1,9 @@
+{
+	"project": "JSON for Modern C++",
+	"target": "single_include/nlohmann/json_view.hpp",
+	"sources": [
+		"include/nlohmann/json_view.hpp"
+	],
+	"include_paths": ["include"],
+	"external": ["nlohmann/json.hpp"]
+}
@@ -15,8 +15,7 @@ file or the library version is bumped — otherwise the committed
 make natvis
 ```

-`make natvis` sets up a virtual environment `tools/generate_natvis/venv` with the dependencies from
-`requirements.txt` (Jinja2) and runs the script with it. Alternatively, install the requirements yourself and run:
+or, equivalently:

 ```shell
 ./generate_natvis.py [--version X.Y.Z] [repository_root/]
Author	SHA1	Message	Date
Niels Lohmann	fb924c403c	Merge branch 'develop' into json-view/02b-float-parser Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 16:23:02 +02:00
Niels Lohmann	f8b47ff6f6	Check the URL scheme before downloading in generate_docset.py (#5803 ) Codacy flagged two Bandit findings in the docset generator added in #5799: B310 (urlopen with an unchecked scheme) and B506 (yaml.load). download() now rejects anything but http(s) URLs before opening them, and the yaml.load call is marked, since its Loader derives from yaml.SafeLoader. The SHA-1 used to name downloaded files is marked as not used for security. Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 16:21:53 +02:00
Niels Lohmann	a8bbc365d5	Merge branch 'develop' into json-view/02b-float-parser Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 12:50:34 +02:00
Niels Lohmann	3caf0e7cdb	Mark the unsigned long of the MSVC bit scans for cpplint Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 11:07:53 +02:00
Niels Lohmann	48a69ef01d	Merge branch 'develop' into json-view/02b-float-parser Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 01:32:41 +02:00
Niels Lohmann	efcbab2cf3	Fix clang-tidy 22 findings in unit-class_lexer.cpp Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-10 01:23:25 +02:00
Niels Lohmann	e1a85099ef	Regenerate the amalgamated headers Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-09 16:01:50 +02:00
Niels Lohmann	653edd738a	Reword float conversion notes for the string type and number_float_t docs Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-09 16:01:49 +02:00
Niels Lohmann	0e729be261	Load string scan words with memcpy and use MSVC bit-scan intrinsics Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-09 16:01:48 +02:00
Niels Lohmann	43c75bef51	Merge branch 'develop' into json-view/02b-float-parser Signed-off-by: Niels Lohmann <mail@nlohmann.me> # Conflicts: # tests/src/unit-class_lexer.cpp	2026-10-08 16:19:06 +02:00
Niels Lohmann	39d34f30ba	Merge branch 'develop' into json-view/02b-float-parser Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-07 20:26:13 +02:00
Niels Lohmann	88ddacb84b	Fix CI warnings in own float parser - pow5_table.hpp: pow5_128_largest_power was unused in this branch's own code (GCC -Werror=unused-const-variable); tie it to the table size with a static_assert instead of removing it, since a later branch in the stack (json-view/23-zmij) uses it. - number_parse.hpp: rename the local variable `copy` to `buffer` to satisfy cpplint's build/include_what_you_use check. - unit-class_lexer.cpp: extend the NOLINT list on the seeded mt19937 with bugprone-random-generator-seed, and parenthesize `8 * sizeof(Bits) - 1` for clang-tidy. Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-07 20:26:12 +02:00
Niels Lohmann	68d61b6aef	Speed up the lexer: own float parser, string scan, and \u table Give the library its own correctly rounded float converter for binary32 and binary64 (IEEE 754), and speed up the lexer's string and escape scanning. The converter splits a number token into sign, significand, and decimal exponent, then tries Clinger's fast path, then a templated Eisel-Lemire step, and falls back to an exact big-integer digit comparison for tokens with more than 19 significant digits whose two candidate values round differently. This replaces std::from_chars and strtod/strtof for both formats, so parsed values no longer depend on the C/C++ library or the current locale. The strtold fallback kept for other long double formats (x87, binary128) now also copies a multi-byte decimal point correctly, fixing #5660. eisel_lemire() and decimal_to_float() are always inlined so callers keep the whole conversion in their hot loop. The string-scanning kernels in string_scan.hpp find a stop byte with the trailing-zero count of the SWAR mask instead of a byte loop, and scalar_string_bulk_run() validates a run of multi-byte UTF-8 sequences one after another instead of re-searching after each one. get_codepoint() decodes a contiguous \uXXXX escape with one table lookup per byte instead of four range-checked get() calls; the streaming path and all error positions are unchanged. Adds 508 generated hard float-parsing cases with expected binary32 and binary64 bits, and kernel-comparison tests for the string scans and the escape table against byte-by-byte references. Signed-off-by: Niels Lohmann <mail@nlohmann.me>	2026-10-07 16:41:43 +02:00