Regenerate the amalgamated headers

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Fix the clang-tidy 22 findings in json_view and its tests
2026-10-11 08:57:15 +00:00 · 2026-10-11 10:28:08 +02:00 · 2026-10-11 10:28:07 +02:00 · 2026-10-11 10:28:06 +02:00 · 2026-10-11 10:28:05 +02:00 · 2026-10-11 10:28:04 +02:00
343 changed files with 24393 additions and 4173 deletions
@@ -0,0 +1,3 @@
+# 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 250 contributors have helped to improve the library.
+# Since 2013, over 400 contributors have helped to improve the library.
 # This CODEOWNERS file is only to make sure that @nlohmann is requested
 # for a code review in case of a pull request.

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

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

 #### Add tests
@@ -157,8 +157,9 @@ 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) and
-[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp)
+[`single_include/nlohmann/json.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json.hpp),
+[`single_include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_fwd.hpp), and
+[`single_include/nlohmann/json_literals.hpp`](https://github.com/nlohmann/json/blob/develop/single_include/nlohmann/json_literals.hpp)
 are **generated** from the source files in the
 [`include/nlohmann` directory](https://github.com/nlohmann/json/tree/develop/include/nlohmann). **Do not** edit the
 files directly; instead, modify the include/nlohmann sources and regenerate the files by executing:
@@ -181,7 +182,7 @@ The amalgamation check in CI fails if any of these generated files is out of dat

 ## Recommended documentation

- The library’s [README file](https://github.com/nlohmann/json/blob/master/README.md) is an excellent starting point to
+- The library’s [README file](https://github.com/nlohmann/json/blob/develop/README.md) is an excellent starting point to
  understand its functionality.
 - The [documentation page](https://json.nlohmann.me) is the reference documentation of the library.
 - [RFC 8259](https://datatracker.ietf.org/doc/html/rfc8259) is the reference for the JavaScript Object Notation (JSON)
@@ -220,9 +221,9 @@ feature macros then allows users to test their code against the library in the n
 ### Break C++11 language conformance

 This library is designed to work with C++11 and later. This means that any
-[supported C++11 compiler](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers) should compile
+[supported C++11 compiler](https://github.com/nlohmann/json/blob/develop/README.md#supported-compilers) should compile
 the library without problems. Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual
-Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support.
+C++ 2013 and earlier are known not to work due to missing or incomplete C++11 support.

 Please do not add features that do not work with the mentioned supported compilers. Please guard features from C++14 and
 later against the respective [`JSON_HAS_CPP_14`](https://json.nlohmann.me/api/macros/json_has_cpp_11/) macros.
@@ -238,12 +239,11 @@ extension.
 The following areas really need contribution and are always welcomed:

 - Extending the **continuous integration** toward more exotic compilers such as Android NDK, Intel's Compiler, or the
-  bleeding-edge versions Clang.
- Improving the efficiency of the **JSON parser**. The current parser is implemented as a naive recursive descent parser
-  with hand-coded string handling. More sophisticated approaches like LALR parsers would be really appreciated. That
-  said, parser generators like Bison or ANTLR do not play nice with single-header files -- I really would like to keep
-  the parser inside the `json.hpp` header, and I am not aware of approaches similar to [`re2c`](http://re2c.org) for
-  parsing.
+  bleeding-edge versions of Clang.
+- Improving the efficiency of the **JSON parser**. The current parser is a hand-written iterative parser that keeps an
+  explicit stack instead of recursing, with hand-coded string handling. Speeding up the lexer or the value construction
+  would be appreciated. Parser generators like Bison or ANTLR do not play nice with single-header files -- I really
+  would like to keep the parser inside the `json.hpp` header.
 - Extending and updating existing **benchmarks** to include (the most recent version of) this library. Though efficiency
  is not everything, speed and memory consumption are very important characteristics for C++ developers, so having
  proper comparisons would be interesting.
@@ -52,7 +52,7 @@ body:
        If possible, provide a small and self-contained example that triggers
        the bug. Please understand that we cannot analyze and debug large code
        bases. Please do not paste screenshots here.
-      render: Shell
+      render: cpp
  - type: textarea
    id: output
    attributes:
@@ -79,7 +79,7 @@ body:
      description: >
        Which version of the library did you use? If it is a released version,
        please enter the version number (e.g., 3.12.0). Otherwise, please enter
-        the commit hash. If you got the library from another source as the
+        the commit hash. If you got the library from another source than the
        GitHub repository (e.g., via a package manager), please also state
        this.
    validations:
@@ -21,6 +21,17 @@ labels:
  files:
    - "cmake/.*"

+# other build systems
+- label: "CMake"
+  files:
+    - "(meson\\.build|meson_options\\.txt|BUILD\\.bazel|MODULE\\.bazel|Package\\.swift)"
+
+- label: "documentation"
+  files:
+    - ".github/ISSUE_TEMPLATE/.*"
+    - ".github/config\\.yml"
+    - ".github/(CONTRIBUTING|SECURITY|CODE_OF_CONDUCT|PULL_REQUEST_TEMPLATE)\\.md"
+
 - label: "CI"
  files:
    - ".github/workflows/.*"
@@ -45,6 +56,23 @@ labels:
 - label: "aspect: binary formats"
  title: "(?i)(bson|cbor|msgpack|messagepack|ubjson|bjdata|bon8|binary format)"

+- label: "aspect: json_view"
+  files:
+    - "include/nlohmann/json_view\\.hpp"
+    - "include/nlohmann/detail/view/.*"
+    - "single_include/nlohmann/json_view\\.hpp"
+    - "tests/src/unit-json_view.*"
+    - "tests/src/fuzzer-parse_json_view\\.cpp"
+    - "tools/amalgamate/config_json_view\\.json"
+    - "docs/mkdocs/docs/features/json_view\\.md"
+    - "docs/mkdocs/docs/api/basic_json_(document|view)/.*"
+    - "docs/mkdocs/docs/api/(ordered_)?json_(document|view)\\.md"
+    - "docs/mkdocs/docs/examples/(basic_json_(document|view)__|(ordered_)?json_(document|view)).*"
+    - "tests/benchmarks/src/benchmarks_view\\.cpp"
+
+- label: "aspect: json_view"
+  title: "(?i)(json_view|json_document|zero-copy)"
+
 - label: "python"
  files:
    - "\\.py$"
@@ -83,8 +83,7 @@ jobs:
          # byte for byte), so there is nothing to gain from checking out a
          # separate copy, and doing so would make this step fail on a PR
          # that adds support for a new dispatch table until that PR itself
-          # merges to develop, the same way generate_natvis.py's --version
-          # requirement briefly did.
+          # merges to develop.
          TMPDIR=$(mktemp -d ./macro_builder_check.XXXXXX)
          c++ -std=c++11 tools/macro_builder/main.cpp -o "$TMPDIR/macro_builder"
          "$TMPDIR/macro_builder" > "$TMPDIR/paste.hpp"
@@ -117,13 +116,15 @@ 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 configuration of json_view.hpp comes with the pull request until
+          # it is on develop; the tool itself is still develop's
+          python3 $TOOL_DIR/amalgamate.py -c $MAIN_DIR/tools/amalgamate/config_json_view.json -s .

          # the header list of the Bazel "json" target must match the files in include/
          cmake -P cmake/scripts/gen_bazel_build_file.cmake

          ${{ github.workspace }}/venv/bin/astyle --project=tools/astyle/.astylerc --suffix=none --quiet \
-            $INCLUDE_DIR/json.hpp $INCLUDE_DIR/json_fwd.hpp
+            $INCLUDE_DIR/json.hpp $INCLUDE_DIR/json_fwd.hpp $INCLUDE_DIR/json_view.hpp

          # fail loudly if a directory is renamed or removed: find would only warn
          # about the missing path and silently drop its files from the check
@@ -138,17 +139,13 @@ jobs:
          ${{ github.workspace }}/venv/bin/astyle --project=tools/astyle/.astylerc --suffix=none --quiet \
            $(find $SOURCE_DIRS -type f \( -name '*.hpp' -o -name '*.cpp' -o -name '*.cu' \) -not -path 'tests/thirdparty/*' -not -path 'tests/abi/include/nlohmann/*' | sort)

+          # json_literals.hpp is copied verbatim from the (now formatted) include/
+          # directory, like `make amalgamate` does
+          cp include/nlohmann/json_literals.hpp $INCLUDE_DIR/json_literals.hpp
+
      - name: Regenerate nlohmann_json.natvis
        run: |
          cd $MAIN_DIR
-          # Pass --version explicitly so this step also works with the tool
-          # copy from develop before this repository's own generate_natvis.py
-          # learns to derive the version itself: the older script requires
-          # --version, and the newer one accepts it as an explicit override.
-          ABI_MACROS=include/nlohmann/detail/abi_macros.hpp
-          VERSION_MAJOR=$(grep -m1 'define NLOHMANN_JSON_VERSION_MAJOR' $ABI_MACROS | grep -o '[0-9]\+')
-          VERSION_MINOR=$(grep -m1 'define NLOHMANN_JSON_VERSION_MINOR' $ABI_MACROS | grep -o '[0-9]\+')
-          VERSION_PATCH=$(grep -m1 'define NLOHMANN_JSON_VERSION_PATCH' $ABI_MACROS | grep -o '[0-9]\+')
          # The template is what this check verifies the committed natvis
          # file against, so take it from this PR rather than from the
          # develop checkout: generate_natvis.py loads the template from its
@@ -156,7 +153,7 @@ jobs:
          # template could never pass. Like the macro_builder step above,
          # this only renders PR content in a job without credentials.
          cp tools/generate_natvis/nlohmann_json.natvis.j2 $NATVIS_TOOL_DIR/
-          python3 $NATVIS_TOOL_DIR/generate_natvis.py --version "$VERSION_MAJOR.$VERSION_MINOR.$VERSION_PATCH" $MAIN_DIR
+          python3 $NATVIS_TOOL_DIR/generate_natvis.py $MAIN_DIR

      - name: Build patch and check for differences
        id: diff
@@ -165,7 +162,7 @@ jobs:
          mkdir -p ${{ github.workspace }}/patch
          git diff --patch --no-color > ${{ github.workspace }}/patch/amalgamation.patch
          if [ -s ${{ github.workspace }}/patch/amalgamation.patch ]; then
-            echo "The source code has not been amalgamated/formatted correctly or BUILD.bazel is out of date. Diff:"
+            echo "The source code has not been amalgamated/formatted correctly, or BUILD.bazel, nlohmann_json.natvis, or the macro_builder tables in macro_scope.hpp are out of date ('make amalgamate BUILD.bazel natvis' fixes all but the tables, see tools/macro_builder/README.md). Diff:"
            cat ${{ github.workspace }}/patch/amalgamation.patch
            echo "has_diff=true" >> "$GITHUB_OUTPUT"
          else
@@ -96,7 +96,7 @@ jobs:
              issue_number: issue_number,
              owner: context.repo.owner,
              repo: context.repo.repo,
-              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated and/or formatted correctly, or `BUILD.bazel` is out of date.'
+              body: '## 🔴 Amalgamation check failed! 🔴\nThe source code has not been amalgamated and/or formatted correctly, or `BUILD.bazel`, `nlohmann_json.natvis`, or the macro_builder tables in `macro_scope.hpp` are out of date. `make amalgamate BUILD.bazel natvis` fixes all but the tables (see `tools/macro_builder/README.md`).'
                    + (hasPatch ? '\n\n📎 A ready-to-apply patch is attached to the [failed workflow run](' + runUrl + ') as the `amalgamation-patch` artifact.'
                                  + ' Download it, then apply it locally from the repository root with:'
                                  + '\n\n```shell\ngit apply amalgamation.patch\n```\n\n'
@@ -15,6 +15,7 @@ on:
      - .github/SECURITY.md
      - cmake/clang_flags.cmake
      - cmake/gcc_flags.cmake
+      - include/nlohmann/detail/abi_macros.hpp
      - tests/fmt_formatter/project/main.cpp
      - tools/astyle/.astylerc
  workflow_dispatch:
@@ -109,7 +109,7 @@ jobs:
    runs-on: ubuntu-latest
    strategy:
      matrix:
-        target: [ci_test_amalgamation, ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
+        target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@e14015d583714f6e62063499dc959a02595150a1 # v2.21.1
@@ -117,6 +117,7 @@ jobs:
          egress-policy: audit

      - name: Install Valgrind
+        if: matrix.target == 'ci_test_valgrind'
        run: sudo apt-get update ; sudo apt-get install -y valgrind
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
@@ -279,7 +280,7 @@ jobs:
          persist-credentials: false
      - name: Get latest CMake and ninja
        uses: lukka/get-cmake@fffaaafeea488556c2c12dad60690008bc1caacb # v4.4.2
-      - name: Set env FORCE_STDCPPFS_FLAG for clang 7 / 8 / 9 / 10
+      - name: Disable filesystem support (std::filesystem is unusable) for clang 7 / 8 / 9 / 10
        run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
        if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
      - name: Run CMake
@@ -187,7 +187,7 @@ jobs:
      - name: Test
        run: cd build ; ctest -j 10 -C Debug --output-on-failure

-  clang-cl-12:
+  clang-cl:
    runs-on: windows-2022
    strategy:
      matrix:
@@ -217,8 +217,10 @@ jobs:
        uses: lukka/get-cmake@fffaaafeea488556c2c12dad60690008bc1caacb # v4.4.2
        with:
          cmakeVersion: 4.3.4
+      # CMAKE_CXX_FLAGS replaces CMake's MSVC defaults (which include /EHsc), and
+      # ci_module_cpp20 forwards it to the module build, so list /EHsc explicitly
      - name: Run CMake (Debug)
-        run: cmake -S . -B build -G "Visual Studio 17 2022" -DJSON_CI=ON -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /W4 /WX"
+        run: cmake -S . -B build -G "Visual Studio 17 2022" -DJSON_CI=ON -DCMAKE_CXX_FLAGS="/permissive- /std:c++latest /utf-8 /EHsc /W4 /WX"
      - name: Build
        run: cmake --build build --config Debug --target ci_module_cpp20
        
@@ -27,7 +27,6 @@
 /docs/docset/JSON_for_Modern_C++.tgz
 /docs/docset/docSet.dsidx
 /docs/mkdocs/.cache/
-/docs/mkdocs/docs/__pycache__/
 /docs/mkdocs/hooks/__pycache__/
 /docs/mkdocs/scripts/mermaid/node_modules/
 /docs/mkdocs/site/
@@ -47,3 +46,17 @@ nlohmann_json.spdx

 # Bazel-related
 MODULE.bazel.lock
+
+# backups left by `make check-amalgamation` or the ci_test_amalgamation target if they are interrupted
+/BUILD.bazel~
+/nlohmann_json.natvis~
+/single_include/nlohmann/*.hpp~
+/venv_astyle/
+
+# release outputs of `make release`
+/include.zip
+/include.zip.asc
+/json.tar.xz
+/json.tar.xz.asc
+/release_files/
+/single_include/nlohmann/*.asc
@@ -20,11 +20,13 @@ cc_library(
    hdrs = [
        "include/nlohmann/adl_serializer.hpp",
        "include/nlohmann/byte_container_with_subtype.hpp",
+        "include/nlohmann/detail/abi_config.hpp",
        "include/nlohmann/detail/abi_macros.hpp",
        "include/nlohmann/detail/bit_ops.hpp",
        "include/nlohmann/detail/conversions/from_json.hpp",
        "include/nlohmann/detail/conversions/to_chars.hpp",
        "include/nlohmann/detail/conversions/to_json.hpp",
+        "include/nlohmann/detail/conversions/zmij.hpp",
        "include/nlohmann/detail/exceptions.hpp",
        "include/nlohmann/detail/hash.hpp",
        "include/nlohmann/detail/input/binary_reader.hpp",
@@ -65,9 +67,25 @@ cc_library(
        "include/nlohmann/detail/string_escape.hpp",
        "include/nlohmann/detail/string_utils.hpp",
        "include/nlohmann/detail/value_t.hpp",
+        "include/nlohmann/detail/view/builder.hpp",
+        "include/nlohmann/detail/view/document_data.hpp",
+        "include/nlohmann/detail/view/errors.hpp",
+        "include/nlohmann/detail/view/input.hpp",
+        "include/nlohmann/detail/view/iterator.hpp",
+        "include/nlohmann/detail/view/lookup.hpp",
+        "include/nlohmann/detail/view/macro_scope.hpp",
+        "include/nlohmann/detail/view/macro_unscope.hpp",
+        "include/nlohmann/detail/view/materialize.hpp",
+        "include/nlohmann/detail/view/node.hpp",
+        "include/nlohmann/detail/view/number.hpp",
+        "include/nlohmann/detail/view/pointer.hpp",
+        "include/nlohmann/detail/view/scan.hpp",
+        "include/nlohmann/detail/view/string_ref.hpp",
+        "include/nlohmann/detail/view/value.hpp",
        "include/nlohmann/json.hpp",
        "include/nlohmann/json_fwd.hpp",
        "include/nlohmann/json_literals.hpp",
+        "include/nlohmann/json_view.hpp",
        "include/nlohmann/ordered_map.hpp",
        "include/nlohmann/thirdparty/hedley/hedley.hpp",
        "include/nlohmann/thirdparty/hedley/hedley_undef.hpp",
@@ -81,6 +99,8 @@ cc_library(
    hdrs = [
        "single_include/nlohmann/json.hpp",
        "single_include/nlohmann/json_fwd.hpp",
+        "single_include/nlohmann/json_literals.hpp",
+        "single_include/nlohmann/json_view.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: 2025-04-07
+date-released: 2025-04-11
 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(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+    if(NOT CMAKE_VERSION VERSION_LESS 3.28)
        message(STATUS "Building nlohmann.json C++ module")
        add_subdirectory(src/modules)
    else()
@@ -14,7 +14,7 @@ This file describes the source for supporting files; that is, files that are not
 The [GitHub Actions](https://docs.github.com/en/actions) workflows that build, test, and analyze the library. Each file in this folder defines one workflow:

 - `ubuntu.yml`, `macos.yml`, `windows.yml` — build and run the test suite on Linux, macOS, and Windows.
- `check_amalgamation.yml` — verify that the single-header amalgamation in `single_include` is up to date on pull requests.
+- `check_amalgamation.yml` — verify on pull requests and pushes to `develop` that the generated files (the single-header amalgamation in `single_include`, `BUILD.bazel`, and `nlohmann_json.natvis`) are up to date.
 - `comment_check_amalgamation.yml` — comment on a pull request when the amalgamation check failed.
 - `cifuzz.yml` — run short fuzzing sessions via [OSS-Fuzz CIFuzz](https://google.github.io/oss-fuzz/getting-started/continuous-integration/) on pull requests.
 - `codeql-analysis.yml` — run [CodeQL](https://codeql.github.com) code scanning.
@@ -24,7 +24,9 @@ The [GitHub Actions](https://docs.github.com/en/actions) workflows that build, t
 - `dependency-review.yml` — scan dependency changes in pull requests for known vulnerabilities.
 - `labeler.yml` — the "Pull Request Labeler" workflow (see `.github/labeler.yml`).
 - `stale.yml` — comment on and close stale issues and pull requests.
- `publish_documentation.yml` — build and publish the documentation on every merge to the `develop` branch.
+- `publish_documentation.yml` — build and publish the documentation on pushes to the `develop` branch that touch the documentation sources (or the files it embeds).
+- `check_docs_links.yml` — check the links of the documentation weekly, as external links can break without any change in this repository.
+- `cancel_closed_pr_runs.yml` — cancel unfinished workflow runs of a pull request once it is closed or merged.

 Further documentation:

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

-`meson_options.txt` defines the options, which mirror the CMake options that change the library's target (for example,
-`-DDiagnostics=true`). Meson requires this file next to `meson.build`, so it is also part of `include.zip`. `make check_build_options`
+`meson_options.txt` defines the options, which mirror the names of the CMake options that change the library's target (for example,
+`-DDiagnostics=true`); their defaults may differ (for example, `MultipleHeaders` defaults to `false` in Meson, while
+`JSON_MultipleHeaders` is `ON` in CMake). Meson requires this file next to `meson.build`, so it is also part of `include.zip`. `make check_build_options`
 ([`tools/check_build_options`](tools/check_build_options/README.md)) checks in CI that both files and the pkg-config files
 stay in sync with the CMake options.

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

@@ -1,4 +1,4 @@
-.PHONY: pretty clean ChangeLog.md release update_hedley update_hedley_undef BUILD.bazel natvis macro_builder_check check_build_options
+.PHONY: all amalgamate check-amalgamation check_build_options pretty install_astyle clean ChangeLog.md release update_hedley update_hedley_undef BUILD.bazel natvis macro_builder_check run_benchmarks pvs_studio serve_header reuse spdx

 ##########################################################################
 # configuration
@@ -26,6 +26,7 @@ AMALGAMATED_FILE=single_include/nlohmann/json.hpp
 AMALGAMATED_FWD_FILE=single_include/nlohmann/json_fwd.hpp
 # json_literals.hpp only includes <nlohmann/json.hpp>, so it is copied verbatim
 AMALGAMATED_LITERALS_FILE=single_include/nlohmann/json_literals.hpp
+AMALGAMATED_VIEW_FILE=single_include/nlohmann/json_view.hpp

 # the header with the argument-counting macros generated by tools/macro_builder
 MACRO_SCOPE_HPP=include/nlohmann/detail/macro_scope.hpp
@@ -37,16 +38,22 @@ MACRO_SCOPE_HPP=include/nlohmann/detail/macro_scope.hpp

 # main target
 all:
-	@echo "amalgamate - amalgamate files single_include/nlohmann/json{,_fwd,_literals}.hpp from the include/nlohmann sources"
+	@echo "amalgamate - amalgamate files single_include/nlohmann/json{,_fwd,_literals,_view}.hpp from the include/nlohmann sources"
 	@echo "BUILD.bazel - regenerate the Bazel BUILD file from the include/nlohmann sources"
 	@echo "ChangeLog.md - generate ChangeLog file"
 	@echo "check-amalgamation - check whether sources have been amalgamated and BUILD.bazel is up to date"
+	@echo "check_build_options - check that the Meson build and the pkg-config files offer the options of the CMake target"
 	@echo "clean - remove built files"
-	@echo "fuzzing - see tests/fuzzing.md for how to build and run the fuzzers"
+	@echo "(fuzzers) - see tests/fuzzing.md, or run 'make -C tests fuzzers' to build the AFL fuzzers"
 	@echo "macro_builder_check - check that macro_scope.hpp matches tools/macro_builder's output"
 	@echo "natvis - regenerate nlohmann_json.natvis from the current ABI tags and version"
 	@echo "pretty - beautify code with Artistic Style"
+	@echo "pvs_studio - run the PVS-Studio static analyzer and open the report"
+	@echo "release - create the release files (include.zip, json.tar.xz, single headers, signatures, hashes)"
+	@echo "reuse - annotate the source files with REUSE license headers and lint them"
 	@echo "run_benchmarks - build and run benchmarks"
+	@echo "serve_header - serve the single header, re-amalgamated on demand (see tools/serve_header)"
+	@echo "spdx - generate the SPDX software bill of materials nlohmann_json.spdx"
 	@echo "update_hedley - download Hedley and regenerate hedley.hpp / hedley_undef.hpp"
 	@echo "update_hedley_undef - rebuild hedley_undef.hpp from the JSON_HEDLEY_* #define names in hedley.hpp"

@@ -90,10 +97,10 @@ install_astyle:

 # call the Artistic Style pretty printer on all source files
 pretty: install_astyle
-	$(ASTYLE) --project=tools/astyle/.astylerc $(SRCS) $(TESTS_SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) docs/mkdocs/docs/examples/*.cpp docs/mkdocs/docs/examples/*.hpp
+	$(ASTYLE) --project=tools/astyle/.astylerc $(SRCS) $(TESTS_SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE) docs/mkdocs/docs/examples/*.cpp docs/mkdocs/docs/examples/*.hpp

 # create single header files and pretty print
-amalgamate: $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE)
+amalgamate: $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE)
 	$(MAKE) pretty

 # call the amalgamation tool for json.hpp
@@ -108,13 +115,22 @@ $(AMALGAMATED_FWD_FILE): $(SRCS)
 $(AMALGAMATED_LITERALS_FILE): include/nlohmann/json_literals.hpp
 	cp include/nlohmann/json_literals.hpp $(AMALGAMATED_LITERALS_FILE)

+# call the amalgamation tool for json_view.hpp (keeps including json.hpp)
+$(AMALGAMATED_VIEW_FILE): $(SRCS)
+	tools/amalgamate/amalgamate.py -c tools/amalgamate/config_json_view.json -s . --verbose=yes
+
+NATVIS_VENV=tools/generate_natvis/venv
+
 # regenerate nlohmann_json.natvis from the ABI tags and version in include/nlohmann/detail/abi_macros.hpp
+# (the dependencies are installed into a virtual environment first)
 natvis:
-	python3 tools/generate_natvis/generate_natvis.py .
+	@test -d $(NATVIS_VENV) || python3 -mvenv $(NATVIS_VENV)
+	@$(NATVIS_VENV)/bin/python3 -c 'import jinja2' 2>/dev/null || $(NATVIS_VENV)/bin/pip3 install --quiet -r tools/generate_natvis/requirements.txt
+	$(NATVIS_VENV)/bin/python3 tools/generate_natvis/generate_natvis.py .

 # regenerate the two tools/macro_builder blocks of $(MACRO_SCOPE_HPP) (see its README.md) and diff against the
 # checked-in header; phony, because it never writes $(MACRO_SCOPE_HPP) itself
-macro_builder_check:
+macro_builder_check: install_astyle
 	@set -e; \
 	TMPDIR=$$(mktemp -d ./macro_builder_check.XXXXXX); \
 	trap 'rm -rf "$$TMPDIR"' EXIT; \
@@ -131,27 +147,27 @@ macro_builder_check:
 check_build_options:
 	python3 tools/check_build_options/check_build_options.py .

-# check if file single_include/nlohmann/json.hpp has been amalgamated from the nlohmann sources
+# check if the single headers have been amalgamated from the nlohmann sources and if BUILD.bazel and
+# nlohmann_json.natvis are up to date; all checks are run, and the checked-in files are always restored
 check-amalgamation:
-	@mv $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~
-	@mv $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~
-	@mv $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~
-	@$(MAKE) amalgamate
-	@diff $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE) ; false)
-	@diff $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE) ; false)
-	@diff $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE) ; false)
-	@mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE)
-	@mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE)
-	@mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE)
-	@mv BUILD.bazel BUILD.bazel~
-	@$(MAKE) BUILD.bazel
-	@diff BUILD.bazel BUILD.bazel~ || (echo "===================================================================\n  BUILD.bazel is out of date! Please run 'make BUILD.bazel'.\n===================================================================" ; mv BUILD.bazel~ BUILD.bazel ; false)
-	@mv BUILD.bazel~ BUILD.bazel
-	@mv nlohmann_json.natvis nlohmann_json.natvis~
-	@$(MAKE) natvis
-	@diff nlohmann_json.natvis nlohmann_json.natvis~ || (echo "===================================================================\n  nlohmann_json.natvis is out of date! Please run 'make natvis'.\n===================================================================" ; mv nlohmann_json.natvis~ nlohmann_json.natvis ; false)
-	@mv nlohmann_json.natvis~ nlohmann_json.natvis
-	@$(MAKE) macro_builder_check
+	@status=0; \
+	banner() { printf '===================================================================\n  %s\n===================================================================\n' "$$1"; }; \
+	for FILE in $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE) BUILD.bazel nlohmann_json.natvis; do \
+	    mv "$$FILE" "$$FILE~" || exit 1; \
+	done; \
+	$(MAKE) amalgamate || status=1; \
+	$(MAKE) BUILD.bazel || status=1; \
+	$(MAKE) natvis || status=1; \
+	for FILE in $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE); do \
+	    diff "$$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) $(AMALGAMATED_VIEW_FILE) BUILD.bazel nlohmann_json.natvis; do \
+	    mv "$$FILE~" "$$FILE"; \
+	done; \
+	$(MAKE) macro_builder_check || status=1; \
+	exit $$status

 # generate the Bazel BUILD file; phony, because a removed header would not trigger a rebuild
 BUILD.bazel:
@@ -188,7 +204,7 @@ json.tar.xz:
 # We use `-X` to make the resulting ZIP file reproducible, see
 # <https://content.pivotal.io/blog/barriers-to-deterministic-reproducible-zip-files>.
 include.zip: BUILD.bazel
-	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) BUILD.bazel MODULE.bazel meson.build meson_options.txt LICENSE.MIT
+	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE) BUILD.bazel MODULE.bazel meson.build meson_options.txt LICENSE.MIT

 # Create the files for a release and add signatures and hashes.
 release: include.zip json.tar.xz
@@ -198,11 +214,13 @@ release: include.zip json.tar.xz
 	gpg --armor --detach-sig $(AMALGAMATED_FILE)
 	gpg --armor --detach-sig $(AMALGAMATED_FWD_FILE)
 	gpg --armor --detach-sig $(AMALGAMATED_LITERALS_FILE)
+	gpg --armor --detach-sig $(AMALGAMATED_VIEW_FILE)
 	gpg --armor --detach-sig json.tar.xz
 	cp $(AMALGAMATED_FILE) release_files
 	cp $(AMALGAMATED_FWD_FILE) release_files
 	cp $(AMALGAMATED_LITERALS_FILE) release_files
-	mv $(AMALGAMATED_FILE).asc $(AMALGAMATED_FWD_FILE).asc $(AMALGAMATED_LITERALS_FILE).asc json.tar.xz json.tar.xz.asc include.zip include.zip.asc release_files
+	cp $(AMALGAMATED_VIEW_FILE) release_files
+	mv $(AMALGAMATED_FILE).asc $(AMALGAMATED_FWD_FILE).asc $(AMALGAMATED_LITERALS_FILE).asc $(AMALGAMATED_VIEW_FILE).asc json.tar.xz json.tar.xz.asc include.zip include.zip.asc release_files
 	cd release_files ; shasum -a 256 $$(find . -type f -not -name '*.asc' | sed 's|^\./||' | sort) > hashes.txt


@@ -212,8 +230,8 @@ release: include.zip json.tar.xz

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


@@ -48,6 +48,7 @@
  - [Pkg-config](#pkg-config)
 - [License](#license)
 - [Contact](#contact)
+- [Security](#security)
 - [Thanks](#thanks)
 - [Used third-party tools](#used-third-party-tools)
 - [Notes](#notes)
@@ -112,9 +113,9 @@ There is also a [**docset**](https://github.com/Kapeli/Dash-User-Contributions/t

 ## Quick reference

- **Constructors** [basic_json](https://json.nlohmann.me/api/basic_json/basic_json), [array](https://json.nlohmann.me/api/basic_json/array), [binary](https://json.nlohmann.me/api/basic_json/binary), [object](https://json.nlohmann.me/api/basic_json/object)
+- **Constructors**: [basic_json](https://json.nlohmann.me/api/basic_json/basic_json), [array](https://json.nlohmann.me/api/basic_json/array), [binary](https://json.nlohmann.me/api/basic_json/binary), [object](https://json.nlohmann.me/api/basic_json/object)
 - **Object inspection**: [type](https://json.nlohmann.me/api/basic_json/type), [operator value_t](https://json.nlohmann.me/api/basic_json/operator_value_t), [type_name](https://json.nlohmann.me/api/basic_json/type_name), [is_primitive](https://json.nlohmann.me/api/basic_json/is_primitive), [is_structured](https://json.nlohmann.me/api/basic_json/is_structured), [is_null](https://json.nlohmann.me/api/basic_json/is_null), [is_boolean](https://json.nlohmann.me/api/basic_json/is_boolean), [is_number](https://json.nlohmann.me/api/basic_json/is_number), [is_number_integer](https://json.nlohmann.me/api/basic_json/is_number_integer), [is_number_unsigned](https://json.nlohmann.me/api/basic_json/is_number_unsigned), [is_number_float](https://json.nlohmann.me/api/basic_json/is_number_float), [is_object](https://json.nlohmann.me/api/basic_json/is_object), [is_array](https://json.nlohmann.me/api/basic_json/is_array), [is_string](https://json.nlohmann.me/api/basic_json/is_string), [is_binary](https://json.nlohmann.me/api/basic_json/is_binary), [is_discarded](https://json.nlohmann.me/api/basic_json/is_discarded)
- **Value access**; [get](https://json.nlohmann.me/api/basic_json/get), [get_to](https://json.nlohmann.me/api/basic_json/get_to), [get_ptr](https://json.nlohmann.me/api/basic_json/get_ptr), [get_ref](https://json.nlohmann.me/api/basic_json/get_ref), [operator ValueType](https://json.nlohmann.me/api/basic_json/operator_ValueType), [get_binary](https://json.nlohmann.me/api/basic_json/get_binary)
+- **Value access**: [get](https://json.nlohmann.me/api/basic_json/get), [get_to](https://json.nlohmann.me/api/basic_json/get_to), [get_ptr](https://json.nlohmann.me/api/basic_json/get_ptr), [get_ref](https://json.nlohmann.me/api/basic_json/get_ref), [operator ValueType](https://json.nlohmann.me/api/basic_json/operator_ValueType), [get_binary](https://json.nlohmann.me/api/basic_json/get_binary)
 - **Element access**: [at](https://json.nlohmann.me/api/basic_json/at), [operator[]](https://json.nlohmann.me/api/basic_json/operator[]), [value](https://json.nlohmann.me/api/basic_json/value), [front](https://json.nlohmann.me/api/basic_json/front), [back](https://json.nlohmann.me/api/basic_json/back)
 - **Lookup**: [find](https://json.nlohmann.me/api/basic_json/find), [count](https://json.nlohmann.me/api/basic_json/count), [contains](https://json.nlohmann.me/api/basic_json/contains)
 - **Iterators**: [begin](https://json.nlohmann.me/api/basic_json/begin), [cbegin](https://json.nlohmann.me/api/basic_json/cbegin), [end](https://json.nlohmann.me/api/basic_json/end), [cend](https://json.nlohmann.me/api/basic_json/cend), [rbegin](https://json.nlohmann.me/api/basic_json/rbegin), [rend](https://json.nlohmann.me/api/basic_json/rend), [crbegin](https://json.nlohmann.me/api/basic_json/crbegin), [crend](https://json.nlohmann.me/api/basic_json/crend), [items](https://json.nlohmann.me/api/basic_json/items)
@@ -1184,9 +1185,17 @@ binary[1]; // 0xFE
 binary.set_subtype(0x10);

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

+### Zero-copy views
+
+Header `<nlohmann/json_view.hpp>` adds `json_document`/`json_view`, a read-only, non-owning way to look at a parsed
+JSON text: parsing builds a flat index (16 bytes per value) instead of a tree, strings and numbers stay in the source
+text, and `materialize()` builds a `json` value for a subtree only when you actually need one. See
+[Zero-copy JSON views](https://json.nlohmann.me/features/json_view/) for the details, including which inputs are
+borrowed and which are copied.
+
 ## Customers

 The library is used in multiple projects, applications, operating systems, etc. The list below is not exhaustive, but the result of an internet search. If you know further customers of the library, please let me know, see [contact](#contact).
@@ -1220,17 +1229,7 @@ I would be happy to learn about other compilers/versions.
 Please note:

 - GCC 4.8 has a bug [57824](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57824): multiline raw strings cannot be the arguments to macros. Don't use multiline raw strings directly in macros with this compiler.
- Android defaults to using very old compilers and C++ libraries. To fix this, add the following to your `Application.mk`. This will switch to the LLVM C++ library, the Clang compiler, and enable C++11 and other features disabled by default.
-
-    ```makefile
-    APP_STL := c++_shared
-    NDK_TOOLCHAIN_VERSION := clang3.6
-    APP_CPPFLAGS += -frtti -fexceptions
-    ```
-
-    The code compiles successfully with [Android NDK](https://developer.android.com/ndk/index.html?hl=ml), Revision 9 - 11 (and possibly later) and [CrystaX's Android NDK](https://www.crystax.net/en/android/ndk) version 10.
-
- For GCC running on MinGW or Android SDK, the error `'to_string' is not a member of 'std'` (or similarly, for `strtod` or `strtof`) may occur. Note this is not an issue with the code, but rather with the compiler itself. On Android, see above to build with a newer environment.  For MinGW, please refer to [this site](https://tehsausage.com/mingw-to-string) and [this discussion](https://github.com/nlohmann/json/issues/136) for information on how to fix this bug. For Android NDK using `APP_STL := gnustl_static`, please refer to [this discussion](https://github.com/nlohmann/json/issues/219).
+- For GCC running on MinGW or Android, the error `'to_string' is not a member of 'std'` (or similarly, for `strtod` or `strtof`) may occur. Note this is not an issue with the code, but rather with the compiler or C++ standard library itself: use a recent toolchain (for Android, a current [NDK](https://developer.android.com/ndk) with the LLVM C++ library `APP_STL := c++_shared`, and for MinGW, a distribution with a complete C++11 standard library). See [this discussion](https://github.com/nlohmann/json/issues/136) for MinGW and [this discussion](https://github.com/nlohmann/json/issues/219) for the old Android NDK using `APP_STL := gnustl_static`.

 - Unsupported versions of GCC and Clang are rejected by `#error` directives. This can be switched off by defining `JSON_SKIP_UNSUPPORTED_COMPILER_CHECK`. Note that you can expect no support in this case.

@@ -1394,9 +1393,11 @@ THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR I

 - The class contains the UTF-8 Decoder from Bjoern Hoehrmann which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above). Copyright &copy; 2008-2009 [Björn Hoehrmann](https://bjoern.hoehrmann.de/) <bjoern@hoehrmann.de>
 - 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 port of the shortest double-to-decimal conversion of [Żmij](https://github.com/vitaut/zmij) by Victor Zverovich, including the conversion of the digits to text by Xiang JunBo and the SIMD instruction sequence of Dougall Johnson, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above). Copyright &copy; 2025 [Victor Zverovich](https://github.com/vitaut)
 - 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
+- The view's parser (`<nlohmann/json_view.hpp>`) contains techniques and code adapted from [yyjson](https://github.com/ibireme/yyjson) by YaoYuan, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above): table-driven decoding of `\u` escapes and fixed-offset unrolled checks.

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

@@ -1437,436 +1438,416 @@ I deeply appreciate the help of the following people.
 12. [kepkin](https://github.com/kepkin) patiently pushed forward the support for Microsoft Visual Studio.
 13. [gregmarr](https://github.com/gregmarr) simplified the implementation of reverse iterators and helped with numerous hints and improvements. In particular, he pushed forward the implementation of user-defined types.
 14. [Caio Luppi](https://github.com/caiovlp) fixed a bug in the Unicode handling.
-15. [dariomt](https://github.com/dariomt) fixed some typos in the examples.
+15. [dariomt](https://github.com/dariomt) fixed some typos in the examples and fixed a subtlety in MSVC type support and implemented the `get_ref()` function to get a reference to stored values.
 16. [Daniel Frey](https://github.com/d-frey) cleaned up some pointers and implemented exception-safe memory allocation.
 17. [Colin Hirsch](https://github.com/ColinH) took care of a small namespace issue.
 18. [Huu Nguyen](https://github.com/whoshuu) corrected a variable name in the documentation.
 19. [Silverweed](https://github.com/silverweed) overloaded `parse()` to accept an rvalue reference.
-20. [dariomt](https://github.com/dariomt) fixed a subtlety in MSVC type support and implemented the `get_ref()` function to get a reference to stored values.
-21. [ZahlGraf](https://github.com/ZahlGraf) added a workaround that allows compilation using Android NDK.
-22. [whackashoe](https://github.com/whackashoe) replaced a function that was marked as unsafe by Visual Studio.
-23. [406345](https://github.com/406345) fixed two small warnings.
-24. [Glen Fernandes](https://github.com/glenfe) noted a potential portability problem in the `has_mapped_type` function.
-25. [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
-26. [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping. He further added support for unsigned integer numbers and implemented better roundtrip support for parsed numbers.
-27. [Volker Diels-Grabsch](https://github.com/vog) fixed a link in the README file.
-28. [msm-](https://github.com/msm-) added support for American Fuzzy Lop.
-29. [Annihil](https://github.com/Annihil) fixed an example in the README file.
-30. [Themercee](https://github.com/Themercee) noted a wrong URL in the README file.
-31. [Lv Zheng](https://github.com/lv-zheng) fixed a namespace issue with `int64_t` and `uint64_t`.
-32. [abc100m](https://github.com/abc100m) analyzed the issues with GCC 4.8 and proposed a [partial solution](https://github.com/nlohmann/json/pull/212).
-33. [zewt](https://github.com/zewt) added useful notes to the README file about Android.
-34. [Róbert Márki](https://github.com/robertmrk) added a fix to use move iterators and improved the integration via CMake.
-35. [Chris Kitching](https://github.com/ChrisKitching) cleaned up the CMake files.
-36. [Tom Needham](https://github.com/06needhamt) fixed a subtle bug with MSVC 2015 which was also proposed by [Michael K.](https://github.com/Epidal).
-37. [Mário Feroldi](https://github.com/thelostt) fixed a small typo.
-38. [duncanwerner](https://github.com/duncanwerner) found a really embarrassing performance regression in the 2.0.0 release.
-39. [Damien](https://github.com/dtoma) fixed one of the last conversion warnings.
-40. [Thomas Braun](https://github.com/t-b) fixed a warning in a test case and adjusted MSVC calls in the CI.
-41. [Théo DELRIEU](https://github.com/theodelrieu) patiently and constructively oversaw the long way toward [iterator-range parsing](https://github.com/nlohmann/json/issues/290). He also implemented the magic behind the serialization/deserialization of user-defined types and split the single header file into smaller chunks.
-42. [Stefan](https://github.com/5tefan) fixed a minor issue in the documentation.
-43. [Vasil Dimov](https://github.com/vasild) fixed the documentation regarding conversions from `std::multiset`.
-44. [ChristophJud](https://github.com/ChristophJud) overworked the CMake files to ease project inclusion.
-45. [Vladimir Petrigo](https://github.com/vpetrigo) made a SFINAE hack more readable and added Visual Studio 17 to the build matrix.
-46. [Denis Andrejew](https://github.com/seeekr) fixed a grammar issue in the README file.
-47. [Pierre-Antoine Lacaze](https://github.com/palacaze) found a subtle bug in the `dump()` function.
-48. [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](https://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
-49. [cgzones](https://github.com/cgzones) had an idea how to fix the Coverity scan.
-50. [Jared Grubb](https://github.com/jaredgrubb) silenced a nasty documentation warning.
-51. [Yixin Zhang](https://github.com/qwename) fixed an integer overflow check.
-52. [Bosswestfalen](https://github.com/Bosswestfalen) merged two iterator classes into a smaller one.
-53. [Daniel599](https://github.com/Daniel599) helped to get Travis to execute the tests with Clang's sanitizers.
-54. [Jonathan Lee](https://github.com/vjon) fixed an example in the README file.
-55. [gnzlbg](https://github.com/gnzlbg) supported the implementation of user-defined types.
-56. [Alexej Harm](https://github.com/qis) helped to get the user-defined types working with Visual Studio.
-57. [Jared Grubb](https://github.com/jaredgrubb) supported the implementation of user-defined types.
-58. [EnricoBilla](https://github.com/EnricoBilla) noted a typo in an example.
-59. [Martin Hořeňovský](https://github.com/horenmar) found a way for a 2x speedup for the compilation time of the test suite.
-60. [ukhegg](https://github.com/ukhegg) proposed an improvement for the examples section.
-61. [rswanson-ihi](https://github.com/rswanson-ihi) noted a typo in the README.
-62. [Mihai Stan](https://github.com/stanmihai4) fixed a bug in the comparison with `nullptr`s.
-63. [Tushar Maheshwari](https://github.com/tusharpm) added [cotire](https://github.com/sakra/cotire) support to speed up the compilation.
-64. [TedLyngmo](https://github.com/TedLyngmo) noted a typo in the README, removed unnecessary bit arithmetic, and fixed some `-Weffc++` warnings.
-65. [Krzysztof Woś](https://github.com/krzysztofwos) made exceptions more visible.
-66. [ftillier](https://github.com/ftillier) fixed a compiler warning.
-67. [tinloaf](https://github.com/tinloaf) made sure all pushed warnings are properly popped.
-68. [Fytch](https://github.com/Fytch) found a bug in the documentation.
-69. [Jay Sistar](https://github.com/Type1J) implemented a Meson build description.
-70. [Henry Lee](https://github.com/HenryRLee) fixed a warning in ICC and improved the iterator implementation.
-71. [Vincent Thiery](https://github.com/vthiery) maintains a package for the Conan package manager.
-72. [Steffen](https://github.com/koemeet) fixed a potential issue with MSVC and `std::min`.
-73. [Mike Tzou](https://github.com/Chocobo1) fixed some typos.
-74. [amrcode](https://github.com/amrcode) noted misleading documentation about comparison of floats.
-75. [Oleg Endo](https://github.com/olegendo) reduced the memory consumption by replacing `<iostream>` with `<iosfwd>`.
-76. [dan-42](https://github.com/dan-42) cleaned up the CMake files to simplify including/reusing of the library.
-77. [Nikita Ofitserov](https://github.com/himikof) allowed for moving values from initializer lists.
-78. [Greg Hurrell](https://github.com/wincent) fixed a typo.
-79. [Dmitry Kukovinets](https://github.com/DmitryKuk) fixed a typo.
-80. [kbthomp1](https://github.com/kbthomp1) fixed an issue related to the Intel OSX compiler.
-81. [Markus Werle](https://github.com/daixtrose) fixed a typo.
-82. [WebProdPP](https://github.com/WebProdPP) fixed a subtle error in a precondition check.
-83. [Alex](https://github.com/leha-bot) noted an error in a code sample.
-84. [Tom de Geus](https://github.com/tdegeus) reported some warnings with ICC and helped to fix them.
-85. [Perry Kundert](https://github.com/pjkundert) simplified reading from input streams.
-86. [Sonu Lohani](https://github.com/sonulohani) fixed a small compilation error.
-87. [Jamie Seward](https://github.com/jseward) fixed all MSVC warnings.
-88. [Nate Vargas](https://github.com/eld00d) added a Doxygen tag file.
-89. [pvleuven](https://github.com/pvleuven) helped to fix a warning in ICC.
-90. [Pavel](https://github.com/crea7or) helped to fix some warnings in MSVC.
-91. [Jamie Seward](https://github.com/jseward) avoided unnecessary string copies in `find()` and `count()`.
-92. [Mitja](https://github.com/Itja) fixed some typos.
-93. [Jorrit Wronski](https://github.com/jowr) updated the Hunter package links.
-94. [Matthias Möller](https://github.com/TinyTinni) added a `.natvis` for the MSVC debug view.
-95. [bogemic](https://github.com/bogemic) fixed some C++17 deprecation warnings.
-96. [Eren Okka](https://github.com/erengy) fixed some MSVC warnings.
-97. [abolz](https://github.com/abolz) integrated the Grisu2 algorithm for proper floating-point formatting, allowing more roundtrip checks to succeed.
-98. [Vadim Evard](https://github.com/Pipeliner) fixed a Markdown issue in the README.
-99. [zerodefect](https://github.com/zerodefect) fixed a compiler warning.
-100. [Kert](https://github.com/kaidokert) allowed to template the string type in the serialization and added the possibility to override the exceptional behavior.
-101. [mark-99](https://github.com/mark-99) helped fix an ICC error.
-102. [Patrik Huber](https://github.com/patrikhuber) fixed links in the README file.
-103. [johnfb](https://github.com/johnfb) found a bug in the implementation of CBOR's indefinite length strings.
-104. [Paul Fultz II](https://github.com/pfultz2) added a note on the cget package manager.
-105. [Wilson Lin](https://github.com/wla80) made the integration section of the README more concise.
-106. [RalfBielig](https://github.com/ralfbielig) detected and fixed a memory leak in the parser callback.
-107. [agrianius](https://github.com/agrianius) allowed dumping JSON to an alternative string type.
-108. [Kevin Tonon](https://github.com/ktonon) overworked the C++11 compiler checks in CMake.
-109. [Axel Huebl](https://github.com/ax3l) simplified a CMake check and added support for the [Spack package manager](https://spack.io).
-110. [Carlos O'Ryan](https://github.com/coryan) fixed a typo.
-111. [James Upjohn](https://github.com/jupjohn) fixed a version number in the compilers section.
-112. [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines and provided documentation for the CMake integration.
-113. [Jan Schöppach](https://github.com/dns13) fixed a typo.
-114. [martin-mfg](https://github.com/martin-mfg) fixed a typo.
-115. [Matthias Möller](https://github.com/TinyTinni) removed the dependency from `std::stringstream`.
-116. [agrianius](https://github.com/agrianius) added code to use alternative string implementations.
-117. [Daniel599](https://github.com/Daniel599) allowed to use more algorithms with the `items()` function.
-118. [Julius Rakow](https://github.com/juliusrakow) fixed the Meson include directory and fixed the links to [cppreference.com](https://cppreference.com).
-119. [Sonu Lohani](https://github.com/sonulohani) fixed the compilation with MSVC 2015 in debug mode.
-120. [grembo](https://github.com/grembo) fixed the test suite and re-enabled several test cases.
-121. [Hyeon Kim](https://github.com/simnalamburt) introduced the macro `JSON_INTERNAL_CATCH` to control the exception handling inside the library.
-122. [thyu](https://github.com/thyu) fixed a compiler warning.
-123. [David Guthrie](https://github.com/LEgregius) fixed a subtle compilation error with Clang 3.4.2.
-124. [Dennis Fischer](https://github.com/dennisfischer) allowed to call `find_package` without installing the library.
-125. [Hyeon Kim](https://github.com/simnalamburt) fixed an issue with a double macro definition.
-126. [Ben Berman](https://github.com/rivertam) made some error messages more understandable.
-127. [zakalibit](https://github.com/zakalibit) fixed a compilation problem with the Intel C++ compiler.
-128. [mandreyel](https://github.com/mandreyel) fixed a compilation problem.
-129. [Kostiantyn Ponomarenko](https://github.com/koponomarenko) added version and license information to the Meson build file.
-130. [Henry Schreiner](https://github.com/henryiii) added support for GCC 4.8.
-131. [knilch](https://github.com/knilch0r) made sure the test suite does not stall when run in the wrong directory.
-132. [Antonio Borondo](https://github.com/antonioborondo) fixed an MSVC 2017 warning.
-133. [Dan Gendreau](https://github.com/dgendreau) implemented the `NLOHMANN_JSON_SERIALIZE_ENUM` macro to quickly define an enum/JSON mapping.
-134. [efp](https://github.com/efp) added line and column information to parse errors.
-135. [julian-becker](https://github.com/julian-becker) added BSON support.
-136. [Pratik Chowdhury](https://github.com/pratikpc) added support for structured bindings.
-137. [David Avedissian](https://github.com/davedissian) added support for Clang 5.0.1 (PS4 version).
-138. [Jonathan Dumaresq](https://github.com/dumarjo) implemented an input adapter to read from `FILE*`.
-139. [kjpus](https://github.com/kjpus) fixed a link in the documentation.
-140. [Manvendra Singh](https://github.com/manu-chroma) fixed a typo in the documentation.
-141. [ziggurat29](https://github.com/ziggurat29) fixed an MSVC warning.
-142. [Sylvain Corlay](https://github.com/SylvainCorlay) added code to avoid an issue with MSVC.
-143. [mefyl](https://github.com/mefyl) fixed a bug when JSON was parsed from an input stream.
-144. [Millian Poquet](https://github.com/mpoquet) allowed to install the library via Meson.
-145. [Michael Behrns-Miller](https://github.com/moodboom) found an issue with a missing namespace.
-146. [Nasztanovics Ferenc](https://github.com/naszta) fixed a compilation issue with libc 2.12.
-147. [Andreas Schwab](https://github.com/andreas-schwab) fixed the endian conversion.
-148. [Mark-Dunning](https://github.com/Mark-Dunning) fixed a warning in MSVC.
-149. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) added `operator/` for JSON Pointers.
-150. [John-Mark](https://github.com/johnmarkwayve) noted a missing header.
-151. [Vitaly Zaitsev](https://github.com/xvitaly) fixed compilation with GCC 9.0.
-152. [Laurent Stacul](https://github.com/stac47) fixed compilation with GCC 9.0.
-153. [Ivor Wanders](https://github.com/iwanders) helped to reduce the CMake requirement to version 3.1.
-154. [njlr](https://github.com/njlr) updated the Buckaroo instructions.
-155. [Lion](https://github.com/lieff) fixed a compilation issue with GCC 7 on CentOS.
-156. [Isaac Nickaein](https://github.com/nickaein) improved the integer serialization performance and implemented the `contains()` function.
-157. [past-due](https://github.com/past-due) suppressed an unfixable warning.
-158. [Elvis Oric](https://github.com/elvisoric) improved Meson support.
-159. [Matěj Plch](https://github.com/Afforix) fixed an example in the README.
-160. [Mark Beckwith](https://github.com/wythe) fixed a typo.
-161. [scinart](https://github.com/scinart) fixed a bug in the serializer.
-162. [Patrick Boettcher](https://github.com/pboettch) implemented `push_back()` and `pop_back()` for JSON Pointers.
-163. [Bruno Oliveira](https://github.com/nicoddemus) added support for Conda.
-164. [Michele Caini](https://github.com/skypjack) fixed links in the README.
-165. [Hani](https://github.com/hnkb) documented how to install the library with NuGet.
-166. [Mark Beckwith](https://github.com/wythe) fixed a typo.
-167. [yann-morin-1998](https://github.com/yann-morin-1998) helped to reduce the CMake requirement to version 3.1.
-168. [Konstantin Podsvirov](https://github.com/podsvirov) maintains a package for the MSYS2 software distro.
-169. [remyabel](https://github.com/remyabel2) added GNUInstallDirs to the CMake files.
-170. [Taylor Howard](https://github.com/taylorhoward92) fixed a unit test.
-171. [Gabe Ron](https://github.com/Macr0Nerd) implemented the `to_string` method.
-172. [Watal M. Iwasaki](https://github.com/heavywatal) fixed a Clang warning.
-173. [Viktor Kirilov](https://github.com/onqtam) switched the unit tests from [Catch](https://github.com/philsquared/Catch) to [doctest](https://github.com/onqtam/doctest)
-174. [Juncheng E](https://github.com/ejcjason) fixed a typo.
-175. [tete17](https://github.com/tete17) fixed a bug in the `contains` function.
-176. [Xav83](https://github.com/Xav83) fixed some cppcheck warnings.
-177. [0xflotus](https://github.com/0xflotus) fixed some typos.
-178. [Christian Deneke](https://github.com/chris0x44) added a const version of `json_pointer::back`.
-179. [Julien Hamaide](https://github.com/crazyjul) made the `items()` function work with custom string types.
-180. [Evan Nemerson](https://github.com/nemequ) updated fixed a bug in Hedley and updated this library accordingly.
-181. [Florian Pigorsch](https://github.com/flopp) fixed a lot of typos.
-182. [Camille Bégué](https://github.com/cbegue) fixed an issue in the conversion from  `std::pair` and `std::tuple` to `json`.
-183. [Anthony VH](https://github.com/AnthonyVH) fixed a compile error in an enum deserialization.
-184. [Yuriy Vountesmery](https://github.com/ua-code-dragon) noted a subtle bug in a preprocessor check.
-185. [Chen](https://github.com/dota17) fixed numerous issues in the library.
-186. [Antony Kellermann](https://github.com/aokellermann) added a CI step for GCC 10.1.
-187. [Alex](https://github.com/gistrec) fixed an MSVC warning.
-188. [Rainer](https://github.com/rvjr) proposed an improvement in the floating-point serialization in CBOR.
-189. [Francois Chabot](https://github.com/FrancoisChabot) made performance improvements in the input adapters.
-190. [Arthur Sonzogni](https://github.com/ArthurSonzogni) documented how the library can be included via `FetchContent`.
-191. [Rimas Misevičius](https://github.com/rmisev) fixed an error message.
-192. [Alexander Myasnikov](https://github.com/alexandermyasnikov) fixed some examples and a link in the README.
-193. [Hubert Chathi](https://github.com/uhoreg) made CMake's version config file architecture-independent.
-194. [OmnipotentEntity](https://github.com/OmnipotentEntity) implemented the binary values for CBOR, MessagePack, BSON, and UBJSON.
-195. [ArtemSarmini](https://github.com/ArtemSarmini) fixed a compilation issue with GCC 10 and fixed a leak.
-196. [Evgenii Sopov](https://github.com/sea5kg) integrated the library to the wsjcpp package manager.
-197. [Sergey Linev](https://github.com/linev) fixed a compiler warning.
-198. [Miguel Magalhães](https://github.com/magamig) fixed the year in the copyright.
-199. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) fixed a compilation issue with MSVC.
-200. [Alexander “weej” Jones](https://github.com/alex-weej) fixed an example in the README.
-201. [Antoine Cœur](https://github.com/Coeur) fixed some typos in the documentation.
-202. [jothepro](https://github.com/jothepro) updated links to the Hunter package.
-203. [Dave Lee](https://github.com/kastiglione) fixed a link in the README.
-204. [Joël Lamotte](https://github.com/Klaim) added instruction for using Build2's package manager.
-205. [Paul Jurczak](https://github.com/pauljurczak) fixed an example in the README.
-206. [Sonu Lohani](https://github.com/sonulohani) fixed a warning.
-207. [Carlos Gomes Martinho](https://github.com/gocarlos) updated the Conan package source.
-208. [Konstantin Podsvirov](https://github.com/podsvirov) fixed the MSYS2 package documentation.
-209. [Tridacnid](https://github.com/Tridacnid) improved the CMake tests.
-210. [Michael](https://github.com/MBalszun) fixed MSVC warnings.
-211. [Quentin Barbarat](https://github.com/quentin-dev) fixed an example in the documentation.
-212. [XyFreak](https://github.com/XyFreak) fixed a compiler warning.
-213. [TotalCaesar659](https://github.com/TotalCaesar659) fixed links in the README.
-214. [Tanuj Garg](https://github.com/tanuj208) improved the fuzzer coverage for UBSAN input.
-215. [AODQ](https://github.com/AODQ) fixed a compiler warning.
-216. [jwittbrodt](https://github.com/jwittbrodt) made `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE` inline.
-217. [pfeatherstone](https://github.com/pfeatherstone) improved the upper bound of arguments of the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
-218. [Jan Procházka](https://github.com/jprochazk) fixed a bug in the CBOR parser for binary and string values.
-219. [T0b1-iOS](https://github.com/T0b1-iOS) fixed a bug in the new hash implementation.
-220. [Matthew Bauer](https://github.com/matthewbauer) adjusted the CBOR writer to create tags for binary subtypes.
-221. [gatopeich](https://github.com/gatopeich) implemented an ordered map container for `nlohmann::ordered_json`.
-222. [Érico Nogueira Rolim](https://github.com/ericonr) added support for pkg-config.
-223. [KonanM](https://github.com/KonanM) proposed an implementation for the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
-224. [Guillaume Racicot](https://github.com/gracicot) implemented `string_view` support and allowed C++20 support.
-225. [Alex Reinking](https://github.com/alexreinking) improved CMake support for `FetchContent`.
-226. [Hannes Domani](https://github.com/ssbssa) provided a GDB pretty printer.
-227. Lars Wirzenius reviewed the README file.
-228. [Jun Jie](https://github.com/ongjunjie) fixed a compiler path in the CMake scripts.
-229. [Ronak Buch](https://github.com/rbuch) fixed typos in the documentation.
-230. [Alexander Karzhenkov](https://github.com/karzhenkov) fixed a move constructor and the Travis builds.
-231. [Leonardo Lima](https://github.com/leozz37) added CPM.Cmake support.
-232. [Joseph Blackman](https://github.com/jbzdarkid) fixed a warning.
-233. [Yaroslav](https://github.com/YarikTH) updated doctest and implemented unit tests.
-234. [Martin Stump](https://github.com/globberwops) fixed a bug in the CMake files.
-235. [Jaakko Moisio](https://github.com/jasujm) fixed a bug in the input adapters.
-236. [bl-ue](https://github.com/bl-ue) fixed some Markdown issues in the README file.
-237. [William A. Wieselquist](https://github.com/wawiesel) fixed an example from the README.
-238. [abbaswasim](https://github.com/abbaswasim) fixed an example from the README.
-239. [Remy Jette](https://github.com/remyjette) fixed a warning.
-240. [Fraser](https://github.com/frasermarlow) fixed the documentation.
-241. [Ben Beasley](https://github.com/musicinmybrain) updated doctest.
-242. [Doron Behar](https://github.com/doronbehar) fixed pkg-config.pc.
-243. [raduteo](https://github.com/raduteo) fixed a warning.
-244. [David Pfahler](https://github.com/theShmoo) added the possibility to compile the library without I/O support.
-245. [Morten Fyhn Amundsen](https://github.com/mortenfyhn) fixed a typo.
-246. [jpl-mac](https://github.com/jpl-mac) allowed treating the library as a system header in CMake.
-247. [Jason Dsouza](https://github.com/jasmcaus) fixed the indentation of the CMake file.
-248. [offa](https://github.com/offa) added a link to Conan Center to the documentation.
-249. [TotalCaesar659](https://github.com/TotalCaesar659) updated the links in the documentation to use HTTPS.
-250. [Rafail Giavrimis](https://github.com/grafail) fixed the Google Benchmark default branch.
-251. [Louis Dionne](https://github.com/ldionne) fixed a conversion operator.
-252. [justanotheranonymoususer](https://github.com/justanotheranonymoususer) made the examples in the README more consistent.
-253. [Finkman](https://github.com/Finkman) suppressed some `-Wfloat-equal` warnings.
-254. [Ferry Huberts](https://github.com/fhuberts) fixed `-Wswitch-enum` warnings.
-255. [Arseniy Terekhin](https://github.com/senyai) made the GDB pretty-printer robust against unset variable names.
-256. [Amir Masoud Abdol](https://github.com/amirmasoudabdol) updated the Homebrew command as nlohmann/json is now in homebrew-core.
-257. [Hallot](https://github.com/Hallot) fixed some `-Wextra-semi-stmt warnings`.
-258. [Giovanni Cerretani](https://github.com/gcerretani) fixed `-Wunused` warnings on `JSON_DIAGNOSTICS`.
-259. [Bogdan Popescu](https://github.com/Kapeli) hosts the [docset](https://github.com/Kapeli/Dash-User-Contributions/tree/master/docsets/JSON_for_Modern_C%2B%2B) for offline documentation viewers.
-260. [Carl Smedstad](https://github.com/carlsmedstad) fixed an assertion error when using `JSON_DIAGNOSTICS`.
-261. [miikka75](https://github.com/miikka75) provided an important fix to compile C++17 code with Clang 9.
-262. [Maarten Becker](https://github.com/kernie) fixed a warning for shadowed variables.
-263. [Cristi Vîjdea](https://github.com/axnsan12) fixed typos in the `operator[]` documentation.
-264. [Alex Beregszaszi](https://github.com/axic) fixed spelling mistakes in comments.
-265. [Dirk Stolle](https://github.com/striezel) fixed typos in documentation.
-266. [Daniel Albuschat](https://github.com/daniel-kun) corrected the parameter name in the `parse` documentation.
-267. [Prince Mendiratta](https://github.com/Prince-Mendiratta) fixed a link to the FAQ.
-268. [Florian Albrechtskirchinger](https://github.com/falbrechtskirchinger) implemented `std::string_view` support for object keys and made dozens of other improvements.
-269. [Qianqian Fang](https://github.com/fangq) implemented the Binary JData (BJData) format.
-270. [pketelsen](https://github.com/pketelsen) added macros `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` and `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT`.
-271. [DarkZeros](https://github.com/DarkZeros) adjusted to code to not clash with Arduino defines.
-272. [flagarde](https://github.com/flagarde) fixed the output of `meta()` for MSVC.
-273. [Giovanni Cerretani](https://github.com/gcerretani) fixed a check for `std::filesystem`.
-274. [Dimitris Apostolou](https://github.com/rex4539) fixed a typo.
-275. [Ferry Huberts](https://github.com/fhuberts) fixed a typo.
-276. [Michael Nosthoff](https://github.com/heinemml) fixed a typo.
-277. [JungHoon Lee](https://github.com/jhnlee) fixed a typo.
-278. [Faruk D.](https://github.com/fdiblen) fixed the CITATION.CFF file.
-279. [Andrea Cocito](https://github.com/puffetto) added a clarification on macro usage to the documentation.
-280. [Krzysiek Karbowiak](https://github.com/kkarbowiak) refactored the tests to use `CHECK_THROWS_WITH_AS`.
-281. [Chaoqi Zhang](https://github.com/prncoprs) fixed a typo.
-282. [ivanovmp](https://github.com/ivanovmp) fixed a whitespace error.
-283. [KsaNL](https://github.com/KsaNL) fixed a build error when including `<windows.h>`.
-284. [Andrea Pappacoda](https://github.com/Tachi107) moved `.pc` and `.cmake` files to `share` directory.
-285. [Wolf Vollprecht](https://github.com/wolfv) added the `patch_inplace` function.
-286. [Jake Zimmerman](https://github.com/jez) highlighted common usage patterns in the README file.
-287. [NN](https://github.com/NN---) added the Visual Studio output directory to `.gitignore`.
-288. [Romain Reignier](https://github.com/romainreignier) improved the performance of the vector output adapter.
-289. [Mike](https://github.com/Mike-Leo-Smith) fixed the `std::iterator_traits`.
-290. [Richard Hozák](https://github.com/richardhozak) added macro `JSON_NO_ENUM` to disable default enum conversions.
-291. [vakokako](https://github.com/vakokako) fixed tests when compiling with C++20.
-292. [Alexander “weej” Jones](https://github.com/alexweej) fixed an example in the README.
-293. [Eli Schwartz](https://github.com/eli-schwartz) added more files to the `include.zip` archive.
-294. [Kevin Lu](https://github.com/kevinlul) fixed a compilation issue when typedefs with certain names were present.
-295. [Trevor Hickey](https://github.com/luxe) improved the description of an example.
-296. [Jef LeCompte](https://github.com/jef) updated the year in the README file.
-297. [Alexandre Hamez](https://github.com/ahamez) fixed a warning.
-298. [Maninderpal Badhan](https://github.com/mbadhan) fixed a typo.
-299. [kevin--](https://github.com/kevin--) added a note to an example in the README file.
-300. [I](https://github.com/wx257osn2) fixed a typo.
-301. [Gregorio Litenstein](https://github.com/Lord-Kamina) fixed the Clang detection.
-302. [Andreas Smas](https://github.com/andoma) added a Doozer badge.
-303. [WanCW](https://github.com/wancw) fixed the string conversion with Clang.
-304. [zhaohuaxishi](https://github.com/zhaohuaxishi) fixed a Doxygen error.
-305. [emvivre](https://github.com/emvivre) removed an invalid parameter from CMake.
-306. [Tobias Hermann](https://github.com/Dobiasd) fixed a link in the README file.
-307. [Michael](https://github.com/traits) fixed a warning.
-308. [Ryan Mulder](https://github.com/ryanjmulder) added `ensure_ascii` to the `dump` function.
-309. [Muri Nicanor](https://github.com/murinicanor) fixed the `sed` discovery in the Makefile.
-310. [David Avedissian](https://github.com/dgavedissian) implemented SFINAE-friendly `iterator_traits`.
-311. [AQNOUCH Mohammed](https://github.com/aqnouch) fixed a typo in the README.
-312. [Gareth Sylvester-Bradley](https://github.com/garethsb) added `operator/=` and `operator/` to construct JSON pointers.
-313. [Michael Macnair](https://github.com/mykter) added support for afl-fuzz testing.
-314. [Berkus Decker](https://github.com/berkus) fixed a typo in the README.
-315. [Illia Polishchuk](https://github.com/ilqvya) improved the CMake testing.
-316. [Ikko Ashimine](https://github.com/eltociear) fixed a typo.
-317. [Raphael Grimm](https://github.com/barcode) added the possibility to define a custom base class.
-318. [tocic](https://github.com/tocic) fixed typos in the documentation.
-319. [Vertexwahn](https://github.com/Vertexwahn) added Bazel build support.
-320. [Dirk Stolle](https://github.com/striezel) fixed typos in the documentation.
-321. [DavidKorczynski](https://github.com/DavidKorczynski) added a CIFuzz CI GitHub action.
-322. [Finkman](https://github.com/Finkman) fixed the debug pretty-printer.
-323. [Florian Segginger](https://github.com/floriansegginger) bumped the years in the README.
-324. [haadfida](https://github.com/haadfida) cleaned up the badges of used services.
-325. [Arsen Arsenović](https://github.com/ArsenArsen) fixed a build error.
-326. [theevilone45](https://github.com/theevilone45) fixed a typo in a CMake file.
-327. [Sergei Trofimovich](https://github.com/trofi) fixed the custom allocator support.
-328. [Joyce](https://github.com/joycebrum) fixed some security issues in the GitHub workflows.
-329. [Nicolas Jakob](https://github.com/njakob) add vcpkg version badge.
-330. [Tomerkm](https://github.com/Tomerkm) added tests.
-331. [No.](https://github.com/tusooa) fixed the use of `get<>` calls.
-332. [taro](https://github.com/tarolling) fixed a typo in the `CODEOWNERS` file.
-333. [Ikko Eltociear Ashimine](https://github.com/eltociear) fixed a typo.
-334. [Felix Yan](https://github.com/felixonmars) fixed a typo in the README.
-335. [HO-COOH](https://github.com/HO-COOH) fixed a parenthesis in the documentation.
-336. [Ivor Wanders](https://github.com/iwanders) fixed the examples to catch exception by `const&`.
-337. [miny1233](https://github.com/miny1233) fixed a parenthesis in the documentation.
-338. [tomalakgeretkal](https://github.com/tomalakgeretkal) fixed a compilation error.
-339. [alferov](https://github.com/ALF-ONE) fixed a compilation error.
-340. [Craig Scott](https://github.com/craigscott-crascit) fixed a deprecation warning in CMake.
-341. [Vyacheslav Zhdanovskiy](https://github.com/ZeronSix) added macros for serialization-only types.
-342. [Mathieu Westphal](https://github.com/mwestphal) fixed typos.
-343. [scribam](https://github.com/scribam) fixed the MinGW workflow.
-344. [Aleksei Sapitskii](https://github.com/aleksproger) added support for Apple's Swift Package Manager.
-345. [Benjamin Buch](https://github.com/bebuch) fixed the installation path in CMake.
-346. [Colby Haskell](https://github.com/colbychaskell) clarified the parse error message in case a file cannot be opened.
-347. [Juan Carlos Arevalo Baeza](https://github.com/TheJCAB) fixed the enum conversion.
-348. [alferov](https://github.com/ALF-ONE) fixed a version in the documentation.
-349. [ss](https://github.com/serge-s) fixed the amalgamation call.
-350. [AniketDhemare](https://github.com/AniketDhemare) fixed a version in the documentation.
-351. [Philip Müller](https://github.com/philip-paul-mueller) fixed an example.
-352. [Leila Shcheglova](https://github.com/LeilaShcheglova) fixed a warning in a test.
-353. [Alex Prabhat Bara](https://github.com/alexprabhat99) fixed a function name in the documentation.
-354. [laterlaugh](https://github.com/laterlaugh) fixed some typos.
-355. [Yuanhao Jia](https://github.com/MrJia1997) fixed the GDB pretty printer.
-356. [Fallen_Breath](https://github.com/Fallen-Breath) fixed an example for JSON Pointer.
-357. [Nikhil Idiculla](https://github.com/tsnl) fixed some typos.
-358. [Griffin Myers](https://github.com/gmyers18) updated the Natvis file.
-359. [thetimr](https://github.com/thetimr) fixed a typo in the documentation.
-360. [Balazs Erseki](https://github.com/zerocukor287) fixed a URL in the contribution guidelines.
-361. [Niccolò Iardella](https://github.com/rotolof) added `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
-362. [Borislav Stanimirov](https://github.com/iboB) allowed overriding the CMake target name.
-363. [Captain Crutches](https://github.com/captaincrutches) made `iterator_proxy_value` a `std::forward_iterator`.
-364. [Fredrik Sandhei](https://github.com/fsandhei) added type conversion support for `std::optional`.
-365. [jh96](https://github.com/jordan-hoang) added exceptions when `nullptr` is passed to `parse`.
-366. [Stuart Gorman](https://github.com/StuartGorman) fixed number parsing when `EINTR` set in `errno`.
-367. [Dylan Baker](https://github.com/dcbaker) generated a pkg-config file that follows the pkg-config conventions.
-368. [Tianyi Chen](https://github.com/TianyiChen) optimized the binary `get_number` implementation.
-369. [peng-wang-cn](https://github.com/peng-wang-cn) added type conversion support for multidimensional arrays.
-370. [Einars Netlis-Galejs](https://github.com/EinarsNG) added `ONLY_SERIALIZE` for `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
-371. [Marcel](https://github.com/mering) removed `alwayslink=True` Bazel flag.
-372. [Harinath Nampally](https://github.com/hnampally) added diagnostic positions to exceptions.
-373. [Nissim Armand Ben Danan](https://github.com/NissimBendanan) fixed `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` with an empty JSON instance.
-374. [Michael Valladolid](https://github.com/codenut) added support for BSON uint64 serialization/deserialization.
-375. [Nikhil](https://github.com/nikhilreddydev) updated the documentation.
-376. [Nebojša Cvetković](https://github.com/nebkat) added support for BJDATA optimized binary array type.
-377. [Sushrut Shringarputale](https://github.com/sushshring) added support for diagnostic positions. 
-378. [kimci86](https://github.com/kimci86) templated to `NLOHMANN_DEFINE_TYPE` macros to also support `ordered_json`.
-379. [Richard Topchii](https://github.com/richardtop) added support for VisionOS in the Swift Package Manager.
-380. [Robert Chisholm](https://github.com/Robadob) fixed a typo.
-381. [zjyhjqs](https://github.com/zjyhjqs) added CPack support.
-382. [bitFiedler](https://github.com/bitFiedler) made GDB pretty printer work with Python 3.8.
-383. [Gianfranco Costamagna](https://github.com/LocutusOfBorg) fixed a compiler warning.
-384. [risa2000](https://github.com/risa2000) made `std::filesystem::path` conversion to/from UTF-8 encoded string explicit.
-385. [AM](https://github.com/maqnouch) fixed typos in the README.
-386. [dmenendez-gruposantander](https://github.com/dmenendez-gruposantander) fixed typos in the comments of the examples.
-387. [Mihai Stan](https://github.com/mstan-xx) fixed comparisons against the literal `0`.
-388. [Matt Gumbel](https://github.com/intelmatt) fixed some `-Weffc++` warnings.
-389. [vimpunk](https://github.com/vimpunk) moved a lambda out of an unevaluated context to support older compilers.
-390. [Chris Harris](https://github.com/cjh1) fixed the compilation with GCC 4.8.
-391. [Palmer Dabbelt](https://github.com/palmer-dabbelt) generated and installed a pkg-config file.
-392. [Gus Pozuelo](https://github.com/ap-viavi) made `ordered_map` compatible with GCC 5.5, Clang 3.6, and Xcode 9.
-393. [AK](https://github.com/Lioncky) fixed an MSVC build error caused by the `min`/`max` macros from `windows.h`.
-394. [Sergiu Deitsch](https://github.com/sergiud) provided a fallback for missing `char8_t` support.
-395. [Xiaochuan Ye](https://github.com/XueSongTap) fixed `from_msgpack` for `std::byte` input by specializing `std::char_traits`.
-396. [Ville Vesilehto](https://github.com/thevilledev) fixed an overflow in the BJData size calculation and rejected overflowing negative integers in CBOR.
-397. [NmPassTHFan](https://github.com/nmpassthf) replaced the deprecated `std::is_trivial` for C++26.
-398. [Chris Ever](https://github.com/chirsz-ever) added the `ignore_trailing_commas` parser option.
-399. [Kuan-Fu Wu](https://github.com/kfwu1999) fixed the example code for `json_pointer` initialization.
-400. [David Kilzer](https://github.com/ddkilzer) added a missing header to the input adapters.
-401. [Miko](https://github.com/mikomikotaishi) added proper C++20 module support, simplified the module API, and fixed missing exports.
-402. [hitgirl](https://github.com/hitgil) fixed the CMake configuration when cross-compiling.
-403. [Devon Thomas](https://github.com/ThomaDevOSU) mentioned the Artistic Style formatting in the contribution guidelines.
-404. [Erik Hu](https://github.com/Erikhu1) made Coveralls upload errors non-fatal in the CI.
-405. [co63oc](https://github.com/co63oc) fixed typos.
-406. [DmitriBogdanov](https://github.com/DmitriBogdanov) fixed broken package manager links in the documentation.
-407. [Bander](https://github.com/banderzhm) improved the MSVC compatibility of the C++ modules.
-408. [Andy Choi](https://github.com/ccpong) removed an unnecessary `template` keyword before `get` in the README and the documentation.
-409. [SamareshSingh](https://github.com/ssam18) fixed single-element brace initialization to copy/move instead of wrapping in an array, fixed the `WITH_DEFAULT` macros for `ordered_map`, and handled moved events in `serve_header.py`.
-410. [Aditya](https://github.com/Lumowhisp) improved the documentation of the documentation generation.
-411. [cheese1](https://github.com/cheese1) clarified the README.
-412. [KhloodElhossiny](https://github.com/khloodelhossiny) enabled `std::string_view` keys in `operator[]`.
-413. [Charles Cabergs](https://github.com/cacharle) fixed a `-Wtautological-constant-out-of-range-compare` warning.
-414. [EALePain](https://github.com/EALePain) made the `std::tuple` conversion work with reference types such as `std::tie`.
-415. [koala_oishi](https://github.com/chibi-dogs) fixed grammatical wording in the README.
-416. [riccardoori11](https://github.com/riccardoori11) fixed a typo in the documentation.
-417. [Swastik Bose](https://github.com/VasuBhakt) fixed the parent pointers after `update()` with `JSON_DIAGNOSTICS` and fixed the Doxygen autolinking of requirements.
-418. [trdesilva](https://github.com/trdesilva) added `front`, `pop_front`, and `push_front` to `json_pointer`.
-419. [Akhilesh Arora](https://github.com/akhilesharora) fixed an incomplete-type error with `ordered_json`.
-420. [Hariom Phulre](https://github.com/hariomphulre) fixed the C++20 modules compilation with GCC.
-421. [Kirill Lokotkov](https://github.com/RUSLoker) fixed printing `long double` values.
-422. [George Sedov](https://github.com/radistmorse) added the `NLOHMANN_DEFINE_TYPE_*_WITH_NAMES` macros.
-423. [Caillin Nugent](https://github.com/nugentcaillin) added the `NLOHMANN_JSON_SERIALIZE_ENUM_STRICT` macro.
-424. [Cosmin D.](https://github.com/drcosmin) fixed `std::filesystem::path` conversions and added an MSVC workaround for `std::unique_ptr`.
-425. [Paul Dreik](https://github.com/pauldreik) fixed a test relying on implementation-specific behavior.
-426. [Daniel Falk](https://github.com/daniel-falk) added missing copyright notices to the SBOM.
-427. [Federico Sfriso](https://github.com/federicosfriso05-dotcom) added support for constructing JSON values from C++20 range views.
-428. [Luke Banicevic](https://github.com/banaboi) fixed corrupt BSON output for lengths exceeding `INT32_MAX`, cleaned up the BSON writer, and improved the documentation.
-429. [Patrick Armstrong](https://github.com/Patrick10199) updated the CBOR references and the half-precision float assertions.
-430. [Yash Bavadiya](https://github.com/xevrion) added checks to all BSON reads.
-431. [hum4nBeing](https://github.com/hum4nBeing) fixed the overflow handling of high-precision numbers in UBJSON.
-432. [tomatotomata](https://github.com/tomatotomata) added checks for reading CBOR tagged subtypes.
-433. [YingqiDuan](https://github.com/YingqiDuan) documented the BSON interoperability.
-434. [KBS](https://github.com/youdie006) documented the standards compliance and the strictness of `parse()` and `operator>>`.
-435. [Petr Bělohlávek](https://github.com/petrbel) added Clang 21 and 22 to the CI.
-436. [Dmitry Rantovov](https://github.com/darkdi) fixed the placement of a CBOR documentation block.
-437. [ljcjclljc](https://github.com/ljcjclljc) fixed the comparison of large unsigned integers with signed integers.
-438. [Sahil Kamate](https://github.com/sahilkamate03) fixed the handling of CBOR tags 0-5 and 21-23.
-439. [Krishnanand G](https://github.com/Krishnanand-G) made the UBJSON writer reject `use_type` without `use_size`.
-440. [whn](https://github.com/Whning0513) documented the lenient BSON input handling and corrected the complexity of `to_bson`.
-441. [elix3r](https://github.com/22elix3r) fixed `update()` with `merge_objects` when merging a primitive into an object.
-442. [Avionic Harshit](https://github.com/avionicharshit-byte) made `diff()` linear when an array shrinks.
-443. [Qatadaha Bin Matloob](https://github.com/qatcod) fixed comparisons between integers and floats and fixed unparsable BJData output.
-444. [Wu Shuwen](https://github.com/dajiaohuang) removed an unused include.
+20. [ZahlGraf](https://github.com/ZahlGraf) added a workaround that allows compilation using Android NDK.
+21. [whackashoe](https://github.com/whackashoe) replaced a function that was marked as unsafe by Visual Studio.
+22. [406345](https://github.com/406345) fixed two small warnings.
+23. [Glen Fernandes](https://github.com/glenfe) noted a potential portability problem in the `has_mapped_type` function.
+24. [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
+25. [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping. He further added support for unsigned integer numbers and implemented better roundtrip support for parsed numbers.
+26. [Volker Diels-Grabsch](https://github.com/vog) fixed a link in the README file.
+27. [msm-](https://github.com/msm-) added support for American Fuzzy Lop.
+28. [Annihil](https://github.com/Annihil) fixed an example in the README file.
+29. [Themercee](https://github.com/Themercee) noted a wrong URL in the README file.
+30. [Lv Zheng](https://github.com/lv-zheng) fixed a namespace issue with `int64_t` and `uint64_t`.
+31. [abc100m](https://github.com/abc100m) analyzed the issues with GCC 4.8 and proposed a [partial solution](https://github.com/nlohmann/json/pull/212).
+32. [zewt](https://github.com/zewt) added useful notes to the README file about Android.
+33. [Róbert Márki](https://github.com/robertmrk) added a fix to use move iterators and improved the integration via CMake.
+34. [Chris Kitching](https://github.com/ChrisKitching) cleaned up the CMake files.
+35. [Tom Needham](https://github.com/06needhamt) fixed a subtle bug with MSVC 2015 which was also proposed by [Michael K.](https://github.com/Epidal).
+36. [Mário Feroldi](https://github.com/thelostt) fixed a small typo.
+37. [duncanwerner](https://github.com/duncanwerner) found a really embarrassing performance regression in the 2.0.0 release.
+38. [Damien](https://github.com/dtoma) fixed one of the last conversion warnings.
+39. [Thomas Braun](https://github.com/t-b) fixed a warning in a test case and adjusted MSVC calls in the CI.
+40. [Théo DELRIEU](https://github.com/theodelrieu) patiently and constructively oversaw the long way toward [iterator-range parsing](https://github.com/nlohmann/json/issues/290). He also implemented the magic behind the serialization/deserialization of user-defined types and split the single header file into smaller chunks.
+41. [Stefan](https://github.com/5tefan) fixed a minor issue in the documentation.
+42. [Vasil Dimov](https://github.com/vasild) fixed the documentation regarding conversions from `std::multiset`.
+43. [ChristophJud](https://github.com/ChristophJud) overworked the CMake files to ease project inclusion.
+44. [Vladimir Petrigo](https://github.com/vpetrigo) made a SFINAE hack more readable and added Visual Studio 17 to the build matrix.
+45. [Denis Andrejew](https://github.com/seeekr) fixed a grammar issue in the README file.
+46. [Pierre-Antoine Lacaze](https://github.com/palacaze) found a subtle bug in the `dump()` function.
+47. [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](https://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
+48. [cgzones](https://github.com/cgzones) had an idea how to fix the Coverity scan.
+49. [Jared Grubb](https://github.com/jaredgrubb) silenced a nasty documentation warning and supported the implementation of user-defined types.
+50. [Yixin Zhang](https://github.com/qwename) fixed an integer overflow check.
+51. [Bosswestfalen](https://github.com/Bosswestfalen) merged two iterator classes into a smaller one.
+52. [Daniel599](https://github.com/Daniel599) helped to get Travis to execute the tests with Clang's sanitizers and allowed to use more algorithms with the `items()` function.
+53. [Jonathan Lee](https://github.com/vjon) fixed an example in the README file.
+54. [gnzlbg](https://github.com/gnzlbg) supported the implementation of user-defined types.
+55. [Alexej Harm](https://github.com/qis) helped to get the user-defined types working with Visual Studio.
+56. [EnricoBilla](https://github.com/EnricoBilla) noted a typo in an example.
+57. [Martin Hořeňovský](https://github.com/horenmar) found a way for a 2x speedup for the compilation time of the test suite.
+58. [ukhegg](https://github.com/ukhegg) proposed an improvement for the examples section.
+59. [rswanson-ihi](https://github.com/rswanson-ihi) noted a typo in the README.
+60. [Mihai Stan](https://github.com/stanmihai4) fixed a bug in the comparison with `nullptr`s.
+61. [Tushar Maheshwari](https://github.com/tusharpm) added [cotire](https://github.com/sakra/cotire) support to speed up the compilation.
+62. [TedLyngmo](https://github.com/TedLyngmo) noted a typo in the README, removed unnecessary bit arithmetic, and fixed some `-Weffc++` warnings.
+63. [Krzysztof Woś](https://github.com/krzysztofwos) made exceptions more visible.
+64. [ftillier](https://github.com/ftillier) fixed a compiler warning.
+65. [tinloaf](https://github.com/tinloaf) made sure all pushed warnings are properly popped.
+66. [Fytch](https://github.com/Fytch) found a bug in the documentation.
+67. [Jay Sistar](https://github.com/Type1J) implemented a Meson build description.
+68. [Henry Lee](https://github.com/HenryRLee) fixed a warning in ICC and improved the iterator implementation.
+69. [Vincent Thiery](https://github.com/vthiery) maintains a package for the Conan package manager.
+70. [Steffen](https://github.com/koemeet) fixed a potential issue with MSVC and `std::min`.
+71. [Mike Tzou](https://github.com/Chocobo1) fixed some typos.
+72. [amrcode](https://github.com/amrcode) noted misleading documentation about comparison of floats.
+73. [Oleg Endo](https://github.com/olegendo) reduced the memory consumption by replacing `<iostream>` with `<iosfwd>`.
+74. [dan-42](https://github.com/dan-42) cleaned up the CMake files to simplify including/reusing of the library.
+75. [Nikita Ofitserov](https://github.com/himikof) allowed for moving values from initializer lists.
+76. [Greg Hurrell](https://github.com/wincent) fixed a typo.
+77. [Dmitry Kukovinets](https://github.com/DmitryKuk) fixed a typo.
+78. [kbthomp1](https://github.com/kbthomp1) fixed an issue related to the Intel OSX compiler.
+79. [Markus Werle](https://github.com/daixtrose) fixed a typo.
+80. [WebProdPP](https://github.com/WebProdPP) fixed a subtle error in a precondition check.
+81. [Alex](https://github.com/leha-bot) noted an error in a code sample.
+82. [Tom de Geus](https://github.com/tdegeus) reported some warnings with ICC and helped to fix them.
+83. [Perry Kundert](https://github.com/pjkundert) simplified reading from input streams.
+84. [Sonu Lohani](https://github.com/sonulohani) fixed a small compilation error, fixed the compilation with MSVC 2015 in debug mode and fixed a warning.
+85. [Jamie Seward](https://github.com/jseward) fixed all MSVC warnings and avoided unnecessary string copies in `find()` and `count()`.
+86. [Nate Vargas](https://github.com/eld00d) added a Doxygen tag file.
+87. [pvleuven](https://github.com/pvleuven) helped to fix a warning in ICC.
+88. [Pavel](https://github.com/crea7or) helped to fix some warnings in MSVC.
+89. [Mitja](https://github.com/Itja) fixed some typos.
+90. [Jorrit Wronski](https://github.com/jowr) updated the Hunter package links.
+91. [Matthias Möller](https://github.com/TinyTinni) added a `.natvis` for the MSVC debug view and removed the dependency from `std::stringstream`.
+92. [bogemic](https://github.com/bogemic) fixed some C++17 deprecation warnings.
+93. [Eren Okka](https://github.com/erengy) fixed some MSVC warnings.
+94. [abolz](https://github.com/abolz) integrated the Grisu2 algorithm for proper floating-point formatting, allowing more roundtrip checks to succeed.
+95. [Vadim Evard](https://github.com/Pipeliner) fixed a Markdown issue in the README.
+96. [zerodefect](https://github.com/zerodefect) fixed a compiler warning.
+97. [Kert](https://github.com/kaidokert) allowed to template the string type in the serialization and added the possibility to override the exceptional behavior.
+98. [mark-99](https://github.com/mark-99) helped fix an ICC error.
+99. [Patrik Huber](https://github.com/patrikhuber) fixed links in the README file.
+100. [johnfb](https://github.com/johnfb) found a bug in the implementation of CBOR's indefinite length strings.
+101. [Paul Fultz II](https://github.com/pfultz2) added a note on the cget package manager.
+102. [Wilson Lin](https://github.com/wla80) made the integration section of the README more concise.
+103. [RalfBielig](https://github.com/ralfbielig) detected and fixed a memory leak in the parser callback.
+104. [agrianius](https://github.com/agrianius) allowed dumping JSON to an alternative string type and added code to use alternative string implementations.
+105. [Kevin Tonon](https://github.com/ktonon) overworked the C++11 compiler checks in CMake.
+106. [Axel Huebl](https://github.com/ax3l) simplified a CMake check and added support for the [Spack package manager](https://spack.io).
+107. [Carlos O'Ryan](https://github.com/coryan) fixed a typo.
+108. [James Upjohn](https://github.com/jupjohn) fixed a version number in the compilers section.
+109. [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines and provided documentation for the CMake integration.
+110. [Jan Schöppach](https://github.com/dns13) fixed a typo.
+111. [martin-mfg](https://github.com/martin-mfg) fixed a typo.
+112. [Julius Rakow](https://github.com/juliusrakow) fixed the Meson include directory and fixed the links to [cppreference.com](https://cppreference.com).
+113. [grembo](https://github.com/grembo) fixed the test suite and re-enabled several test cases.
+114. [Hyeon Kim](https://github.com/simnalamburt) introduced the macro `JSON_INTERNAL_CATCH` to control the exception handling inside the library and fixed an issue with a double macro definition.
+115. [thyu](https://github.com/thyu) fixed a compiler warning.
+116. [David Guthrie](https://github.com/LEgregius) fixed a subtle compilation error with Clang 3.4.2.
+117. [Dennis Fischer](https://github.com/dennisfischer) allowed to call `find_package` without installing the library.
+118. [Ben Berman](https://github.com/rivertam) made some error messages more understandable.
+119. [zakalibit](https://github.com/zakalibit) fixed a compilation problem with the Intel C++ compiler.
+120. [mandreyel](https://github.com/mandreyel) fixed a compilation problem.
+121. [Kostiantyn Ponomarenko](https://github.com/koponomarenko) added version and license information to the Meson build file.
+122. [Henry Schreiner](https://github.com/henryiii) added support for GCC 4.8.
+123. [knilch](https://github.com/knilch0r) made sure the test suite does not stall when run in the wrong directory.
+124. [Antonio Borondo](https://github.com/antonioborondo) fixed an MSVC 2017 warning.
+125. [Dan Gendreau](https://github.com/dgendreau) implemented the `NLOHMANN_JSON_SERIALIZE_ENUM` macro to quickly define an enum/JSON mapping.
+126. [efp](https://github.com/efp) added line and column information to parse errors.
+127. [julian-becker](https://github.com/julian-becker) added BSON support.
+128. [Pratik Chowdhury](https://github.com/pratikpc) added support for structured bindings.
+129. [David Avedissian](https://github.com/davedissian) added support for Clang 5.0.1 (PS4 version).
+130. [Jonathan Dumaresq](https://github.com/dumarjo) implemented an input adapter to read from `FILE*`.
+131. [kjpus](https://github.com/kjpus) fixed a link in the documentation.
+132. [Manvendra Singh](https://github.com/manu-chroma) fixed a typo in the documentation.
+133. [ziggurat29](https://github.com/ziggurat29) fixed an MSVC warning.
+134. [Sylvain Corlay](https://github.com/SylvainCorlay) added code to avoid an issue with MSVC.
+135. [mefyl](https://github.com/mefyl) fixed a bug when JSON was parsed from an input stream.
+136. [Millian Poquet](https://github.com/mpoquet) allowed to install the library via Meson.
+137. [Michael Behrns-Miller](https://github.com/moodboom) found an issue with a missing namespace.
+138. [Nasztanovics Ferenc](https://github.com/naszta) fixed a compilation issue with libc 2.12.
+139. [Andreas Schwab](https://github.com/andreas-schwab) fixed the endian conversion.
+140. [Mark-Dunning](https://github.com/Mark-Dunning) fixed a warning in MSVC.
+141. [Gareth Sylvester-Bradley](https://github.com/garethsb-sony) added `operator/` for JSON Pointers and fixed a compilation issue with MSVC.
+142. [John-Mark](https://github.com/johnmarkwayve) noted a missing header.
+143. [Vitaly Zaitsev](https://github.com/xvitaly) fixed compilation with GCC 9.0.
+144. [Laurent Stacul](https://github.com/stac47) fixed compilation with GCC 9.0.
+145. [Ivor Wanders](https://github.com/iwanders) helped to reduce the CMake requirement to version 3.1 and fixed the examples to catch exception by `const&`.
+146. [njlr](https://github.com/njlr) updated the Buckaroo instructions.
+147. [Lion](https://github.com/lieff) fixed a compilation issue with GCC 7 on CentOS.
+148. [Isaac Nickaein](https://github.com/nickaein) improved the integer serialization performance and implemented the `contains()` function.
+149. [past-due](https://github.com/past-due) suppressed an unfixable warning.
+150. [Elvis Oric](https://github.com/elvisoric) improved Meson support.
+151. [Matěj Plch](https://github.com/Afforix) fixed an example in the README.
+152. [Mark Beckwith](https://github.com/wythe) fixed two typos.
+153. [scinart](https://github.com/scinart) fixed a bug in the serializer.
+154. [Patrick Boettcher](https://github.com/pboettch) implemented `push_back()` and `pop_back()` for JSON Pointers.
+155. [Bruno Oliveira](https://github.com/nicoddemus) added support for Conda.
+156. [Michele Caini](https://github.com/skypjack) fixed links in the README.
+157. [Hani](https://github.com/hnkb) documented how to install the library with NuGet.
+158. [yann-morin-1998](https://github.com/yann-morin-1998) helped to reduce the CMake requirement to version 3.1.
+159. [Konstantin Podsvirov](https://github.com/podsvirov) maintains a package for the MSYS2 software distro and fixed the MSYS2 package documentation.
+160. [remyabel](https://github.com/remyabel2) added GNUInstallDirs to the CMake files.
+161. [Taylor Howard](https://github.com/taylorhoward92) fixed a unit test.
+162. [Gabe Ron](https://github.com/Macr0Nerd) implemented the `to_string` method.
+163. [Watal M. Iwasaki](https://github.com/heavywatal) fixed a Clang warning.
+164. [Viktor Kirilov](https://github.com/onqtam) switched the unit tests from [Catch](https://github.com/philsquared/Catch) to [doctest](https://github.com/doctest/doctest)
+165. [Juncheng E](https://github.com/ejcjason) fixed a typo.
+166. [tete17](https://github.com/tete17) fixed a bug in the `contains` function.
+167. [Xav83](https://github.com/Xav83) fixed some cppcheck warnings.
+168. [0xflotus](https://github.com/0xflotus) fixed some typos.
+169. [Christian Deneke](https://github.com/chris0x44) added a const version of `json_pointer::back`.
+170. [Julien Hamaide](https://github.com/crazyjul) made the `items()` function work with custom string types.
+171. [Evan Nemerson](https://github.com/nemequ) updated fixed a bug in Hedley and updated this library accordingly.
+172. [Florian Pigorsch](https://github.com/flopp) fixed a lot of typos.
+173. [Camille Bégué](https://github.com/cbegue) fixed an issue in the conversion from  `std::pair` and `std::tuple` to `json`.
+174. [Anthony VH](https://github.com/AnthonyVH) fixed a compile error in an enum deserialization.
+175. [Yuriy Vountesmery](https://github.com/ua-code-dragon) noted a subtle bug in a preprocessor check.
+176. [Chen](https://github.com/dota17) fixed numerous issues in the library.
+177. [Antony Kellermann](https://github.com/aokellermann) added a CI step for GCC 10.1.
+178. [Alex](https://github.com/gistrec) fixed an MSVC warning.
+179. [Rainer](https://github.com/rvjr) proposed an improvement in the floating-point serialization in CBOR.
+180. [Francois Chabot](https://github.com/FrancoisChabot) made performance improvements in the input adapters.
+181. [Arthur Sonzogni](https://github.com/ArthurSonzogni) documented how the library can be included via `FetchContent`.
+182. [Rimas Misevičius](https://github.com/rmisev) fixed an error message.
+183. [Alexander Myasnikov](https://github.com/alexandermyasnikov) fixed some examples and a link in the README.
+184. [Hubert Chathi](https://github.com/uhoreg) made CMake's version config file architecture-independent.
+185. [OmnipotentEntity](https://github.com/OmnipotentEntity) implemented the binary values for CBOR, MessagePack, BSON, and UBJSON.
+186. [ArtemSarmini](https://github.com/ArtemSarmini) fixed a compilation issue with GCC 10 and fixed a leak.
+187. [Evgenii Sopov](https://github.com/sea5kg) integrated the library to the wsjcpp package manager.
+188. [Sergey Linev](https://github.com/linev) fixed a compiler warning.
+189. [Miguel Magalhães](https://github.com/magamig) fixed the year in the copyright.
+190. [Alexander “weej” Jones](https://github.com/alex-weej) fixed an example in the README.
+191. [Antoine Cœur](https://github.com/Coeur) fixed some typos in the documentation.
+192. [jothepro](https://github.com/jothepro) updated links to the Hunter package.
+193. [Dave Lee](https://github.com/kastiglione) fixed a link in the README.
+194. [Joël Lamotte](https://github.com/Klaim) added instruction for using Build2's package manager.
+195. [Paul Jurczak](https://github.com/pauljurczak) fixed an example in the README.
+196. [Carlos Gomes Martinho](https://github.com/gocarlos) updated the Conan package source.
+197. [Tridacnid](https://github.com/Tridacnid) improved the CMake tests.
+198. [Michael](https://github.com/MBalszun) fixed MSVC warnings.
+199. [Quentin Barbarat](https://github.com/quentin-dev) fixed an example in the documentation.
+200. [XyFreak](https://github.com/XyFreak) fixed a compiler warning.
+201. [TotalCaesar659](https://github.com/TotalCaesar659) fixed links in the README and updated the links in the documentation to use HTTPS.
+202. [Tanuj Garg](https://github.com/tanuj208) improved the fuzzer coverage for UBSAN input.
+203. [AODQ](https://github.com/AODQ) fixed a compiler warning.
+204. [jwittbrodt](https://github.com/jwittbrodt) made `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE` inline.
+205. [pfeatherstone](https://github.com/pfeatherstone) improved the upper bound of arguments of the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
+206. [Jan Procházka](https://github.com/jprochazk) fixed a bug in the CBOR parser for binary and string values.
+207. [T0b1-iOS](https://github.com/T0b1-iOS) fixed a bug in the new hash implementation.
+208. [Matthew Bauer](https://github.com/matthewbauer) adjusted the CBOR writer to create tags for binary subtypes.
+209. [gatopeich](https://github.com/gatopeich) implemented an ordered map container for `nlohmann::ordered_json`.
+210. [Érico Nogueira Rolim](https://github.com/ericonr) added support for pkg-config.
+211. [KonanM](https://github.com/KonanM) proposed an implementation for the `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE`/`NLOHMANN_DEFINE_TYPE_INTRUSIVE` macros.
+212. [Guillaume Racicot](https://github.com/gracicot) implemented `string_view` support and allowed C++20 support.
+213. [Alex Reinking](https://github.com/alexreinking) improved CMake support for `FetchContent`.
+214. [Hannes Domani](https://github.com/ssbssa) provided a GDB pretty printer.
+215. Lars Wirzenius reviewed the README file.
+216. [Jun Jie](https://github.com/ongjunjie) fixed a compiler path in the CMake scripts.
+217. [Ronak Buch](https://github.com/rbuch) fixed typos in the documentation.
+218. [Alexander Karzhenkov](https://github.com/karzhenkov) fixed a move constructor and the Travis builds.
+219. [Leonardo Lima](https://github.com/leozz37) added CPM.Cmake support.
+220. [Joseph Blackman](https://github.com/jbzdarkid) fixed a warning.
+221. [Yaroslav](https://github.com/YarikTH) updated doctest and implemented unit tests.
+222. [Martin Stump](https://github.com/globberwops) fixed a bug in the CMake files.
+223. [Jaakko Moisio](https://github.com/jasujm) fixed a bug in the input adapters.
+224. [bl-ue](https://github.com/bl-ue) fixed some Markdown issues in the README file.
+225. [William A. Wieselquist](https://github.com/wawiesel) fixed an example from the README.
+226. [abbaswasim](https://github.com/abbaswasim) fixed an example from the README.
+227. [Remy Jette](https://github.com/remyjette) fixed a warning.
+228. [Fraser](https://github.com/frasermarlow) fixed the documentation.
+229. [Ben Beasley](https://github.com/musicinmybrain) updated doctest.
+230. [Doron Behar](https://github.com/doronbehar) fixed pkg-config.pc.
+231. [raduteo](https://github.com/raduteo) fixed a warning.
+232. [David Pfahler](https://github.com/theShmoo) added the possibility to compile the library without I/O support.
+233. [Morten Fyhn Amundsen](https://github.com/mortenfyhn) fixed a typo.
+234. [jpl-mac](https://github.com/jpl-mac) allowed treating the library as a system header in CMake.
+235. [Jason Dsouza](https://github.com/jasmcaus) fixed the indentation of the CMake file.
+236. [offa](https://github.com/offa) added a link to Conan Center to the documentation.
+237. [Rafail Giavrimis](https://github.com/grafail) fixed the Google Benchmark default branch.
+238. [Louis Dionne](https://github.com/ldionne) fixed a conversion operator.
+239. [justanotheranonymoususer](https://github.com/justanotheranonymoususer) made the examples in the README more consistent.
+240. [Finkman](https://github.com/Finkman) suppressed some `-Wfloat-equal` warnings and fixed the debug pretty-printer.
+241. [Ferry Huberts](https://github.com/fhuberts) fixed `-Wswitch-enum` warnings and fixed a typo.
+242. [Arseniy Terekhin](https://github.com/senyai) made the GDB pretty-printer robust against unset variable names.
+243. [Amir Masoud Abdol](https://github.com/amirmasoudabdol) updated the Homebrew command as nlohmann/json is now in homebrew-core.
+244. [Hallot](https://github.com/Hallot) fixed some `-Wextra-semi-stmt warnings`.
+245. [Giovanni Cerretani](https://github.com/gcerretani) fixed `-Wunused` warnings on `JSON_DIAGNOSTICS` and fixed a check for `std::filesystem`.
+246. [Bogdan Popescu](https://github.com/Kapeli) hosts the [docset](https://github.com/Kapeli/Dash-User-Contributions/tree/master/docsets/JSON_for_Modern_C%2B%2B) for offline documentation viewers.
+247. [Carl Smedstad](https://github.com/carlsmedstad) fixed an assertion error when using `JSON_DIAGNOSTICS`.
+248. [miikka75](https://github.com/miikka75) provided an important fix to compile C++17 code with Clang 9.
+249. [Maarten Becker](https://github.com/kernie) fixed a warning for shadowed variables.
+250. [Cristi Vîjdea](https://github.com/axnsan12) fixed typos in the `operator[]` documentation.
+251. [Alex Beregszaszi](https://github.com/axic) fixed spelling mistakes in comments.
+252. [Dirk Stolle](https://github.com/striezel) fixed typos in the documentation.
+253. [Daniel Albuschat](https://github.com/daniel-kun) corrected the parameter name in the `parse` documentation.
+254. [Prince Mendiratta](https://github.com/Prince-Mendiratta) fixed a link to the FAQ.
+255. [Florian Albrechtskirchinger](https://github.com/falbrechtskirchinger) implemented `std::string_view` support for object keys and made dozens of other improvements.
+256. [Qianqian Fang](https://github.com/fangq) implemented the Binary JData (BJData) format.
+257. [pketelsen](https://github.com/pketelsen) added macros `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` and `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT`.
+258. [DarkZeros](https://github.com/DarkZeros) adjusted to code to not clash with Arduino defines.
+259. [flagarde](https://github.com/flagarde) fixed the output of `meta()` for MSVC.
+260. [Dimitris Apostolou](https://github.com/rex4539) fixed a typo.
+261. [Michael Nosthoff](https://github.com/heinemml) fixed a typo.
+262. [JungHoon Lee](https://github.com/jhnlee) fixed a typo.
+263. [Faruk D.](https://github.com/fdiblen) fixed the CITATION.CFF file.
+264. [Andrea Cocito](https://github.com/puffetto) added a clarification on macro usage to the documentation.
+265. [Krzysiek Karbowiak](https://github.com/kkarbowiak) refactored the tests to use `CHECK_THROWS_WITH_AS`.
+266. [Chaoqi Zhang](https://github.com/prncoprs) fixed a typo.
+267. [ivanovmp](https://github.com/ivanovmp) fixed a whitespace error.
+268. [KsaNL](https://github.com/KsaNL) fixed a build error when including `<windows.h>`.
+269. [Andrea Pappacoda](https://github.com/Tachi107) moved `.pc` and `.cmake` files to `share` directory.
+270. [Wolf Vollprecht](https://github.com/wolfv) added the `patch_inplace` function.
+271. [Jake Zimmerman](https://github.com/jez) highlighted common usage patterns in the README file.
+272. [NN](https://github.com/NN---) added the Visual Studio output directory to `.gitignore`.
+273. [Romain Reignier](https://github.com/romainreignier) improved the performance of the vector output adapter.
+274. [Mike](https://github.com/Mike-Leo-Smith) fixed the `std::iterator_traits`.
+275. [Richard Hozák](https://github.com/richardhozak) added macro `JSON_NO_ENUM` to disable default enum conversions.
+276. [vakokako](https://github.com/vakokako) fixed tests when compiling with C++20.
+277. [Alexander “weej” Jones](https://github.com/alexweej) fixed an example in the README.
+278. [Eli Schwartz](https://github.com/eli-schwartz) added more files to the `include.zip` archive.
+279. [Kevin Lu](https://github.com/kevinlul) fixed a compilation issue when typedefs with certain names were present.
+280. [Trevor Hickey](https://github.com/luxe) improved the description of an example.
+281. [Jef LeCompte](https://github.com/jef) updated the year in the README file.
+282. [Alexandre Hamez](https://github.com/ahamez) fixed a warning.
+283. [Maninderpal Badhan](https://github.com/mbadhan) fixed a typo.
+284. [kevin--](https://github.com/kevin--) added a note to an example in the README file.
+285. [I](https://github.com/wx257osn2) fixed a typo.
+286. [Gregorio Litenstein](https://github.com/Lord-Kamina) fixed the Clang detection.
+287. [Andreas Smas](https://github.com/andoma) added a Doozer badge.
+288. [WanCW](https://github.com/wancw) fixed the string conversion with Clang.
+289. [zhaohuaxishi](https://github.com/zhaohuaxishi) fixed a Doxygen error.
+290. [emvivre](https://github.com/emvivre) removed an invalid parameter from CMake.
+291. [Tobias Hermann](https://github.com/Dobiasd) fixed a link in the README file.
+292. [Michael](https://github.com/traits) fixed a warning.
+293. [Ryan Mulder](https://github.com/ryanjmulder) added `ensure_ascii` to the `dump` function.
+294. [Muri Nicanor](https://github.com/murinicanor) fixed the `sed` discovery in the Makefile.
+295. [David Avedissian](https://github.com/dgavedissian) implemented SFINAE-friendly `iterator_traits`.
+296. [AQNOUCH Mohammed](https://github.com/aqnouch) fixed a typo in the README.
+297. [Gareth Sylvester-Bradley](https://github.com/garethsb) added `operator/=` and `operator/` to construct JSON pointers.
+298. [Michael Macnair](https://github.com/mykter) added support for afl-fuzz testing.
+299. [Berkus Decker](https://github.com/berkus) fixed a typo in the README.
+300. [Illia Polishchuk](https://github.com/ilqvya) improved the CMake testing.
+301. [Ikko Ashimine](https://github.com/eltociear) fixed two typos.
+302. [Raphael Grimm](https://github.com/barcode) added the possibility to define a custom base class.
+303. [tocic](https://github.com/tocic) fixed typos in the documentation.
+304. [Vertexwahn](https://github.com/Vertexwahn) added Bazel build support.
+305. [DavidKorczynski](https://github.com/DavidKorczynski) added a CIFuzz CI GitHub action.
+306. [Florian Segginger](https://github.com/floriansegginger) bumped the years in the README.
+307. [haadfida](https://github.com/haadfida) cleaned up the badges of used services.
+308. [Arsen Arsenović](https://github.com/ArsenArsen) fixed a build error.
+309. [theevilone45](https://github.com/theevilone45) fixed a typo in a CMake file.
+310. [Sergei Trofimovich](https://github.com/trofi) fixed the custom allocator support.
+311. [Joyce](https://github.com/joycebrum) fixed some security issues in the GitHub workflows.
+312. [Nicolas Jakob](https://github.com/njakob) add vcpkg version badge.
+313. [Tomerkm](https://github.com/Tomerkm) added tests.
+314. [No.](https://github.com/tusooa) fixed the use of `get<>` calls.
+315. [taro](https://github.com/tarolling) fixed a typo in the `CODEOWNERS` file.
+316. [Felix Yan](https://github.com/felixonmars) fixed a typo in the README.
+317. [HO-COOH](https://github.com/HO-COOH) fixed a parenthesis in the documentation.
+318. [miny1233](https://github.com/miny1233) fixed a parenthesis in the documentation.
+319. [tomalakgeretkal](https://github.com/tomalakgeretkal) fixed a compilation error.
+320. [alferov](https://github.com/ALF-ONE) fixed a compilation error and fixed a version in the documentation.
+321. [Craig Scott](https://github.com/craigscott-crascit) fixed a deprecation warning in CMake.
+322. [Vyacheslav Zhdanovskiy](https://github.com/ZeronSix) added macros for serialization-only types.
+323. [Mathieu Westphal](https://github.com/mwestphal) fixed typos.
+324. [scribam](https://github.com/scribam) fixed the MinGW workflow.
+325. [Aleksei Sapitskii](https://github.com/aleksproger) added support for Apple's Swift Package Manager.
+326. [Benjamin Buch](https://github.com/bebuch) fixed the installation path in CMake.
+327. [Colby Haskell](https://github.com/colbychaskell) clarified the parse error message in case a file cannot be opened.
+328. [Juan Carlos Arevalo Baeza](https://github.com/TheJCAB) fixed the enum conversion.
+329. [ss](https://github.com/serge-s) fixed the amalgamation call.
+330. [AniketDhemare](https://github.com/AniketDhemare) fixed a version in the documentation.
+331. [Philip Müller](https://github.com/philip-paul-mueller) fixed an example.
+332. [Leila Shcheglova](https://github.com/LeilaShcheglova) fixed a warning in a test.
+333. [Alex Prabhat Bara](https://github.com/alexprabhat99) fixed a function name in the documentation.
+334. [laterlaugh](https://github.com/laterlaugh) fixed some typos.
+335. [Yuanhao Jia](https://github.com/MrJia1997) fixed the GDB pretty printer.
+336. [Fallen_Breath](https://github.com/Fallen-Breath) fixed an example for JSON Pointer.
+337. [Nikhil Idiculla](https://github.com/tsnl) fixed some typos.
+338. [Griffin Myers](https://github.com/gmyers18) updated the Natvis file.
+339. [thetimr](https://github.com/thetimr) fixed a typo in the documentation.
+340. [Balazs Erseki](https://github.com/zerocukor287) fixed a URL in the contribution guidelines.
+341. [Niccolò Iardella](https://github.com/rotolof) added `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
+342. [Borislav Stanimirov](https://github.com/iboB) allowed overriding the CMake target name.
+343. [Captain Crutches](https://github.com/captaincrutches) made `iterator_proxy_value` a `std::forward_iterator`.
+344. [Fredrik Sandhei](https://github.com/fsandhei) added type conversion support for `std::optional`.
+345. [jh96](https://github.com/jordan-hoang) added exceptions when `nullptr` is passed to `parse`.
+346. [Stuart Gorman](https://github.com/StuartGorman) fixed number parsing when `EINTR` set in `errno`.
+347. [Dylan Baker](https://github.com/dcbaker) generated a pkg-config file that follows the pkg-config conventions.
+348. [Tianyi Chen](https://github.com/TianyiChen) optimized the binary `get_number` implementation.
+349. [peng-wang-cn](https://github.com/peng-wang-cn) added type conversion support for multidimensional arrays.
+350. [Einars Netlis-Galejs](https://github.com/EinarsNG) added `ONLY_SERIALIZE` for `NLOHMANN_DEFINE_DERIVED_TYPE_*` macros.
+351. [Marcel](https://github.com/mering) removed `alwayslink=True` Bazel flag.
+352. [Harinath Nampally](https://github.com/hnampally) added diagnostic positions to exceptions.
+353. [Nissim Armand Ben Danan](https://github.com/NissimBendanan) fixed `NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT` with an empty JSON instance.
+354. [Michael Valladolid](https://github.com/codenut) added support for BSON uint64 serialization/deserialization.
+355. [Nikhil](https://github.com/nikhilreddydev) updated the documentation.
+356. [Nebojša Cvetković](https://github.com/nebkat) added support for BJDATA optimized binary array type.
+357. [Sushrut Shringarputale](https://github.com/sushshring) added support for diagnostic positions. 
+358. [kimci86](https://github.com/kimci86) templated to `NLOHMANN_DEFINE_TYPE` macros to also support `ordered_json`.
+359. [Richard Topchii](https://github.com/richardtop) added support for VisionOS in the Swift Package Manager.
+360. [Robert Chisholm](https://github.com/Robadob) fixed a typo.
+361. [zjyhjqs](https://github.com/zjyhjqs) added CPack support.
+362. [bitFiedler](https://github.com/bitFiedler) made GDB pretty printer work with Python 3.8.
+363. [Gianfranco Costamagna](https://github.com/LocutusOfBorg) fixed a compiler warning.
+364. [risa2000](https://github.com/risa2000) made `std::filesystem::path` conversion to/from UTF-8 encoded string explicit.
+365. [AM](https://github.com/maqnouch) fixed typos in the README.
+366. [dmenendez-gruposantander](https://github.com/dmenendez-gruposantander) fixed typos in the comments of the examples.
+367. [Mihai Stan](https://github.com/mstan-xx) fixed comparisons against the literal `0`.
+368. [Matt Gumbel](https://github.com/intelmatt) fixed some `-Weffc++` warnings.
+369. [vimpunk](https://github.com/vimpunk) moved a lambda out of an unevaluated context to support older compilers.
+370. [Chris Harris](https://github.com/cjh1) fixed the compilation with GCC 4.8.
+371. [Palmer Dabbelt](https://github.com/palmer-dabbelt) generated and installed a pkg-config file.
+372. [Gus Pozuelo](https://github.com/ap-viavi) made `ordered_map` compatible with GCC 5.5, Clang 3.6, and Xcode 9.
+373. [AK](https://github.com/Lioncky) fixed an MSVC build error caused by the `min`/`max` macros from `windows.h`.
+374. [Sergiu Deitsch](https://github.com/sergiud) provided a fallback for missing `char8_t` support.
+375. [Xiaochuan Ye](https://github.com/XueSongTap) fixed `from_msgpack` for `std::byte` input by specializing `std::char_traits`.
+376. [Ville Vesilehto](https://github.com/thevilledev) fixed an overflow in the BJData size calculation and rejected overflowing negative integers in CBOR.
+377. [NmPassTHFan](https://github.com/nmpassthf) replaced the deprecated `std::is_trivial` for C++26.
+378. [Chris Ever](https://github.com/chirsz-ever) added the `ignore_trailing_commas` parser option.
+379. [Kuan-Fu Wu](https://github.com/kfwu1999) fixed the example code for `json_pointer` initialization.
+380. [David Kilzer](https://github.com/ddkilzer) added a missing header to the input adapters.
+381. [Miko](https://github.com/mikomikotaishi) added proper C++20 module support, simplified the module API, and fixed missing exports.
+382. [hitgirl](https://github.com/hitgil) fixed the CMake configuration when cross-compiling.
+383. [Devon Thomas](https://github.com/ThomaDevOSU) mentioned the Artistic Style formatting in the contribution guidelines.
+384. [Erik Hu](https://github.com/Erikhu1) made Coveralls upload errors non-fatal in the CI.
+385. [co63oc](https://github.com/co63oc) fixed typos.
+386. [DmitriBogdanov](https://github.com/DmitriBogdanov) fixed broken package manager links in the documentation.
+387. [Bander](https://github.com/banderzhm) improved the MSVC compatibility of the C++ modules.
+388. [Andy Choi](https://github.com/ccpong) removed an unnecessary `template` keyword before `get` in the README and the documentation.
+389. [SamareshSingh](https://github.com/ssam18) fixed single-element brace initialization to copy/move instead of wrapping in an array, fixed the `WITH_DEFAULT` macros for `ordered_map`, and handled moved events in `serve_header.py`.
+390. [Aditya](https://github.com/Lumowhisp) improved the documentation of the documentation generation.
+391. [cheese1](https://github.com/cheese1) clarified the README.
+392. [KhloodElhossiny](https://github.com/khloodelhossiny) enabled `std::string_view` keys in `operator[]`.
+393. [Charles Cabergs](https://github.com/cacharle) fixed a `-Wtautological-constant-out-of-range-compare` warning.
+394. [EALePain](https://github.com/EALePain) made the `std::tuple` conversion work with reference types such as `std::tie`.
+395. [koala_oishi](https://github.com/chibi-dogs) fixed grammatical wording in the README.
+396. [riccardoori11](https://github.com/riccardoori11) fixed a typo in the documentation.
+397. [Swastik Bose](https://github.com/VasuBhakt) fixed the parent pointers after `update()` with `JSON_DIAGNOSTICS` and fixed the Doxygen autolinking of requirements.
+398. [trdesilva](https://github.com/trdesilva) added `front`, `pop_front`, and `push_front` to `json_pointer`.
+399. [Akhilesh Arora](https://github.com/akhilesharora) fixed an incomplete-type error with `ordered_json`.
+400. [Hariom Phulre](https://github.com/hariomphulre) fixed the C++20 modules compilation with GCC.
+401. [Kirill Lokotkov](https://github.com/RUSLoker) fixed printing `long double` values.
+402. [George Sedov](https://github.com/radistmorse) added the `NLOHMANN_DEFINE_TYPE_*_WITH_NAMES` macros.
+403. [Caillin Nugent](https://github.com/nugentcaillin) added the `NLOHMANN_JSON_SERIALIZE_ENUM_STRICT` macro.
+404. [Cosmin D.](https://github.com/drcosmin) fixed `std::filesystem::path` conversions and added an MSVC workaround for `std::unique_ptr`.
+405. [Paul Dreik](https://github.com/pauldreik) fixed a test relying on implementation-specific behavior.
+406. [Daniel Falk](https://github.com/daniel-falk) added missing copyright notices to the SBOM.
+407. [Federico Sfriso](https://github.com/federicosfriso05-dotcom) added support for constructing JSON values from C++20 range views.
+408. [Luke Banicevic](https://github.com/banaboi) fixed corrupt BSON output for lengths exceeding `INT32_MAX`, cleaned up the BSON writer, and improved the documentation.
+409. [Patrick Armstrong](https://github.com/Patrick10199) updated the CBOR references and the half-precision float assertions.
+410. [Yash Bavadiya](https://github.com/xevrion) added checks to all BSON reads.
+411. [hum4nBeing](https://github.com/hum4nBeing) fixed the overflow handling of high-precision numbers in UBJSON.
+412. [tomatotomata](https://github.com/tomatotomata) added checks for reading CBOR tagged subtypes.
+413. [YingqiDuan](https://github.com/YingqiDuan) documented the BSON interoperability.
+414. [KBS](https://github.com/youdie006) documented the standards compliance and the strictness of `parse()` and `operator>>`.
+415. [Petr Bělohlávek](https://github.com/petrbel) added Clang 21 and 22 to the CI.
+416. [Dmitry Rantovov](https://github.com/darkdi) fixed the placement of a CBOR documentation block.
+417. [ljcjclljc](https://github.com/ljcjclljc) fixed the comparison of large unsigned integers with signed integers.
+418. [Sahil Kamate](https://github.com/sahilkamate03) fixed the handling of CBOR tags 0-5 and 21-23.
+419. [Krishnanand G](https://github.com/Krishnanand-G) made the UBJSON writer reject `use_type` without `use_size`.
+420. [whn](https://github.com/Whning0513) documented the lenient BSON input handling and corrected the complexity of `to_bson`.
+421. [elix3r](https://github.com/22elix3r) fixed `update()` with `merge_objects` when merging a primitive into an object.
+422. [Avionic Harshit](https://github.com/avionicharshit-byte) made `diff()` linear when an array shrinks.
+423. [Qatadaha Bin Matloob](https://github.com/qatcod) fixed comparisons between integers and floats and fixed unparsable BJData output.
+424. [Wu Shuwen](https://github.com/dajiaohuang) removed an unused include.

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

@@ -1879,21 +1860,28 @@ The library itself consists of a single header file licensed under the MIT licen
 - [**AppVeyor**](https://www.appveyor.com) for [continuous integration](https://ci.appveyor.com/project/nlohmann/json) on Windows
 - [**Artistic Style**](https://astyle.sourceforge.net) for automatic source code indentation
 - [**Clang**](https://clang.llvm.org) for compilation with code sanitizers
+- [**Clang-Tidy**](https://clang.llvm.org/extra/clang-tidy/) for static analysis and style checks
 - [**CMake**](https://cmake.org) for build automation
 - [**Codacy**](https://www.codacy.com) for further [code analysis](https://app.codacy.com/gh/nlohmann/json/dashboard)
+- [**CodeQL**](https://codeql.github.com) for code scanning
 - [**Coveralls**](https://coveralls.io) to measure [code coverage](https://coveralls.io/github/nlohmann/json)
 - [**Coverity Scan**](https://scan.coverity.com) for [static analysis](https://scan.coverity.com/projects/nlohmann-json)
 - [**cppcheck**](https://cppcheck.sourceforge.io) for static analysis
- [**doctest**](https://github.com/onqtam/doctest) for the unit tests
- [**GitHub Changelog Generator**](https://github.com/skywinder/github-changelog-generator) to generate the [ChangeLog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
+- [**cpplint**](https://github.com/cpplint/cpplint) for style checks
+- [**doctest**](https://github.com/doctest/doctest) for the unit tests
+- [**Flawfinder**](https://dwheeler.com/flawfinder/) for static analysis
+- [**GitHub Changelog Generator**](https://github.com/github-changelog-generator/github-changelog-generator) to generate the [ChangeLog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
 - [**Google Benchmark**](https://github.com/google/benchmark) to implement the benchmarks
 - [**Hedley**](https://nemequ.github.io/hedley/) to avoid re-inventing several compiler-agnostic feature macros
+- [**include-what-you-use**](https://include-what-you-use.org) to check the included headers
+- [**Infer**](https://fbinfer.com) for static analysis
 - [**lcov**](https://github.com/linux-test-project/lcov) to process coverage information and create an HTML view
 - [**libFuzzer**](https://llvm.org/docs/LibFuzzer.html) to implement fuzz testing for OSS-Fuzz
 - [**Material for MkDocs**](https://squidfunk.github.io/mkdocs-material/) for the style of the documentation site
 - [**MkDocs**](https://www.mkdocs.org) for the documentation site
 - [**OSS-Fuzz**](https://github.com/google/oss-fuzz) for continuous fuzz testing of the library ([project repository](https://github.com/google/oss-fuzz/tree/master/projects/json))
 - [**Probot**](https://probot.github.io) for automating maintainer tasks such as closing stale issues, requesting missing information, or detecting toxic comments.
+- [**Semgrep**](https://semgrep.dev) for static analysis
 - [**Valgrind**](https://valgrind.org) to check for correct memory management

 ## Notes
@@ -1987,10 +1975,10 @@ If the testdata is not found, several test suites will fail like this:

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

-json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::check_testsuite_downloaded() ) is NOT correct!
+json/tests/src/make_test_data_available.hpp:28: FATAL ERROR: REQUIRE( utils::check_testsuite_downloaded() ) is NOT correct!
  values: REQUIRE( false )
  logged: Test data not found in 'json/cmake-build-debug/json_test_data'.
          Please execute target 'download_test_data' before running this test suite.
@@ -2001,10 +1989,10 @@ json/tests/src/make_test_data_available.hpp:23: FATAL ERROR: REQUIRE( utils::che

 In case you have downloaded the library rather than checked out the code via Git, test `cmake_fetch_content_configure` will fail. Please execute `ctest -LE git_required` to skip these tests. See [issue #2189](https://github.com/nlohmann/json/issues/2189) for more information.

-Some tests are requiring network to be properly execute. They are labeled as `git_required`. Please execute `ctest -LE git_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.
+Some tests require network access to execute properly. They are labeled as `git_required`. Please execute `ctest -LE git_required` to skip these tests. See [issue #4851](https://github.com/nlohmann/json/issues/4851) for more information.

 Some tests change the installed files and hence make the whole process not reproducible. Please execute `ctest -LE not_reproducible` to skip these tests. See [issue #2324](https://github.com/nlohmann/json/issues/2324) for more information. Furthermore, assertions must be switched off to ensure reproducible builds (see [discussion 4494](https://github.com/nlohmann/json/discussions/4494)).

-Note you need to call `cmake -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.
+Note you need to call `ctest -LE "not_reproducible|git_required"` to exclude both labels. See [issue #2596](https://github.com/nlohmann/json/issues/2596) for more information.

 As Intel compilers use unsafe floating point optimization by default, the unit tests may fail. Use flag [`/fp:precise`](https://www.intel.com/content/www/us/en/docs/cpp-compiler/developer-guide-reference/2021-8/fp-model-fp.html) then.
@@ -10,10 +10,10 @@ SPDX-FileCopyrightText = "2013-2026 Niels Lohmann <https://nlohmann.me>"
 SPDX-License-Identifier = "MIT"

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

 [[annotations]]
 path = "include/nlohmann/detail/meta/cpp_future.hpp"
@@ -50,3 +50,9 @@ path = "tools/gdb_pretty_printer/**"
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2020 Hannes Domani <https://github.com/ssbssa>"
 SPDX-License-Identifier = "MIT"
+
+[[annotations]]
+path = "docs/docset/icon*.png"
+precedence = "override"
+SPDX-FileCopyrightText = "JSON logo (public domain), https://commons.wikimedia.org/wiki/File:JSON_vector_logo.svg"
+SPDX-License-Identifier = "CC0-1.0"
@@ -5,15 +5,14 @@ set(N 10)
 # Needed tools.
 ###############################################################################

-include(FindPython3)
 find_package(Python3 COMPONENTS Interpreter)

-find_program(CLANG_TOOL NAMES clang++-HEAD clang++ clang++-22 clang++-21 clang++-20 clang++-19 clang++-18 clang++-17 clang++-16 clang++-15 clang++-14 clang++-13 clang++-12 clang++-11 clang++)
+find_program(CLANG_TOOL NAMES clang++ clang++-HEAD clang++-22 clang++-21 clang++-20 clang++-19 clang++-18 clang++-17 clang++-16 clang++-15 clang++-14 clang++-13 clang++-12 clang++-11)
 execute_process(COMMAND ${CLANG_TOOL} --version OUTPUT_VARIABLE CLANG_TOOL_VERSION ERROR_VARIABLE CLANG_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TOOL_VERSION "${CLANG_TOOL_VERSION}")
 message(STATUS "🔖 Clang ${CLANG_TOOL_VERSION} (${CLANG_TOOL})")

-find_program(CLANG_TIDY_TOOL NAMES clang-tidy-22 clang-tidy-21 clang-tidy-20 clang-tidy-19 clang-tidy-18 clang-tidy-17 clang-tidy-16 clang-tidy-15 clang-tidy-14 clang-tidy-13 clang-tidy-12 clang-tidy-11 clang-tidy)
+find_program(CLANG_TIDY_TOOL NAMES clang-tidy clang-tidy-22 clang-tidy-21 clang-tidy-20 clang-tidy-19 clang-tidy-18 clang-tidy-17 clang-tidy-16 clang-tidy-15 clang-tidy-14 clang-tidy-13 clang-tidy-12 clang-tidy-11)
 execute_process(COMMAND ${CLANG_TIDY_TOOL} --version OUTPUT_VARIABLE CLANG_TIDY_TOOL_VERSION ERROR_VARIABLE CLANG_TIDY_TOOL_VERSION)
 string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" CLANG_TIDY_TOOL_VERSION "${CLANG_TIDY_TOOL_VERSION}")
 message(STATUS "🔖 Clang-Tidy ${CLANG_TIDY_TOOL_VERSION} (${CLANG_TIDY_TOOL})")
@@ -69,9 +68,7 @@ string(REGEX MATCH "[0-9]+(\\.[0-9]+)+" VALGRIND_TOOL_VERSION "${VALGRIND_TOOL_V
 message(STATUS "🔖 Valgrind ${VALGRIND_TOOL_VERSION} (${VALGRIND_TOOL})")

 find_program(GENHTML_TOOL NAMES genhtml)
-find_program(PLOG_CONVERTER_TOOL NAMES plog-converter)
-find_program(PVS_STUDIO_ANALYZER_TOOL NAMES pvs-studio-analyzer)
-find_program(SCAN_BUILD_TOOL NAMES scan-build-15 scan-build-14 scan-build-13 scan-build-12 scan-build-11 scan-build)
+find_program(SCAN_BUILD_TOOL NAMES scan-build scan-build-22 scan-build-21 scan-build-20 scan-build-19 scan-build-18 scan-build-17 scan-build-16 scan-build-15 scan-build-14 scan-build-13 scan-build-12 scan-build-11)

 # the individual source files
 file(GLOB_RECURSE SRC_FILES ${PROJECT_SOURCE_DIR}/include/nlohmann/*.hpp)
@@ -367,7 +364,7 @@ add_custom_target(ci_test_coverage
    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused
    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused
    COMMAND ${CMAKE_SOURCE_DIR}/tests/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
-    COMMAND genhtml --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage json.info.filtered.noexcept
+    COMMAND ${GENHTML_TOOL} --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage json.info.filtered.noexcept

    COMMENT "Compile and test with coverage"
 )
@@ -392,8 +389,8 @@ add_custom_target(ci_test_clang_sanitizer
 # Check if header is amalgamated and sources are properly indented.
 ###############################################################################

-# Same file set as .github/workflows/check_amalgamation.yml, so a direct push to develop/master/release/*
-# (which only this CMake target checks, not the pull_request-only workflow) is held to the same standard.
+# Same file set as .github/workflows/check_amalgamation.yml, so this CMake target (which can be run locally) is held
+# to the same standard as the workflow (which runs for pull requests and for pushes to develop/master/release/*).
 file(GLOB_RECURSE INDENT_FILES
    ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.hpp
    ${PROJECT_SOURCE_DIR}/docs/mkdocs/docs/examples/*.cpp
@@ -410,10 +407,11 @@ list(FILTER INDENT_FILES EXCLUDE REGEX "/tests/thirdparty/|/tests/abi/include/nl
 set(include_dir ${PROJECT_SOURCE_DIR}/single_include/nlohmann)
 set(tool_dir ${PROJECT_SOURCE_DIR}/tools/amalgamate)
 add_custom_target(ci_test_amalgamation
-    COMMAND rm -fr ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~ ${include_dir}/json_literals.hpp~
+    COMMAND rm -fr ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~ ${include_dir}/json_literals.hpp~ ${include_dir}/json_view.hpp~
    COMMAND cp ${include_dir}/json.hpp ${include_dir}/json.hpp~
    COMMAND cp ${include_dir}/json_fwd.hpp ${include_dir}/json_fwd.hpp~
    COMMAND cp ${include_dir}/json_literals.hpp ${include_dir}/json_literals.hpp~
+    COMMAND cp ${include_dir}/json_view.hpp ${include_dir}/json_view.hpp~
    COMMAND cp ${PROJECT_SOURCE_DIR}/BUILD.bazel ${PROJECT_SOURCE_DIR}/BUILD.bazel~

    COMMAND ${Python3_EXECUTABLE} -mvenv venv_astyle
@@ -423,17 +421,21 @@ add_custom_target(ci_test_amalgamation
    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json.json -s .
    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_fwd.json -s .
    COMMAND cp ${PROJECT_SOURCE_DIR}/include/nlohmann/json_literals.hpp ${include_dir}/json_literals.hpp
-    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp
+    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_view.json -s .
+    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 ${include_dir}/json_view.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
    COMMAND diff ${include_dir}/json_fwd.hpp~ ${include_dir}/json_fwd.hpp
    COMMAND diff ${include_dir}/json_literals.hpp~ ${include_dir}/json_literals.hpp
+    COMMAND diff ${include_dir}/json_view.hpp~ ${include_dir}/json_view.hpp
    COMMAND diff ${PROJECT_SOURCE_DIR}/BUILD.bazel~ ${PROJECT_SOURCE_DIR}/BUILD.bazel

    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~ ${include_dir}/json_view.hpp~ ${PROJECT_SOURCE_DIR}/BUILD.bazel~
+
    WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
    COMMENT "Check amalgamation, formatting, and BUILD.bazel"
 )
@@ -719,7 +721,7 @@ ci_get_cmake(4.0.0  CMAKE_4_0_0_BINARY)

 # the tests require CMake 3.13 or later, so they are excluded for CMake 3.5.0
 set(JSON_CMAKE_FLAGS_3_5_0 JSON_Diagnostics JSON_Diagnostic_Positions JSON_GlobalUDLs JSON_ImplicitConversions JSON_DisableEnumSerialization
-    JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
+    JSON_DisableTupleReferenceConversion JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
    JSON_StrictNulHandling JSON_StrictBinaryUTF8 JSON_DeleteDeprecatedFunctions)
 set(JSON_CMAKE_FLAGS_3_31_6 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})
 set(JSON_CMAKE_FLAGS_4_0_0 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})
@@ -776,17 +778,14 @@ add_custom_target(ci_cmake_flags
 # Use more installed compilers.
 ###############################################################################

-foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6 g++-7 g++-8 g++-9 g++-10 g++-11 clang++-3.5 clang++-3.6 clang++-3.7 clang++-3.8 clang++-3.9 clang++-4.0 clang++-5.0 clang++-6.0 clang++-7 clang++-8 clang++-9 clang++-10 clang++-11 clang++-12 clang++-13 clang++-14 clang++-15 clang++-16 clang++-17 clang++-18 clang++-19 clang++-20)
+foreach(COMPILER g++-4.8 g++-4.9 g++-5 g++-6)
    find_program(COMPILER_TOOL NAMES ${COMPILER})
    if (COMPILER_TOOL)
-        unset(ADDITIONAL_FLAGS)
-
        add_custom_target(ci_test_compiler_${COMPILER}
            COMMAND CXX=${COMPILER} ${CMAKE_COMMAND}
                -DCMAKE_BUILD_TYPE=Debug -GNinja
                -DJSON_BuildTests=ON -DJSON_FastTests=ON
                -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
-                ${ADDITIONAL_FLAGS}
            COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER}
            COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_${COMPILER} && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
            COMMENT "Compile and test with ${COMPILER}"
@@ -800,7 +799,6 @@ add_custom_target(ci_test_compiler_default
        -DCMAKE_BUILD_TYPE=Debug -GNinja
        -DJSON_BuildTests=ON -DJSON_FastTests=ON
        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_compiler_default
-        ${ADDITIONAL_FLAGS}
    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_compiler_default --parallel ${N}
    COMMAND cd ${PROJECT_BINARY_DIR}/build_compiler_default && ${CMAKE_CTEST_COMMAND} --parallel ${N} -LE git_required --output-on-failure
    COMMENT "Compile and test with default C++ compiler"
@@ -823,10 +821,12 @@ add_custom_target(ci_cuda_example

 add_custom_target(ci_module_cpp20
    COMMAND ${CMAKE_COMMAND}
-        -DCMAKE_BUILD_TYPE=Debug -GNinja 
+        -DCMAKE_BUILD_TYPE=Debug -GNinja
        -DJSON_CI=ON -DNLOHMANN_JSON_BUILD_MODULES=ON -DJSON_Install=ON
+        "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}"
        -S${PROJECT_SOURCE_DIR}/tests/module_cpp20 -B${PROJECT_BINARY_DIR}/ci_module_cpp20
    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/ci_module_cpp20
+    VERBATIM
 )

 ###############################################################################
@@ -4,5 +4,11 @@
 # call converts -1 to size_t, which -fsanitize=integer reports as implicit-integer-sign-change. This is
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119429, not a bug in this library. Only that check and only <format> are
 # excluded, so implicit sign changes in the library and the tests are still reported.
+#
+# libstdc++'s <string_view> compares two views of different lengths through `_S_compare(size_type __n1, size_type
+# __n2)`, which stores `__n1 - __n2` in a signed difference_type and clamps it to int. Any comparison with a shorter
+# view wraps that subtraction on purpose, and -fsanitize=integer reports it as implicit-integer-sign-change. json_view
+# compares keys as string views, so the same check is excluded for <string_view> as well.
 [implicit-integer-sign-change]
 src:*/include/c++/*/format
+src:*/include/c++/*/string_view
@@ -49,6 +49,8 @@ cc_library(
    hdrs = [
        "single_include/nlohmann/json.hpp",
        "single_include/nlohmann/json_fwd.hpp",
+        "single_include/nlohmann/json_literals.hpp",
+        "single_include/nlohmann/json_view.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 `v3.10.2`):
+using tag `v3.12.0`):

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

@@ -233,6 +233,7 @@ Strong exception safety: if an exception occurs, the original value stays intact
 - documentation on [checked access](../../features/element_access/checked_access.md)
 - [`operator[]`](operator%5B%5D.md) for unchecked access by reference
 - [`value`](value.md) for access with default value
+- [basic_json_view::at](../basic_json_view/at.md) - the same access on a zero-copy view

 ## Version history

@@ -241,4 +242,6 @@ Strong exception safety: if an exception occurs, the original value stays intact
 3. Added in version 3.11.0. Fixed in version 3.13.0 to consistently accept `std::string_view`-convertible keys, as
   already supported by [`operator[]`](operator[].md), [`value`](value.md), [`find`](find.md), and other lookup
   functions.
-4. Added in version 2.0.0.
+4. Added in version 2.0.0. Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) instead of
+[`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) for a one-character array index that is not
+a digit (e.g., `/x`) in version 3.13.0, as it already did for longer ones.
@@ -58,6 +58,7 @@ Constant.
 ## See also

 - [front](front.md) to access the first element
+- [basic_json_view::back](../basic_json_view/back.md) - the same access on a zero-copy view

 ## Version history

@@ -44,6 +44,8 @@ Constant.
 - [rbegin](rbegin.md) returns a reverse iterator to the last element
 - [items](items.md) returns an iteration proxy to access keys and values during range-based for loops
 - [Iterators](../../features/iterators.md) - the article on iterators
+- [basic_json_view::begin](../basic_json_view/begin.md) - the same iteration on a zero-copy view (in document order,
+  not sorted by key)

 ## Version history

@@ -42,6 +42,7 @@ Constant.
 - [cend](cend.md) returns a const iterator to one past the last element
 - [crbegin](crbegin.md) returns a const reverse iterator to the last element
 - [Iterators](../../features/iterators.md) - the article on iterators
+- [basic_json_view::cbegin](../basic_json_view/cbegin.md) - the same iteration on a zero-copy view

 ## Version history

@@ -42,6 +42,7 @@ Constant.
 - [cbegin](cbegin.md) returns a const iterator to the first element
 - [crend](crend.md) returns a const reverse iterator to one before the first element
 - [Iterators](../../features/iterators.md) - the article on iterators
+- [basic_json_view::cend](../basic_json_view/cend.md) - the same iteration on a zero-copy view

 ## Version history

@@ -10,6 +10,10 @@ bool contains(KeyType&& key) const;

 // (3)
 bool contains(const json_pointer& ptr) const;
+
+// (4)
+template<typename T>
+bool contains(T) const = delete;
 ```

 1. Check whether an element exists in a JSON object with a key equivalent to `key`. If the element is not found or the 
@@ -17,6 +21,9 @@ bool contains(const json_pointer& ptr) const;
 2. See 1. This overload is only available if `KeyType` is comparable with `#!cpp typename object_t::key_type` and
   `#!cpp typename object_comparator_t::is_transparent` denotes a type.
 3. Check whether the given JSON pointer `ptr` can be resolved in the current JSON value.
+4. Deleted: this overload is only available if `T` is an integral type and is declared as deleted, so that a call with
+   an integer `key` (for example, `#!cpp j.contains(0)`) fails to compile. Otherwise, the integer literal `0` would convert to
+   a null `#!cpp const char*` and, from there, to the key type, causing undefined behavior at runtime.

 ## Template parameters

@@ -39,6 +46,7 @@ bool contains(const json_pointer& ptr) const;
   is not an object, `#!cpp false` is returned.
 2. See 1.
 3. `#!cpp true` if the JSON pointer can be resolved to a stored value, `#!cpp false` otherwise.
+4. Deleted; a call with an integral argument does not compile.

 ## Exception safety

@@ -49,6 +57,7 @@ Strong exception safety: if an exception occurs, the original value stays intact
 1. The function does not throw exceptions.
 2. The function does not throw exceptions.
 3. The function does not throw exceptions.
+4. Deleted; a call with an integral argument does not compile.

 ## Complexity

@@ -127,6 +136,7 @@ Logarithmic in the size of the JSON object.

 - [find](find.md) find a value in an object
 - [count](count.md) returns the number of occurrences of a key
+- [basic_json_view::contains](../basic_json_view/contains.md) - the same check on a zero-copy view

 ## Version history

@@ -7,12 +7,19 @@ size_type count(const typename object_t::key_type& key) const;
 // (2)
 template<typename KeyType>
 size_type count(KeyType&& key) const;
+
+// (3)
+template<typename T>
+size_type count(T) const = delete;
 ```

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

 ## Template parameters

@@ -80,6 +87,7 @@ Logarithmic in the size of the JSON object.

 - [find](find.md) find a value in an object
 - [contains](contains.md) checks whether a key exists
+- [basic_json_view::count](../basic_json_view/count.md) - the same check on a zero-copy view

 ## Version history

@@ -62,6 +62,9 @@ Linear.

 ## Notes

+Floating-point numbers are written with the fewest digits that read back as the same value (for `#!cpp double`; see
+[number handling](../../features/types/number_handling.md#number-serialization)).
+
 Binary values are serialized as an object containing two keys:

 - "bytes": an array of bytes as integers
@@ -97,3 +100,5 @@ Binary values are serialized as an object containing two keys:
 - Error handlers added in version 3.4.0.
 - Serialization of binary values added in version 3.8.0.
 - Error handler `keep` added in version 3.13.0.
+- Doubles are written with the shortest digits (Żmij instead of Grisu2) since version 3.13.0; about 0.1% of doubles are
+  written differently, most of them with fewer digits.
@@ -64,6 +64,7 @@ itself is empty which is `#!cpp false` in the case of a string.

 - [size](size.md) returns the number of elements
 - [clear](clear.md) clears the content and resets the value to the default value
+- [basic_json_view::empty](../basic_json_view/empty.md) - the same check on a zero-copy view

 ## Version history

@@ -43,6 +43,7 @@ Constant.
 - [cend](cend.md) returns a const iterator to one past the last element
 - [rend](rend.md) returns a reverse iterator to one before the first element
 - [Iterators](../../features/iterators.md) - the article on iterators
+- [basic_json_view::end](../basic_json_view/end.md) - the same iteration on a zero-copy view

 ## Version history

@@ -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)

@@ -10,12 +10,21 @@ template<typename KeyType>
 iterator find(KeyType&& key);
 template<typename KeyType>
 const_iterator find(KeyType&& key) const;
+
+// (3)
+template<typename T>
+iterator find(T) = delete;
+template<typename T>
+const_iterator find(T) const = delete;
 ```

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

 ## Template parameters

@@ -84,6 +93,7 @@ Logarithmic in the size of the JSON object.

 - [count](count.md) returns the number of occurrences of a key
 - [contains](contains.md) checks whether a key exists
+- [basic_json_view::find](../basic_json_view/find.md) - the same lookup on a zero-copy view

 ## Version history

@@ -124,7 +124,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"

    - Overload (2) replaces calls to `from_bjdata` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.13.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
      `#!cpp from_bjdata(ptr, len, ...);` with `#!cpp from_bjdata(ptr, ptr+len, ...);`.

    You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
@@ -110,7 +110,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"

    - Overload (2) replaces calls to `from_bon8` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.13.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
      `#!cpp from_bon8(ptr, len, ...);` with `#!cpp from_bon8(ptr, ptr+len, ...);`.

    You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
@@ -126,7 +126,8 @@ Linear in the size of the input.
 !!! warning "Deprecation"

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

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

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

    - Overload (2) replaces calls to `from_ubjson` with a pointer and a length as first two parameters, which has been
-      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      deprecated in version 3.8.0. In version 4.0.0, this overload
+      will be deleted (`= delete`) rather than removed. Please replace all calls like
      `#!cpp from_ubjson(ptr, len, ...);` with `#!cpp from_ubjson(ptr, ptr+len, ...);`.
    - Overload (2) replaces calls to `from_ubjson` with a pair of iterators as their first parameter, which has been
      deprecated in version 3.8.0. This overload will be removed in version 4.0.0. Please replace all calls like
@@ -51,6 +51,7 @@ Constant.
 ## See also

 - [back](back.md) to access the last element
+- [basic_json_view::front](../basic_json_view/front.md) - the same access on a zero-copy view

 ## Version history

@@ -183,6 +183,8 @@ overload (3).
 - [get_ref](get_ref.md) get a reference to the stored value
 - [operator ValueType](operator_ValueType.md) get a value via implicit conversion
 - [Converting values](../../features/conversions.md) - the type conversions article
+- [basic_json_view::get](../basic_json_view/get.md) - the same conversion on a zero-copy view (many types are
+  converted without ever building a `basic_json` value)

 ## Version history

@@ -61,6 +61,8 @@ Constant.
 ## See also

 - [get_ptr()](get_ptr.md) get a pointer value
+- [basic_json_view::get_string](../basic_json_view/get_string.md) - the closest counterpart on a zero-copy view: a
+  string without a copy, but as a view rather than a reference to a value that must already exist

 ## Version history

@@ -72,6 +72,7 @@ Depends on the `json_serializer<ValueType>::from_json()` implementation.
 - [get_ref](get_ref.md) get a reference to the stored value
 - [get_ptr](get_ptr.md) get a pointer to the stored value
 - [Converting values](../../features/conversions.md) - the type conversions article
+- [basic_json_view::get_to](../basic_json_view/get_to.md) - the same conversion on a zero-copy view

 ## Version history

@@ -40,6 +40,7 @@ Constant.
 - [is_structured](is_structured.md) checks whether the JSON value is structured (array or object)
 - [type](type.md) returns the type of the JSON value
 - [array_t](array_t.md) the type used to store JSON arrays
+- [basic_json_view::is_array](../basic_json_view/is_array.md) - the same check on a zero-copy view

 ## Version history

@@ -39,6 +39,7 @@ Constant.
 - [is_primitive](is_primitive.md) checks whether the JSON value is primitive
 - [binary_t](binary_t.md) the type used to store binary values
 - [get_binary](get_binary.md) returns a reference to the stored binary value
+- [basic_json_view::is_binary](../basic_json_view/is_binary.md) - the same check on a zero-copy view

 ## Version history

@@ -38,6 +38,7 @@ Constant.

 - [boolean_t](boolean_t.md) the type used to store JSON booleans
 - [is_primitive](is_primitive.md) checks whether the JSON value is primitive
+- [basic_json_view::is_boolean](../basic_json_view/is_boolean.md) - the same check on a zero-copy view

 ## Version history

@@ -85,6 +85,11 @@ with `allow_exceptions` set to `#!cpp false`: a parse error then yields a discar
    --8<-- "examples/is_discarded__parse.output"
    ```

+## See also
+
+- [basic_json_view::is_discarded](../basic_json_view/is_discarded.md) - the corresponding check on a zero-copy view,
+  which is `#!cpp true` if the view refers to no value
+
 ## Version history

 - Added in version 1.0.0.
@@ -40,6 +40,7 @@ Constant.
 - [is_object](is_object.md) checks whether the JSON value is an object
 - [type](type.md) returns the type of the JSON value
 - [value_t](value_t.md) the enumeration of JSON types
+- [basic_json_view::is_null](../basic_json_view/is_null.md) - the same check on a zero-copy view

 ## Version history

@@ -49,6 +49,7 @@ constexpr bool is_number() const noexcept
 - [is_number_integer()](is_number_integer.md) check if the value is an integer or unsigned integer number
 - [is_number_unsigned()](is_number_unsigned.md) check if the value is an unsigned integer number
 - [is_number_float()](is_number_float.md) check if the value is a floating-point number
+- [basic_json_view::is_number](../basic_json_view/is_number.md) - the same check on a zero-copy view

 ## Version history

@@ -40,6 +40,7 @@ Constant.
 - [is_number()](is_number.md) check if the value is a number
 - [is_number_integer()](is_number_integer.md) check if the value is an integer or unsigned integer number
 - [is_number_unsigned()](is_number_unsigned.md) check if the value is an unsigned integer number
+- [basic_json_view::is_number_float](../basic_json_view/is_number_float.md) - the same check on a zero-copy view

 ## Version history

@@ -40,6 +40,7 @@ Constant.
 - [is_number()](is_number.md) check if the value is a number
 - [is_number_unsigned()](is_number_unsigned.md) check if the value is an unsigned integer number
 - [is_number_float()](is_number_float.md) check if the value is a floating-point number
+- [basic_json_view::is_number_integer](../basic_json_view/is_number_integer.md) - the same check on a zero-copy view

 ## Version history

@@ -40,6 +40,7 @@ Constant.
 - [is_number()](is_number.md) check if the value is a number
 - [is_number_integer()](is_number_integer.md) check if the value is an integer or unsigned integer number
 - [is_number_float()](is_number_float.md) check if the value is a floating-point number
+- [basic_json_view::is_number_unsigned](../basic_json_view/is_number_unsigned.md) - the same check on a zero-copy view

 ## Version history

@@ -40,6 +40,7 @@ Constant.
 - [is_structured](is_structured.md) checks whether the JSON value is structured (array or object)
 - [type](type.md) returns the type of the JSON value
 - [object_t](object_t.md) the type used to store JSON objects
+- [basic_json_view::is_object](../basic_json_view/is_object.md) - the same check on a zero-copy view

 ## Version history

@@ -62,6 +62,7 @@ This library extends primitive types to binary types, because binary types are r
 - [is_boolean()](is_boolean.md) returns whether the JSON value is a boolean
 - [is_number()](is_number.md) returns whether the JSON value is a number
 - [is_binary()](is_binary.md) returns whether the JSON value is a binary array
+- [basic_json_view::is_primitive](../basic_json_view/is_primitive.md) - the same check on a zero-copy view

 ## Version history

@@ -39,6 +39,7 @@ Constant.
 - [is_primitive](is_primitive.md) checks whether the JSON value is primitive
 - [type](type.md) returns the type of the JSON value
 - [string_t](string_t.md) the type used to store JSON strings
+- [basic_json_view::is_string](../basic_json_view/is_string.md) - the same check on a zero-copy view

 ## Version history

@@ -57,6 +57,7 @@ Note that though strings are containers in C++, they are treated as primitive va
 - [is_primitive()](is_primitive.md) returns whether JSON value is primitive
 - [is_array()](is_array.md) returns whether the value is an array
 - [is_object()](is_object.md) returns whether the value is an object
+- [basic_json_view::is_structured](../basic_json_view/is_structured.md) - the same check on a zero-copy view

 ## Version history

@@ -99,6 +99,8 @@ When iterating over an array, `key()` will return the index of the element as st

 - [begin](begin.md) returns an iterator to the first element
 - [end](end.md) returns an iterator to one past the last element
+- [basic_json_view::items](../basic_json_view/items.md) - the same range on a zero-copy view (`#!cpp const auto`,
+  not `#!cpp const auto&`: items are produced on the fly)

 ## Version history

@@ -62,5 +62,5 @@ same name. Hidden members remain accessible via [`as_base_class`](as_base_class.

 ## Version history

- Added in version 3.12.0.
+- Added in version 3.11.3.
 - Made a public member type in version 3.13.0; it was private before, so it could not be named outside the class.
@@ -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).
@@ -26,8 +26,7 @@ To store objects in C++, a type is defined by the template parameters described

 `StringType`
 :   the type of the keys or names (e.g., `std::string`). The comparison function `std::less<StringType>` is used to
-    order elements inside the container. `object_t::key_type` must be implicitly convertible to `string_t` (required by the
-    binary formats).
+    order elements inside the container.

 `AllocatorType`
 :   the allocator to use for objects (e.g., `std::allocator`)
@@ -275,6 +275,8 @@ Strong exception safety: if an exception occurs, the original value stays intact
 - documentation on [runtime assertions](../../features/assertions.md)
 - see [`at`](at.md) for access by reference with range checking
 - see [`value`](value.md) for access with default value
+- [basic_json_view::operator[]](../basic_json_view/operator%5B%5D.md) - the same access on a zero-copy view (always
+  returns a discarded view instead of assuming undefined behavior)

 ## Version history

@@ -286,4 +288,6 @@ Strong exception safety: if an exception occurs, the original value stays intact
 3. Added in version 3.11.0. Fixed in version 3.13.0 to consistently accept `std::string_view`-convertible keys, as
   already supported by [`at`](at.md), [`value`](value.md), [`find`](find.md), and other lookup functions.
 4. Added in version 2.0.0. A missing array index in the const version is guarded by a runtime assertion since
-   version 3.13.0.
+   version 3.13.0. Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) instead of
+[`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) for a one-character array index that is not
+a digit (e.g., `/x`) in version 3.13.0, as it already did for longer ones.
@@ -112,3 +112,6 @@ is thrown. In any case, the original value is not changed: the patch is applied
  location has a non-object/non-array parent in version 3.13.0.
 - Added [`out_of_range.414`](../../home/exceptions.md#jsonexceptionout_of_range414) and rejected a "move" operation whose "from" location is a proper
  prefix of its "path" location instead of silently producing a corrupted result in version 3.13.0.
+- Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) instead of
+  [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) for a one-character array index that is
+  not a digit (e.g., `/x`) in version 3.13.0, as it already did for longer ones.
@@ -110,3 +110,6 @@ function throws an exception.
  location has a non-object/non-array parent in version 3.13.0.
 - Added [`out_of_range.414`](../../home/exceptions.md#jsonexceptionout_of_range414) and rejected a "move" operation whose "from" location is a proper
  prefix of its "path" location instead of silently producing a corrupted result in version 3.13.0.
+- Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) instead of
+  [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) for a one-character array index that is
+  not a digit (e.g., `/x`) in version 3.13.0, as it already did for longer ones.
@@ -55,6 +55,7 @@ JSON value which is `1` in the case of a string.

 - [empty](empty.md) checks whether the JSON value has no elements
 - [max_size](max_size.md) returns the maximum possible number of elements
+- [basic_json_view::size](../basic_json_view/size.md) - the same function on a zero-copy view

 ## Version history

@@ -123,6 +123,4 @@ Linear in the size of the JSON value `j`.
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
 - Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
-  array or object was silently skipped, producing invalid BJData.
- Writes unsigned integers wider than 64 bits as high-precision numbers since version 3.13.0; previously, they were
-  silently truncated to 64 bits.
+  array or object was silently skipped, producing invalid BJData.
@@ -37,11 +37,12 @@ With (2), the bytes written before the exception remain in the output adapter.

 ## Exceptions

- Throws [out_of_range.407](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains an integer outside
-  the range of int64 (an unsigned integer above 9223372036854775807, or, with a number type wider than 64 bits, any
-  integer beyond int64), which BON8 cannot represent
+- Throws [out_of_range.407](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains an unsigned integer
+  above 9223372036854775807, which BON8 cannot represent
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if `j` contains a string that is not
  valid UTF-8
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if `j` or a value nested in it is
+  discarded; example: `"cannot serialize discarded value to BON8"`

 ## Complexity

@@ -47,10 +47,6 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va

 - Throws [`type_error.317`](../../home/exceptions.md#jsonexceptiontype_error317) if the top-level type of the JSON value
  is not an object; example: `"to serialize to BSON, top-level type must be object, but is string"`
- Throws [`out_of_range.407`](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains a signed integer
-  outside the range of int64 or an unsigned integer outside the range of uint64, which is only possible with a number
-  type wider than 64 bits; example:
-  `"integer number 9223372036854775808 cannot be represented by BSON as it does not fit int64"`
 - Throws [`out_of_range.409`](../../home/exceptions.md#jsonexceptionout_of_range409) if a key in the JSON object contains
  a null byte (code point U+0000); example: `"BSON key cannot contain code point U+0000 (at byte 2)"`
 - Throws [`out_of_range.412`](../../home/exceptions.md#jsonexceptionout_of_range412) if the length of a document, array,
@@ -123,5 +119,3 @@ pass before anything is written.
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316` before anything
  is written.
- Throws `out_of_range.407` for integers that do not fit 64 bits since version 3.13.0; previously, integers of a
-  number type wider than 64 bits were silently truncated.
@@ -46,9 +46,6 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va

 ## Exceptions

- Throws [`out_of_range.407`](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains an integer
-  outside [-2^64, 2^64-1], which is only possible with a number type wider than 64 bits; example:
-  `"integer number 18446744073709551616 cannot be represented by CBOR as it does not fit [-2^64, 2^64-1]"`
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key in `j` is
  not valid UTF-8 and `error_handler` is `strict` (the default only if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled)
@@ -93,5 +90,3 @@ Linear in the size of the JSON value `j`.
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
 - Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
  array or object was silently skipped, producing invalid CBOR.
- Throws `out_of_range.407` for integers that do not fit 64 bits since version 3.13.0; previously, integers of a
-  number type wider than 64 bits were silently truncated.
@@ -46,9 +46,6 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va

 ## Exceptions

- Throws [`out_of_range.407`](../../home/exceptions.md#jsonexceptionout_of_range407) if `j` contains an integer
-  outside [-2^63, 2^64-1], which is only possible with a number type wider than 64 bits; example:
-  `"integer number 18446744073709551616 cannot be represented by MessagePack as it does not fit [-2^63, 2^64-1]"`
 - Throws [`out_of_range.412`](../../home/exceptions.md#jsonexceptionout_of_range412) if the length of a string, binary
  value, array, or object exceeds 4294967295, the maximum MessagePack can store; example:
  `"MessagePack length 4294967296 exceeds maximum of 4294967295"`
@@ -115,5 +112,3 @@ Linear in the size of the JSON value `j`.
  `number_unsigned_t`.
 - Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
  array or object was silently skipped, producing invalid MessagePack.
- Throws `out_of_range.407` for integers that do not fit 64 bits since version 3.13.0; previously, integers of a
-  number type wider than 64 bits were silently truncated.
@@ -52,6 +52,7 @@ Constant.
 - [operator value_t](operator_value_t.md) implicit conversion operator equivalent to this named member function
 - [type_name](type_name.md) returns the type as a string, for use in error messages
 - [value_t](value_t.md) the enumeration of JSON types
+- [basic_json_view::type](../basic_json_view/type.md) - the same function on a zero-copy view

 ## Version history

@@ -56,6 +56,7 @@ Constant.

 - [type](type.md) returns the type of the JSON value
 - [value_t](value_t.md) the enumeration of JSON types
+- [basic_json_view::type_name](../basic_json_view/type_name.md) - the same function on a zero-copy view

 ## Version history

@@ -36,8 +36,9 @@ The function can throw the following exceptions:
 - Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) if an array index in a key is not a
  number; example: `"array index 'one' is not a number"`
 - Throws [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) if a level becomes an array
-  (because one of its keys is `0`) and another key at that level cannot be an array index; example:
-  `"unresolved reference token 'x'"`
+  (because one of its keys is `0`) and another key at that level begins with a digit but is not a valid array index
+  (such as `1a`), or is `-`; example:
+  `"unresolved reference token '-'"`

 ## Complexity

@@ -80,3 +81,6 @@ Apart from these two cases, for a JSON value `j`, the following is always true:

 - Added in version 2.0.0.
 - Made the array/object decision independent of the object's iteration order in version 3.13.0.
+- Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) instead of
+  [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) for a one-character array index that is
+  not a digit (e.g., `/x`) in version 3.13.0, as it already did for longer ones.
@@ -119,6 +119,14 @@ changes to any JSON value.

 ## Notes

+!!! warning "`null` members are not missing"
+
+    The default value is used only if the key (or JSON Pointer) does not exist. A member that exists but is
+    `#!json null` is converted like any other value, so `#!cpp j.value("k", 0)` throws a
+    [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) if `"k"` is `#!json null`. See
+    [Access with default value](../../features/element_access/default_value.md)
+    for alternatives.
+
 !!! warning "Return type"

    The value function is a template, and the return type of the function is determined by the type of the provided
@@ -216,6 +224,7 @@ changes to any JSON value.

 - see [`at`](at.md) for access by reference with range checking
 - see [`operator[]`](operator%5B%5D.md) for unchecked access by reference
+- [basic_json_view::value](../basic_json_view/value.md) - the same access on a zero-copy view

 ## Version history

@@ -227,4 +236,6 @@ changes to any JSON value.
   [`operator[]`](operator[].md), [`at`](at.md), [`find`](find.md), and other lookup functions.
 3. Added in version 2.0.2. Extended to work with arrays in version 3.13.0, including fixing an issue where resolving
   `ptr` through an array unexpectedly threw `out_of_range` instead of returning the resolved element (or
-   `default_value`, as documented).
+   `default_value`, as documented). Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109)
+   instead of returning `default_value` for a one-character array index that is not a digit (e.g., `/x`) in version
+   3.13.0, as it already did for longer ones.
@@ -0,0 +1,72 @@
+# <small>nlohmann::basic_json_document::</small>accept
+
+```cpp
+template<typename InputType>
+static bool accept(InputType&& input,
+                   const bool ignore_comments = false,
+                   const bool ignore_trailing_commas = false);
+```
+
+Checks whether the input is valid JSON, accepting and rejecting exactly what
+[`BasicJsonType::accept()`](../basic_json/accept.md) does, with the same options. Unlike [`parse()`](parse.md), this
+function never throws an exception for invalid input, and the returned `#!cpp bool` is the only result -- no document
+is returned.
+
+## Template parameters
+
+`InputType`
+:   A compatible input; see [`parse`](parse.md#template-parameters).
+
+## Parameters
+
+`input` (in)
+:   Input to check.
+
+`ignore_comments` (in)
+:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
+    (`#!cpp false`); (optional, `#!cpp false` by default)
+
+`ignore_trailing_commas` (in)
+:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
+    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
+
+## Return value
+
+Whether the input is valid JSON.
+
+## Exception safety
+
+Strong guarantee: this function itself never throws for an invalid input; it can only throw what allocating the
+input's own copy (for inputs that are always read into a buffer) throws.
+
+## Complexity
+
+Linear in the length of the input.
+
+## Notes
+
+An integer argument that is not a `#!cpp bool` where the flags are expected, such as `#!cpp accept(ptr, len)`, does not
+compile; see [`parse`](parse.md#notes).
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__accept.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__accept.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input
+- [`BasicJsonType::accept`](../basic_json/accept.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,58 @@
+# <small>nlohmann::basic_json_document::</small>basic_json_document
+
+```cpp
+// (1)
+basic_json_document() = default;
+
+// (2)
+basic_json_document(basic_json_document&& other) noexcept = default;
+
+// (3)
+basic_json_document(const basic_json_document&) = delete;
+```
+
+1. Creates an empty (discarded) document: [`root()`](root.md) returns a discarded view, and
+   [`is_discarded()`](is_discarded.md) is `#!cpp true`.
+2. Move constructor. Takes over `other`'s index and, if owned, its text; `other` is left as an empty document. Views
+   taken from `other` before the move remain valid, because the index is heap-allocated independently of the
+   `basic_json_document` object.
+3. `basic_json_document` is move-only. Copying is disabled because it would either duplicate a potentially large index
+   and text, or leave two documents claiming to borrow the same buffer.
+
+## Parameters
+
+`other` (in)
+:   another document to move the index and text from
+
+## Exception safety
+
+No-throw guarantee: the default and move constructors never throw exceptions.
+
+## Complexity
+
+Constant, for the default and move constructors.
+
+## Examples
+
+??? example
+
+    The example below shows the default constructor and demonstrates that `basic_json_document` is move-only.
+
+    ```cpp
+    --8<-- "examples/basic_json_document__basic_json_document.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__basic_json_document.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input
+- [is_discarded](is_discarded.md) - return whether the last parse failed
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,56 @@
+# <small>nlohmann::</small>basic_json_document
+
+<small>Defined in header `<nlohmann/json_view.hpp>`</small>
+
+```cpp
+template<typename BasicJsonType>
+class basic_json_document;
+```
+
+A parsed JSON text, held as a flat index of its values
+([16 bytes per value](../../home/architecture.md#node-index-of-json-views)) instead of a tree of `BasicJsonType` values.
+Strings and numbers stay in the source text; only strings that contain escapes are decoded, into one buffer owned by
+the document. [`basic_json_view`](../basic_json_view/index.md) is a read-only handle to one value of a
+`basic_json_document`; [`materialize()`](../basic_json_view/materialize.md) turns a subtree back into the
+`BasicJsonType` value that [`BasicJsonType::parse()`](../basic_json/parse.md) would have produced for it.
+
+A document may **borrow** the text it was parsed from (the caller's buffer must then outlive the document) or **own**
+it (a copy, or an rvalue `#!cpp std::string` that was moved in); see [`owns_source`](owns_source.md). `basic_json_document`
+is move-only: copying a document would either duplicate a potentially large index and text, or leave two documents
+claiming to borrow the same buffer, so it is disabled.
+
+## Template parameters
+
+`BasicJsonType`
+:   a specialization of [`basic_json`](../basic_json/index.md), for instance [`json`](../json.md) or
+    [`ordered_json`](../ordered_json.md). Only 64-bit `number_integer_t`/`number_unsigned_t` types are supported; this
+    is checked with a `static_assert`.
+
+## Specializations
+
+- [**json_document**](../json_document.md) - documents of the default specialization [`json`](../json.md)
+- [**ordered_json_document**](../ordered_json_document.md) - documents of [`ordered_json`](../ordered_json.md)
+
+## Member types
+
+- **view_type** - the type of view returned by [`root()`](root.md) (`#!cpp basic_json_view<BasicJsonType>`)
+- **value_t** - the JSON type enumeration, see [`basic_json::value_t`](../basic_json/value_t.md)
+
+## Member functions
+
+- [(constructor)](basic_json_document.md)
+- [**parse**](parse.md) (_static_) - deserialize from a compatible input, borrowing or owning it as appropriate
+- [**parse_copy**](parse_copy.md) (_static_) - deserialize a copy of a compatible input
+- [**accept**](accept.md) (_static_) - check whether the input is valid JSON
+- [**read**](read.md) - (re-)parse into this document, reusing its memory
+- [**root**](root.md) - the view of the root value
+- [**is_discarded**](is_discarded.md) - return whether the last parse failed
+- [**source**](source.md) - the parsed text
+- [**owns_source**](owns_source.md) - return whether the document holds its own copy of the text
+- [**node_count**](node_count.md) - the number of index entries (values plus object keys)
+- [**memory_usage**](memory_usage.md) - the number of bytes held by the document
+- [**shrink_to_fit**](shrink_to_fit.md) - release unused index capacity
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,49 @@
+# <small>nlohmann::basic_json_document::</small>is_discarded
+
+```cpp
+bool is_discarded() const noexcept;
+```
+
+Returns whether the document holds no value, either because it was default-constructed or because the last call to
+[`parse()`](parse.md), [`parse_copy()`](parse_copy.md), or [`read()`](read.md) failed with `allow_exceptions` set to
+`#!cpp false`.
+
+## Return value
+
+`#!cpp true` if the document is discarded, `#!cpp false` otherwise.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+When the document is discarded, [`root()`](root.md) returns a discarded view (its
+[`is_discarded()`](../basic_json_view/is_discarded.md) is also `#!cpp true`).
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__is_discarded.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__is_discarded.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input
+- [is_discarded (basic_json_view)](../basic_json_view/is_discarded.md) - return whether a view is invalid
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,50 @@
+# <small>nlohmann::basic_json_document::</small>memory_usage
+
+```cpp
+std::size_t memory_usage() const noexcept;
+```
+
+Returns the number of bytes held by the document: the node index, the decoded-string buffer (for strings that
+contain escapes), and, for an owned document, its copy of the source text.
+
+## Return value
+
+The number of bytes the document holds, `0` for a [discarded](is_discarded.md) document.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+The exact value depends on the platform, the allocator, and the library's own layout, and may change between
+versions; do not rely on it being a specific number, and do not compare it across different builds or platforms.
+Compare it for the same document over time, or between documents built with the same binary, instead -- for instance
+to observe the effect of [`shrink_to_fit()`](shrink_to_fit.md).
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__memory_usage.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__memory_usage.output"
+    ```
+
+## See also
+
+- [node_count](node_count.md) - the number of index entries
+- [shrink_to_fit](shrink_to_fit.md) - release unused index capacity
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,49 @@
+# <small>nlohmann::basic_json_document::</small>node_count
+
+```cpp
+std::size_t node_count() const noexcept;
+```
+
+Returns the number of entries in the document's flat index.
+
+## Return value
+
+The number of index entries: one per value (of any type, at any nesting depth) plus one per object key. `0` for a
+[discarded](is_discarded.md) document.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+Each index entry is [16 bytes](../../home/architecture.md#node-index-of-json-views), so `#!cpp node_count() * 16` is
+the size of the index itself (part, but not all, of [`memory_usage()`](memory_usage.md), which also counts decoded
+strings and, for an owned document, the text).
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__node_count.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__node_count.output"
+    ```
+
+## See also
+
+- [memory_usage](memory_usage.md) - the number of bytes held by the document
+- [shrink_to_fit](shrink_to_fit.md) - release unused index capacity
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,49 @@
+# <small>nlohmann::basic_json_document::</small>owns_source
+
+```cpp
+bool owns_source() const noexcept;
+```
+
+Returns whether the document holds its own copy of the parsed text, as opposed to borrowing the caller's buffer.
+
+## Return value
+
+`#!cpp true` if the document owns the text returned by [`source()`](source.md), `#!cpp false` if it borrows it (or if
+the document is [discarded](is_discarded.md)).
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+See the ownership table on [`parse`](parse.md#notes) for which inputs are borrowed and which are owned. A borrowed
+document (`#!cpp owns_source() == false`) is only valid while the buffer it was parsed from is still alive.
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__owns_source.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__owns_source.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input
+- [parse_copy](parse_copy.md) - deserialize a copy of a compatible input, always owned
+- [source](source.md) - the parsed text
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,154 @@
+# <small>nlohmann::basic_json_document::</small>parse
+
+```cpp
+// (1)
+template<typename InputType>
+static basic_json_document parse(InputType&& input,
+                                 const bool allow_exceptions = true,
+                                 const bool ignore_comments = false,
+                                 const bool ignore_trailing_commas = false);
+
+// (2)
+template<typename IteratorType>
+static basic_json_document parse(IteratorType first, IteratorType last,
+                                 const bool allow_exceptions = true,
+                                 const bool ignore_comments = false,
+                                 const bool ignore_trailing_commas = false);
+```
+
+1. Deserialize from a compatible input, borrowing or owning it depending on its value category and type (see Notes).
+2. Deserialize from a pair of input iterators.
+
+Both overloads accept the same JSON text as [`BasicJsonType::parse()`](../basic_json/parse.md), with the same
+`ignore_comments`/`ignore_trailing_commas` options, but build a [`basic_json_document`](index.md) (a flat index into
+the input) instead of a tree of `BasicJsonType` values. The input must be byte-oriented (see the template parameters
+below): not every input type of `BasicJsonType::parse()` is supported.
+
+## Template parameters
+
+`InputType`
+:   A byte-oriented input, one of:
+
+    - a `#!cpp std::string`, `#!cpp std::string_view`, or a C-style array of single-byte characters
+    - a pointer to a null-terminated string of single-byte characters (`#!cpp char`, `#!cpp signed char`,
+      `#!cpp unsigned char`, `#!cpp std::uint8_t`)
+    - a container for which `#!cpp obj.data()` and `#!cpp obj.size()` give contiguous single-byte access, e.g.
+      `#!cpp std::vector<char>` or `#!cpp std::vector<std::uint8_t>`
+    - an `#!cpp std::istream` object
+    - a wide string object (`#!cpp std::wstring`, `#!cpp std::u16string`, `#!cpp std::u32string`), which is converted
+      to UTF-8
+
+    Other inputs are not supported: a `#!cpp FILE*`, and pointers to or arrays of wide characters (`#!cpp wchar_t`,
+    `#!cpp char16_t`, `#!cpp char32_t`) are rejected at compile time by a `#!cpp static_assert`. (Use
+    [`BasicJsonType::parse()`](../basic_json/parse.md) for these.)
+
+`IteratorType`
+:   an input iterator type, for instance a pair of pointers such as `ptr` and `ptr + len`, or a pair of
+    `#!cpp std::string::iterator`; the iterators of single-byte characters are borrowed or read like the byte inputs
+    above, those of wide characters are converted to UTF-8
+
+## Parameters
+
+`input` (in)
+:   Input to parse from.
+
+`allow_exceptions` (in)
+:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
+
+`ignore_comments` (in)
+:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
+    (`#!cpp false`); (optional, `#!cpp false` by default)
+
+`ignore_trailing_commas` (in)
+:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
+    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
+
+`first` (in)
+:   iterator to the start of a character range
+
+`last` (in)
+:   iterator to the end of a character range
+
+## Return value
+
+The parsed document. If `allow_exceptions` is `#!cpp false` and the input is not valid JSON, the returned document is
+discarded; see [`is_discarded`](is_discarded.md).
+
+## Exceptions
+
+Throws the same exception [`BasicJsonType::parse()`](../basic_json/parse.md) throws for the same input and options --
+the same exception id, message, and position -- because on a failing input the library's own parser is run on the
+same bytes to produce the diagnostic. Additionally throws
+[`out_of_range.416`](../../home/exceptions.md#jsonexceptionout_of_range416) if the input is 4294967280 bytes (4 GiB
+minus 16 bytes) or larger, a size [`BasicJsonType::parse()`](../basic_json/parse.md) does not reject.
+
+## Complexity
+
+Linear in the length of the input.
+
+## Notes
+
+**Ownership.** Whether the document borrows `input` or owns a copy of it depends on its value category and type:
+
+| `input`                                                                             | ownership                                                    |
+|--------------------------------------------------------------------------------------|--------------------------------------------------------------|
+| lvalue byte container (`std::string`, `std::vector<char>`, ...), `std::string_view`, C string, character array | **borrowed** -- `input` must outlive the document |
+| non-const rvalue `#!cpp std::string`                                                  | **owned**, moved in without a copy                            |
+| other rvalue byte container (including a `#!cpp const` rvalue `#!cpp std::string`)  | **owned**, copied                                             |
+| stream, wide string, or anything else read through the general input adapter          | **owned**, read into a buffer (a stream is read to its end)   |
+
+For overload (2), a pair of pointers to single-byte integers (e.g. `#!cpp const char*`, `#!cpp std::uint8_t*`) is
+borrowed. From C++20 on, so is any other contiguous iterator over single bytes, such as
+`#!cpp std::vector<char>::iterator` or `#!cpp std::string::const_iterator`. Before C++20 these iterators cannot be
+told apart from other class-type iterators, so their range is read into an owned buffer, as is any non-contiguous
+range (e.g. of a `#!cpp std::list<char>`).
+
+See [`owns_source`](owns_source.md) to check which happened after a call, and the
+[feature page](../../features/json_view.md) for the reasoning.
+
+**Numbers.** As for [`BasicJsonType::parse()`](../basic_json/parse.md), an integer literal too large for the 64-bit
+integer type becomes a floating-point value.
+
+**No lengths.** An integer argument that is not a `#!cpp bool` where the flags are expected -- for example
+`#!cpp parse(ptr, len)` -- does not compile (the overload is deleted). Such a call would convert `len` to
+`allow_exceptions` and read `ptr` as a null-terminated string, past the end of a buffer that has none. To parse a
+buffer of a given length, pass a pair of pointers: `#!cpp parse(ptr, ptr + len)`. The same holds for
+[`parse_copy`](parse_copy.md), [`accept`](accept.md), and [`read`](read.md).
+
+## Examples
+
+??? example "Example: (1) borrowed vs. owned input, and errors identical to `BasicJsonType::parse()`"
+
+    ```cpp
+    --8<-- "examples/basic_json_document__parse.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__parse.output"
+    ```
+
+??? example "Example: (2) parse an iterator range (no NUL terminator required)"
+
+    ```cpp
+    --8<-- "examples/basic_json_document__parse_iterator_pair.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__parse_iterator_pair.output"
+    ```
+
+## See also
+
+- [parse_copy](parse_copy.md) - deserialize a copy of a compatible input
+- [accept](accept.md) - check whether the input is valid JSON
+- [read](read.md) - (re-)parse into this document, reusing its memory
+- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
+- [`BasicJsonType::parse`](../basic_json/parse.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,80 @@
+# <small>nlohmann::basic_json_document::</small>parse_copy
+
+```cpp
+template<typename InputType>
+static basic_json_document parse_copy(InputType&& input,
+                                      const bool allow_exceptions = true,
+                                      const bool ignore_comments = false,
+                                      const bool ignore_trailing_commas = false);
+```
+
+Deserialize from a compatible input, always taking the document's own copy of it, regardless of the value category or
+type of `input`. Unlike [`parse()`](parse.md), the returned document never depends on `input` staying alive.
+
+## Template parameters
+
+`InputType`
+:   A compatible input; see [`parse`](parse.md#template-parameters).
+
+## Parameters
+
+`input` (in)
+:   Input to parse from.
+
+`allow_exceptions` (in)
+:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
+
+`ignore_comments` (in)
+:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
+    (`#!cpp false`); (optional, `#!cpp false` by default)
+
+`ignore_trailing_commas` (in)
+:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
+    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
+
+## Return value
+
+The parsed document, with [`owns_source()`](owns_source.md) `#!cpp true`. If `allow_exceptions` is `#!cpp false` and
+the input is not valid JSON, the returned document is discarded; see [`is_discarded`](is_discarded.md).
+
+## Exceptions
+
+Same as [`parse`](parse.md#exceptions).
+
+## Complexity
+
+Linear in the length of the input.
+
+## Notes
+
+`parse_copy()` accepts and rejects exactly what [`parse()`](parse.md) does, and classifies numbers the same way; it
+only differs in that the input is always copied rather than sometimes borrowed. Prefer [`parse()`](parse.md) when the
+input's lifetime already covers the document's, since it avoids the copy for borrowed inputs.
+
+An integer argument that is not a `#!cpp bool` where the flags are expected, such as `#!cpp parse_copy(ptr, len)`, does not
+compile; see [`parse`](parse.md#notes).
+
+## Examples
+
+??? example
+
+    The example below returns a document from a function whose local buffer would otherwise not outlive it.
+
+    ```cpp
+    --8<-- "examples/basic_json_document__parse_copy.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__parse_copy.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input, borrowing it where possible
+- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,79 @@
+# <small>nlohmann::basic_json_document::</small>read
+
+```cpp
+template<typename InputType>
+void read(InputType&& input,
+         const bool allow_exceptions = true,
+         const bool ignore_comments = false,
+         const bool ignore_trailing_commas = false);
+```
+
+(Re-)parses `input` into `#!cpp *this`, discarding the document's previous value and reusing its memory (the node
+index, the decoded-string buffer, and, if applicable, the owned copy of the text) rather than allocating a fresh
+document. [`parse()`](parse.md) is implemented in terms of this function, applied to a default-constructed document.
+
+## Template parameters
+
+`InputType`
+:   A compatible input; see [`parse`](parse.md#template-parameters).
+
+## Parameters
+
+`input` (in)
+:   Input to parse from.
+
+`allow_exceptions` (in)
+:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
+
+`ignore_comments` (in)
+:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
+    (`#!cpp false`); (optional, `#!cpp false` by default)
+
+`ignore_trailing_commas` (in)
+:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
+    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
+
+## Exceptions
+
+Same as [`parse`](parse.md#exceptions).
+
+## Complexity
+
+Linear in the length of the input.
+
+## Notes
+
+Every view taken from `#!cpp *this` before the call -- including the previous [`root()`](root.md) -- is invalidated,
+whether or not the new parse succeeds; take fresh views from [`root()`](root.md) afterward.
+
+`input` is borrowed or owned by the same rules as [`parse()`](parse.md#notes); a document can borrow on one call and
+own on the next, since ownership is decided freshly each time.
+
+An integer argument that is not a `#!cpp bool` where the flags are expected, such as `#!cpp read(ptr, len)`, does not
+compile; see [`parse`](parse.md#notes).
+
+## Examples
+
+??? example
+
+    The example below parses a sequence of messages into the same document, reusing its memory instead of allocating
+    a new document for each one.
+
+    ```cpp
+    --8<-- "examples/basic_json_document__read.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__read.output"
+    ```
+
+## See also
+
+- [parse](parse.md) - deserialize from a compatible input
+- [root](root.md) - the view of the root value
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,65 @@
+# <small>nlohmann::basic_json_document::</small>root
+
+```cpp
+// (1)
+view_type root() const& noexcept;
+
+// (2)
+view_type root() const&& = delete;
+```
+
+1. Returns a view of the root value of the document.
+2. Deleted: the view of a temporary document would dangle.
+
+## Return value
+
+A [`view_type`](index.md#member-types) (i.e. `#!cpp basic_json_view<BasicJsonType>`) for the root value, or a
+discarded view if the document is [discarded](is_discarded.md).
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+**Lifetime.** A view refers into the document, so the document must outlive it. `root()` can therefore only be called
+on a document that has a name (an lvalue); calling it on a temporary does not compile:
+
+```cpp
+auto v = json_document::parse(text).root();  // error: the document is destroyed at the end of the statement
+
+auto doc = json_document::parse(text);       // OK: keep the document alive
+auto v = doc.root();
+```
+
+`root()` is a cheap handle into the document's index, not a copy of anything; call it as often as needed. The
+returned view is valid under the same conditions as any other view of the document -- see
+[Object inspection](../basic_json_view/index.md) -- in particular, it is invalidated by the next
+[`read()`](read.md) or [`shrink_to_fit()`](shrink_to_fit.md) on this document.
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__root.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__root.output"
+    ```
+
+## See also
+
+- [is_discarded](is_discarded.md) - return whether the last parse failed
+- [materialize](../basic_json_view/materialize.md) - build the `BasicJsonType` value of a subtree
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,58 @@
+# <small>nlohmann::basic_json_document::</small>shrink_to_fit
+
+```cpp
+void shrink_to_fit();
+```
+
+Releases capacity that is no longer needed, both of the node index and of the buffer for decoded strings (strings that
+contained escape sequences), e.g. after [`read()`](read.md) replaced a large document with a much smaller one. Like
+`#!cpp std::vector::shrink_to_fit()`, this is a non-binding request: the library may keep more capacity than strictly
+necessary.
+
+## Exception safety
+
+Strong guarantee: if an exception is thrown, there are no changes to the document.
+
+## Exceptions
+
+May throw `#!cpp std::bad_alloc` if the reallocation fails; on exception, the document is unchanged.
+
+## Complexity
+
+Linear in [`node_count()`](node_count.md) plus the length of the decoded strings.
+
+## Notes
+
+!!! warning "Invalidates views"
+
+    Unlike moving the document, `shrink_to_fit()` **invalidates every view taken from this document before the
+    call**, including a previously obtained [`root()`](root.md): the node index is moved into a new, smaller
+    allocation, and the old one is freed. Take a fresh view from [`root()`](root.md) after calling this function.
+
+This is unlike `#!cpp std::vector::shrink_to_fit()`, which promises nothing about validity but in practice often
+leaves iterators alone when it did not need to reallocate; here, an implementation that avoids a reallocation when
+possible would be an internal optimization only, not a guarantee to rely on.
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__shrink_to_fit.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__shrink_to_fit.output"
+    ```
+
+## See also
+
+- [node_count](node_count.md) - the number of index entries
+- [memory_usage](memory_usage.md) - the number of bytes held by the document
+- [root](root.md) - the view of the root value
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,48 @@
+# <small>nlohmann::basic_json_document::</small>source
+
+```cpp
+view_type::string_view_t source() const noexcept;
+```
+
+Returns the parsed text, whether it is borrowed from the caller or owned by the document.
+
+## Return value
+
+A `#!cpp string_view_t` (`#!cpp std::string_view` on C++17 and newer) over the parsed text, or an empty one if the
+document is [discarded](is_discarded.md).
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+For a borrowed document, `source()` points directly into the caller's buffer, so it is only valid while that buffer
+is; see [`owns_source`](owns_source.md).
+
+## Examples
+
+??? example
+
+    ```cpp
+    --8<-- "examples/basic_json_document__source.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_document__source.output"
+    ```
+
+## See also
+
+- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
+- [source_offset](../basic_json_view/source_offset.md) - byte offset of a value in the source text
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,142 @@
+# <small>nlohmann::basic_json_view::</small>at
+
+```cpp
+// (1)
+basic_json_view at(string_view_t key) const;
+basic_json_view at(const char* key) const;
+basic_json_view at(const string_t& key) const;
+
+// (2)
+basic_json_view at(size_type idx) const;
+template<typename IntegerType>
+basic_json_view at(IntegerType idx) const;
+
+// (3)
+basic_json_view at(const json_pointer& ptr) const;
+```
+
+1. Returns the value of the object member with key `key` -- the first one, should the key occur more than once (see
+   [Notes on duplicate keys](operator[].md#notes)).
+2. Returns the array element at index `idx`. The template accepts every integer type except `#!cpp bool` and
+   `#!cpp std::size_t` and forwards to the `size_type` overload, as for [`operator[]`](operator[].md); a negative
+   `idx` is out of range.
+3. Returns the value a JSON pointer `ptr` refers to, starting at this value.
+
+## Parameters
+
+`key` (in)
+:   object key of the element to access
+
+`idx` (in)
+:   index of the element to access
+
+`ptr` (in)
+:   JSON pointer to the element to access
+
+## Return value
+
+1. the value of the first member with key `key`
+2. the element at index `idx`
+3. the value `ptr` resolves to, starting at this value
+
+## Exception safety
+
+Strong exception safety: if an exception is thrown, there are no changes to the view or the document it refers to.
+
+## Exceptions
+
+1. The function can throw the following exceptions, both with the same message as the corresponding call to
+   [`BasicJsonType::at`](../basic_json/at.md):
+    - Throws [`type_error.304`](../../home/exceptions.md#jsonexceptiontype_error304) if the value is not an object.
+    - Throws [`out_of_range.403`](../../home/exceptions.md#jsonexceptionout_of_range403) if no member has key `key`.
+2. The function can throw the following exceptions, both with the same message as the corresponding call to
+   [`BasicJsonType::at`](../basic_json/at.md):
+    - Throws [`type_error.304`](../../home/exceptions.md#jsonexceptiontype_error304) if the value is not an array.
+    - Throws [`out_of_range.401`](../../home/exceptions.md#jsonexceptionout_of_range401) if `#!cpp idx >= size()`.
+3. The function can throw the following exceptions, all with the same message as the corresponding call to
+   [`BasicJsonType::at`](../basic_json/at.md):
+    - Throws [`parse_error.106`](../../home/exceptions.md#jsonexceptionparse_error106) if an array index in `ptr`
+      begins with `#!cpp '0'`.
+    - Throws [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) if an array index in `ptr` is
+      not a number.
+    - Throws [`out_of_range.401`](../../home/exceptions.md#jsonexceptionout_of_range401) if an array index in `ptr`
+      is out of range.
+    - Throws [`out_of_range.402`](../../home/exceptions.md#jsonexceptionout_of_range402) if a reference token is
+      `#!cpp "-"` at an array -- `at` never inserts an element, so `#!cpp "-"` is always invalid.
+    - Throws [`out_of_range.403`](../../home/exceptions.md#jsonexceptionout_of_range403) if a reference token names
+      an object member that does not exist.
+    - Throws [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) if `ptr` cannot be resolved
+      because a reference token is used on a primitive value.
+
+None of these exceptions carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
+`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
+`JSON_DIAGNOSTICS` enabled.
+
+## Complexity
+
+1. Linear in the number of members: as for [`ordered_json`](../ordered_json.md), members are compared one after
+   another, in document order, stopping at the first match. Each comparison first checks the
+   key's length -- already known from the index, without reading the key bytes -- before comparing its content.
+2. Linear in `idx`: elements are skipped one at a time from the first one, since they are not a fixed size in the
+   index (unlike `BasicJsonType`'s array, which is random-access).
+3. Linear in the number of reference tokens of `ptr` and, for each token, in the number of members of the object at
+   that level (as 1.) or the index into the array (as 2.).
+
+## Notes
+
+!!! warning "Duplicate keys: the first member wins"
+
+    If the source text repeats a key, this resolves to the *first* member with it, not to the last one that
+    [`materialize()`](materialize.md) and `parse()` keep. See the [Notes on duplicate keys](operator[].md#notes) of
+    `operator[]` and [Duplicate keys](../../features/json_view.md#duplicate-keys) for the reasons and for how to get
+    the last value.
+
+Unlike [`operator[]`](operator[].md), which returns a [discarded](is_discarded.md) view for a missing key or an
+out-of-range index, `at` always throws -- exactly as `BasicJsonType::at` does, and with the same messages, so
+existing error handling written against `BasicJsonType::at` keeps working unchanged when switched to a view. This
+also holds for overload 3: unlike [`operator[]`](operator[].md) with a JSON pointer, which returns a discarded view
+for a missing key or an out-of-range index, `at` throws for those too (`out_of_range.403`/`out_of_range.401`).
+
+## Examples
+
+??? example "Example: (1)/(2) access specified element with bounds checking"
+
+    The example below reads required fields out of a service configuration with `at`, and shows that the exceptions
+    it throws -- for a wrong type and for a missing key -- carry the same messages
+    [`BasicJsonType::at`](../basic_json/at.md) would produce for the same JSON text.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__at.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__at.output"
+    ```
+
+??? example "Example: (3) access specified element via JSON pointer with bounds checking"
+
+    The example below shows that `at` with a JSON pointer throws exactly the exceptions, with exactly the messages,
+    that [`BasicJsonType::at`](../basic_json/at.md) throws for the same pointer and the same document.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__at_json_pointer.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__at_json_pointer.output"
+    ```
+
+## See also
+
+- [operator[]](operator[].md) - access specified element (returns a discarded view instead of throwing)
+- [front](front.md), [back](back.md) - access the first or last element
+- [`BasicJsonType::at`](../basic_json/at.md) - the corresponding function of `basic_json`
+- [`json_pointer`](../json_pointer/index.md) - JSON pointer type used by overload 3
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,64 @@
+# <small>nlohmann::basic_json_view::</small>back
+
+```cpp
+basic_json_view back() const;
+```
+
+Returns the last element of an array, the last member value of an object, or the value itself if it is primitive
+(as for [`BasicJsonType::back()`](../basic_json/back.md), a primitive value is a range of one element).
+
+## Return value
+
+The last element or member value. For a primitive value (number, string, boolean), the value itself.
+
+## Exception safety
+
+Strong exception safety: if an exception is thrown, there are no changes to the view or the document it refers to.
+
+## Exceptions
+
+Throws [`invalid_iterator.214`](../../home/exceptions.md#jsonexceptioninvalid_iterator214) if the view is
+[null](is_null.md) or [discarded](is_discarded.md), or if it is an empty array or object.
+
+This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
+`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
+`JSON_DIAGNOSTICS` enabled.
+
+## Complexity
+
+Linear in the size of the array or object: unlike [`front()`](front.md), which only ever looks at the first
+element, `back()` has to walk every element to find where they end, since elements are not a fixed size in the
+index.
+
+## Notes
+
+Unlike [`BasicJsonType::back()`](../basic_json/back.md), which has undefined behavior for an empty array or object,
+`back()` throws `invalid_iterator.214` in that case -- the same way it already does for `#!json null` and for a
+discarded view, where `BasicJsonType::back()` also throws.
+
+## Examples
+
+??? example
+
+    The example below reads only the final status of a build log with `back()`. Even though `back()` is linear in
+    the number of events (unlike [`front()`](front.md), which is constant), it still avoids building a
+    `BasicJsonType` value for the events that are not needed.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__back.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__back.output"
+    ```
+
+## See also
+
+- [front](front.md) - access the first element
+- [`BasicJsonType::back`](../basic_json/back.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,51 @@
+# <small>nlohmann::basic_json_view::</small>basic_json_view
+
+```cpp
+basic_json_view() noexcept = default;
+```
+
+Creates an invalid (discarded) view: [`type()`](type.md) is `#!cpp value_t::discarded` and
+[`is_discarded()`](is_discarded.md) is `#!cpp true`.
+
+This is the only constructor a caller can use directly. Every other view is obtained from a
+[`basic_json_document`](../basic_json_document/index.md), via [`root()`](../basic_json_document/root.md) or by
+navigating into a container with [`operator[]`](operator[].md), [`at`](at.md), [`front`](front.md), [`back`](back.md),
+[`find`](find.md), or iteration.
+
+## Exception safety
+
+No-throw guarantee: this constructor never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+`basic_json_view` is trivially copyable (it holds two pointers), so a default-constructed view can be used as a
+placeholder for "no value yet" and later be assigned a real view.
+
+## Examples
+
+??? example
+
+    The example below shows the default constructor and that a `basic_json_view` is a small, copyable handle.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__basic_json_view.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__basic_json_view.output"
+    ```
+
+## See also
+
+- [is_discarded](is_discarded.md) - return whether the view is invalid
+- [root](../basic_json_document/root.md) - the view of a document's root value
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,61 @@
+# <small>nlohmann::basic_json_view::</small>begin
+
+```cpp
+iterator begin() const noexcept;
+```
+
+Returns an iterator to the first element of an array, or the first member value of an object, in **document order**
+-- the order the values appear in the source text, not sorted by key. A primitive value iterates as a range of one
+element (itself); `#!json null` and a [discarded](is_discarded.md) view iterate as an empty range.
+
+## Return value
+
+Iterator to the first element.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+For an object, iteration visits **every** member, including all occurrences of a duplicate key -- unlike
+[`operator[]`](operator[].md), [`at`](at.md), [`find`](find.md), [`contains`](contains.md), and [`count`](count.md),
+which all resolve to the *first* member with a given key. See the
+[Notes on duplicate keys](operator[].md#notes) of `operator[]`.
+
+Because objects are iterated in document order rather than sorted by key, the order seen here can differ from what
+iterating the [`materialize()`](materialize.md)d `BasicJsonType` value would produce: a `#!cpp basic_json` object
+(`std::map`-backed by default) sorts its keys, while a view does not.
+
+## Examples
+
+??? example
+
+    The example below iterates a log record's members with `begin()`/[`end()`](end.md) and prints them in the order
+    they were written. Materializing the record into a `BasicJsonType` object and iterating that would instead print
+    the members sorted by key.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__begin.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__begin.output"
+    ```
+
+## See also
+
+- [end](end.md) - returns an iterator to one past the last element
+- [cbegin](cbegin.md) - returns a const iterator to the first element
+- [items](items.md) - access iterator member functions in range-based for
+- [`BasicJsonType::begin`](../basic_json/begin.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,49 @@
+# <small>nlohmann::basic_json_view::</small>cbegin
+
+```cpp
+iterator cbegin() const noexcept;
+```
+
+Returns an iterator to the first element, in [document order](begin.md). Equivalent to [`begin()`](begin.md): a view
+is always read-only, so `#!cpp const_iterator` and `#!cpp iterator` are the same type, and `cbegin()` exists only so
+that generic code that expects a `cbegin()`/`cend()` pair works with a view too.
+
+## Return value
+
+Iterator to the first element; identical to what [`begin()`](begin.md) returns.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Examples
+
+??? example
+
+    The example below sums many measurements with `std::accumulate`, using `cbegin()`/[`cend()`](cend.md) as the
+    range -- the same way it would for any standard container -- without ever materializing the whole array into a
+    `BasicJsonType` value.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__cbegin.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__cbegin.output"
+    ```
+
+## See also
+
+- [begin](begin.md) - returns an iterator to the first element
+- [cend](cend.md) - returns a const iterator to one past the last element
+- [`BasicJsonType::cbegin`](../basic_json/cbegin.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,49 @@
+# <small>nlohmann::basic_json_view::</small>cend
+
+```cpp
+iterator cend() const noexcept;
+```
+
+Returns an iterator to one past the last element, in [document order](begin.md). Equivalent to [`end()`](end.md): a
+view is always read-only, so `#!cpp const_iterator` and `#!cpp iterator` are the same type, and `cend()` exists only
+so that generic code that expects a `cbegin()`/`cend()` pair works with a view too.
+
+## Return value
+
+Iterator one past the last element; identical to what [`end()`](end.md) returns.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Examples
+
+??? example
+
+    The example below checks that every record of a batch is an object with `std::all_of`, using
+    [`cbegin()`](cbegin.md)/`cend()` as the range -- the same way it would for any standard container -- before
+    materializing any record of the batch.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__cend.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__cend.output"
+    ```
+
+## See also
+
+- [end](end.md) - returns an iterator to one past the last element
+- [cbegin](cbegin.md) - returns a const iterator to the first element
+- [`BasicJsonType::cend`](../basic_json/cend.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,108 @@
+# <small>nlohmann::basic_json_view::</small>contains
+
+```cpp
+// (1)
+bool contains(string_view_t key) const;
+bool contains(const char* key) const;
+bool contains(const string_t& key) const;
+
+// (2)
+bool contains(const json_pointer& ptr) const;
+```
+
+1. Checks whether the value is an object with a member with key `key`.
+2. Checks whether a JSON pointer `ptr` can be resolved, starting at this value.
+
+## Parameters
+
+`key` (in)
+:   key value to check its existence
+
+`ptr` (in)
+:   JSON pointer to check its existence
+
+## Return value
+
+1. `#!cpp true` if the value is an object and has a member with key `key`, `#!cpp false` otherwise
+2. `#!cpp true` if `ptr` can be resolved to a value starting at this view, `#!cpp false` otherwise
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+1. Linear in the number of members: as for [`ordered_json`](../ordered_json.md), members are compared one after
+   another, in document order, stopping at the first match. Each comparison first checks the
+   key's length -- already known from the index, without reading the key bytes -- before comparing its content.
+2. Linear in the number of reference tokens of `ptr` and, for each token, in the number of members of the object at
+   that level or the index into the array -- as for [`operator[]`](operator[].md#complexity) and
+   [`at`](at.md#complexity) with a JSON pointer.
+
+## Notes
+
+!!! warning "Duplicate keys: the first member wins"
+
+    If the source text repeats a key, this resolves to the *first* member with it, not to the last one that
+    [`materialize()`](materialize.md) and `parse()` keep. See the [Notes on duplicate keys](operator[].md#notes) of
+    `operator[]` and [Duplicate keys](../../features/json_view.md#duplicate-keys) for the reasons and for how to get
+    the last value.
+
+Overload 1 always returns `#!cpp false` when the value is not an object -- including a [discarded](is_discarded.md)
+view.
+
+!!! info "Postconditions"
+
+    If `#!cpp v.contains(key)` returns `#!cpp true`, then `#!cpp v[key]` is not [discarded](is_discarded.md). If
+    `#!cpp v.contains(ptr)` returns `#!cpp true`, then `#!cpp v[ptr]` is not discarded and `#!cpp v.at(ptr)` does not
+    throw.
+
+!!! info "Overload 2 never throws"
+
+    Unlike [`BasicJsonType::contains(const json_pointer&)`](../basic_json/contains.md), which can throw for certain
+    malformed pointers (for instance an empty array-index reference token), overload 2 never throws: a missing key,
+    an out-of-range or malformed array index, a `#!cpp "-"` index, or a reference token used on a primitive all
+    simply make it return `#!cpp false`.
+
+## Examples
+
+??? example "Example: (1) check with key"
+
+    The example below counts how many of a batch of records carry an optional `retry_of` field, using `contains()`
+    to check without ever materializing a single record of the batch.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__contains.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__contains.output"
+    ```
+
+??? example "Example: (2) check with JSON pointer"
+
+    The example below checks an optional, nested field with a JSON pointer, and shows two pointers that
+    `#!cpp contains()` resolves to `#!cpp false` without throwing.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__contains_json_pointer.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__contains_json_pointer.output"
+    ```
+
+## See also
+
+- [find](find.md) - find a value in an object
+- [count](count.md) - returns the number of occurrences of a key
+- [at](at.md), [operator[]](operator[].md) - resolve a JSON pointer and throw, or return a discarded view
+- [`BasicJsonType::contains`](../basic_json/contains.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,73 @@
+# <small>nlohmann::basic_json_view::</small>count
+
+```cpp
+size_type count(string_view_t key) const;
+size_type count(const char* key) const;
+size_type count(const string_t& key) const;
+```
+
+Returns `#!cpp 1` if the value is an object with a member with key `key`, `#!cpp 0` otherwise.
+
+## Parameters
+
+`key` (in)
+:   key value of the element to count
+
+## Return value
+
+`#!cpp 1` if the value is an object and has a member with key `key`, `#!cpp 0` otherwise.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Linear in the number of members: as for [`ordered_json`](../ordered_json.md), members are compared one after another,
+in document order, stopping at the first match. Each comparison first checks the key's length
+-- already known from the index, without reading the key bytes -- before comparing its content.
+
+## Notes
+
+!!! warning "Duplicate keys: the first member wins"
+
+    If the source text repeats a key, this resolves to the *first* member with it, not to the last one that
+    [`materialize()`](materialize.md) and `parse()` keep. See the [Notes on duplicate keys](operator[].md#notes) of
+    `operator[]` and [Duplicate keys](../../features/json_view.md#duplicate-keys) for the reasons and for how to get
+    the last value.
+
+This method always returns `#!cpp 0` when the value is not an object -- including a [discarded](is_discarded.md)
+view.
+
+Unlike [`BasicJsonType::count()`](../basic_json/count.md), whose return value can in principle exceed `#!cpp 1` for
+an `ObjectType` that allows multiple entries per key, `count()` here never does: it is exactly
+[`contains()`](contains.md) as `#!cpp 0`/`#!cpp 1`. This holds even if the source text has a duplicate key -- see the
+[Notes on duplicate keys](operator[].md#notes) of `operator[]` -- because a `#!cpp count() > 1` result would require
+counting every member with a matching key (the lookup functions resolve to the *first* one).
+
+## Examples
+
+??? example
+
+    The example below validates that every transaction of a batch carries a mandatory `amount` field, using
+    `count()` before deciding whether to materialize a transaction at all.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__count.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__count.output"
+    ```
+
+## See also
+
+- [find](find.md) - find a value in an object
+- [contains](contains.md) - checks whether a key exists
+- [`BasicJsonType::count`](../basic_json/count.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,61 @@
+# <small>nlohmann::basic_json_view::</small>empty
+
+```cpp
+bool empty() const noexcept;
+```
+
+Checks whether [`size()`](size.md) is `0`, as [`BasicJsonType::empty()`](../basic_json/empty.md) would for the same
+value.
+
+## Return value
+
+The return value depends on the type and is defined as follows:
+
+| Value type          | return value    |
+|----------------------|-----------------|
+| null                  | `#!cpp true`     |
+| discarded             | `#!cpp true`     |
+| boolean               | `#!cpp false`    |
+| string                | `#!cpp false`    |
+| number                | `#!cpp false`    |
+| object                | `#!cpp object_t::empty()` |
+| array                 | `#!cpp array_t::empty()`  |
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+As for [`BasicJsonType::empty()`](../basic_json/empty.md), this does not return whether a string value is empty -- it
+is `#!cpp false` for any string, regardless of its length.
+
+## Examples
+
+??? example
+
+    The example below uses [`size()`](size.md) and `empty()` to decide whether a parsed message is worth acting on,
+    without materializing it into a `BasicJsonType` value.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__size_empty.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__size_empty.output"
+    ```
+
+## See also
+
+- [size](size.md) - return the number of elements
+- [`BasicJsonType::empty`](../basic_json/empty.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,54 @@
+# <small>nlohmann::basic_json_view::</small>end
+
+```cpp
+iterator end() const noexcept;
+```
+
+Returns an iterator to one past the last element of an array, one past the last member value of an object, in
+**document order** -- see [`begin()`](begin.md). A primitive value iterates as a range of one element (itself);
+`#!json null` and a [discarded](is_discarded.md) view iterate as an empty range, so `#!cpp begin() == end()` for
+them.
+
+## Return value
+
+Iterator one past the last element.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+`#!cpp iterator` is a forward iterator: unlike `BasicJsonType::iterator`, it cannot be decremented, so there is no
+way to reach the last element by stepping back from `end()`. Use [`back()`](back.md) instead.
+
+## Examples
+
+??? example
+
+    The example below scans a (possibly large) array of readings for the first one over a threshold, stopping the
+    loop at `end()` as soon as one is found. Only the matching reading, if any, is ever materialized.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__end.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__end.output"
+    ```
+
+## See also
+
+- [begin](begin.md) - returns an iterator to the first element
+- [cend](cend.md) - returns a const iterator to one past the last element
+- [`BasicJsonType::end`](../basic_json/end.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,70 @@
+# <small>nlohmann::basic_json_view::</small>find
+
+```cpp
+iterator find(string_view_t key) const;
+iterator find(const char* key) const;
+iterator find(const string_t& key) const;
+```
+
+Finds a member with key `key` -- the first one, should the key occur more than once (see
+[Notes on duplicate keys](operator[].md#notes)). If the value is not an object, or no member has this key,
+[`end()`](end.md) is returned.
+
+## Parameters
+
+`key` (in)
+:   key value of the element to search for
+
+## Return value
+
+An iterator to the member with key `key`, or [`end()`](end.md) if there is none or the value is not an object.
+
+## Exception safety
+
+No-throw guarantee: this function never throws exceptions.
+
+## Complexity
+
+Linear in the number of members: as for [`ordered_json`](../ordered_json.md), members are compared one after another,
+in document order, stopping at the first match. Each comparison first checks the key's length
+-- already known from the index, without reading the key bytes -- before comparing its content.
+
+## Notes
+
+!!! warning "Duplicate keys: the first member wins"
+
+    If the source text repeats a key, this resolves to the *first* member with it, not to the last one that
+    [`materialize()`](materialize.md) and `parse()` keep. See the [Notes on duplicate keys](operator[].md#notes) of
+    `operator[]` and [Duplicate keys](../../features/json_view.md#duplicate-keys) for the reasons and for how to get
+    the last value.
+
+Unlike [`BasicJsonType::find`](../basic_json/find.md), which always returns `#!cpp end()` for a non-object type, this
+also does so for a [discarded](is_discarded.md) view -- there is no separate "invalid" iterator to return.
+
+## Examples
+
+??? example
+
+    The example below scans a batch of events for those that carry an optional `user_id` field, using `find()`
+    instead of [`operator[]`](operator[].md) (which would throw for the events that are not objects at all) or
+    [`contains()`](contains.md) followed by a second lookup. Events without a match are never materialized.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__find.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__find.output"
+    ```
+
+## See also
+
+- [count](count.md) - returns the number of occurrences of a key
+- [contains](contains.md) - checks whether a key exists
+- [`BasicJsonType::find`](../basic_json/find.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.
@@ -0,0 +1,61 @@
+# <small>nlohmann::basic_json_view::</small>front
+
+```cpp
+basic_json_view front() const;
+```
+
+Returns the first element of an array, the first member value of an object, or the value itself if it is primitive
+(as for [`BasicJsonType::front()`](../basic_json/front.md), a primitive value is a range of one element).
+
+## Return value
+
+The first element or member value. For a primitive value (number, string, boolean), the value itself.
+
+## Exception safety
+
+Strong exception safety: if an exception is thrown, there are no changes to the view or the document it refers to.
+
+## Exceptions
+
+Throws [`invalid_iterator.214`](../../home/exceptions.md#jsonexceptioninvalid_iterator214) if the view is
+[null](is_null.md) or [discarded](is_discarded.md), or if it is an empty array or object.
+
+This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
+`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
+`JSON_DIAGNOSTICS` enabled.
+
+## Complexity
+
+Constant.
+
+## Notes
+
+Unlike [`BasicJsonType::front()`](../basic_json/front.md), which has undefined behavior for an empty array or
+object, `front()` throws `invalid_iterator.214` in that case -- the same way it already does for `#!json null` and
+for a discarded view, where `BasicJsonType::front()` also throws.
+
+## Examples
+
+??? example
+
+    The example below reads only the earliest entry of a build log with `front()`, without materializing the rest
+    of the (possibly long) log.
+
+    ```cpp
+    --8<-- "examples/basic_json_view__front.cpp"
+    ```
+
+    Output:
+
+    ```json
+    --8<-- "examples/basic_json_view__front.output"
+    ```
+
+## See also
+
+- [back](back.md) - access the last element
+- [`BasicJsonType::front`](../basic_json/front.md) - the corresponding function of `basic_json`
+
+## Version history
+
+- Added in version 3.13.0.