Regenerate the amalgamated headers

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Move the dump tests of this branch to unit-json_view_dump.cpp
2026-10-27 12:25:20 +00:00 · 2026-10-17 08:32:12 +02:00 · 2026-10-17 08:32:11 +02:00 · 2026-10-17 08:32:10 +02:00 · 2026-10-17 08:32:10 +02:00 · 2026-10-17 08:32:09 +02:00
975 changed files with 43937 additions and 51897 deletions
@@ -1,33 +1,3 @@
-# Style or vendor rule sets that do not fit a header-only library:
-#   altera-*, fuchsia-*, llvmlibc-*, android-cloexec-fopen, boost-use-ranges, llvm-header-guard,
-#   llvm-include-order, llvm-prefer-static-over-anonymous-namespace, llvm-use-ranges,
-#   misc-use-anonymous-namespace, google-runtime-float, google-runtime-int, hicpp-signed-bitwise,
-#   bugprone-signed-bitwise, hicpp-explicit-conversions, google-explicit-constructor,
-#   cppcoreguidelines-explicit-constructor, misc-explicit-constructor (implicit conversions are the
-#   API), readability-trailing-comma,
-#   hicpp-avoid-goto / cppcoreguidelines-avoid-goto, hicpp-no-array-decay,
-#   hicpp-uppercase-literal-suffix, readability-uppercase-literal-suffix, modernize-use-trailing-return-type.
-# Constructs the library needs on purpose (the library supports C++11 and legacy compilers):
-#   cppcoreguidelines-macro-usage, cppcoreguidelines-avoid-do-while (macros),
-#   cppcoreguidelines-pro-bounds-*, cppcoreguidelines-pro-type-reinterpret-cast,
-#   cppcoreguidelines-pro-type-union-access (parsers, serializers, basic_json's value union),
-#   cppcoreguidelines-avoid-const-or-ref-data-members, cppcoreguidelines-rvalue-reference-param-not-moved,
-#   cppcoreguidelines-avoid-non-const-global-variables, misc-non-private-member-variables-in-classes,
-#   misc-no-recursion (value walks are recursive, bounded by detail::recursion_depth_limit()),
-#   modernize-type-traits, modernize-use-constraints, modernize-use-ranges, modernize-use-std-numbers,
-#   modernize-use-designated-initializers, modernize-use-nodiscard, modernize-concat-nested-namespaces,
-#   readability-redundant-typename, readability-redundant-parentheses,
-#   readability-redundant-access-specifiers, readability-simplify-boolean-expr,
-#   readability-use-concise-preprocessor-directives, modernize-use-string-view,
-#   modernize-use-integer-sign-comparison (needs std::cmp_less; the flagged
-#   static_cast<std::size_t>(end - pos) < n comparisons are deliberate)
-#   (all need a newer standard or compiler than C++11, or would change macro-generated or
-#   deliberately explicit code).
-# Too noisy to be useful (numeric parsing/formatting code, doctest, tests):
-#   bugprone-easily-swappable-parameters, cppcoreguidelines-avoid-magic-numbers, readability-magic-numbers,
-#   readability-identifier-length, readability-function-cognitive-complexity, performance-enum-size,
-#   concurrency-mt-unsafe, misc-confusable-identifiers, misc-include-cleaner (run on its own for
-#   the consumer headers in cmake/ci.cmake).
 # portability-avoid-pragma-once: kept disabled on purpose. #pragma once is accepted
 # by every supported compiler, and tools/amalgamate/amalgamate.py strips it from
 # single_include, so there is nothing left to fix here.
@@ -40,14 +10,14 @@ Checks: '*,
         -android-cloexec-fopen,
         -boost-use-ranges,
         -bugprone-easily-swappable-parameters,
-         -bugprone-signed-bitwise,
+         -cert-err58-cpp,
+         -clang-analyzer-webkit.NoUncountedMemberChecker,
         -concurrency-mt-unsafe,
         -cppcoreguidelines-avoid-const-or-ref-data-members,
         -cppcoreguidelines-avoid-do-while,
         -cppcoreguidelines-avoid-goto,
         -cppcoreguidelines-avoid-magic-numbers,
         -cppcoreguidelines-avoid-non-const-global-variables,
-         -cppcoreguidelines-explicit-constructor,
         -cppcoreguidelines-macro-usage,
         -cppcoreguidelines-pro-bounds-avoid-unchecked-container-access,
         -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
@@ -56,15 +26,19 @@ Checks: '*,
         -cppcoreguidelines-pro-type-reinterpret-cast,
         -cppcoreguidelines-pro-type-union-access,
         -cppcoreguidelines-rvalue-reference-param-not-moved,
+         -cppcoreguidelines-virtual-class-destructor,
         -fuchsia-default-arguments-calls,
         -fuchsia-default-arguments-declarations,
         -fuchsia-overloaded-operator,
         -google-explicit-constructor,
+         -google-readability-function-size,
         -google-runtime-float,
         -google-runtime-int,
         -hicpp-avoid-goto,
         -hicpp-explicit-conversions,
+         -hicpp-function-size,
         -hicpp-no-array-decay,
+         -hicpp-no-assembler,
         -hicpp-signed-bitwise,
         -hicpp-uppercase-literal-suffix,
         -llvm-header-guard,
@@ -74,7 +48,6 @@ Checks: '*,
         -llvmlibc-*,
         -misc-use-anonymous-namespace,
         -misc-confusable-identifiers,
-         -misc-explicit-constructor,
         -misc-include-cleaner,
         -misc-no-recursion,
         -misc-non-private-member-variables-in-classes,
@@ -82,22 +55,20 @@ Checks: '*,
         -modernize-type-traits,
         -modernize-use-constraints,
         -modernize-use-designated-initializers,
-         -modernize-use-integer-sign-comparison,
         -modernize-use-nodiscard,
         -modernize-use-ranges,
-         -modernize-use-string-view,
         -modernize-use-std-numbers,
         -modernize-use-trailing-return-type,
         -performance-enum-size,
         -portability-avoid-pragma-once,
         -readability-function-cognitive-complexity,
+         -readability-function-size,
         -readability-identifier-length,
         -readability-magic-numbers,
         -readability-redundant-access-specifiers,
         -readability-redundant-parentheses,
         -readability-redundant-typename,
         -readability-simplify-boolean-expr,
-         -readability-trailing-comma,
         -readability-uppercase-literal-suffix,
         -readability-use-concise-preprocessor-directives'

@@ -18,8 +18,7 @@ environment:
  matrix:
    # The Visual Studio 2017 jobs compile everything with /std:c++17, so they
    # only build the C++17 variant of each test, split into two jobs each to
-    # stay below AppVeyor's 60-minute limit per job. The Visual Studio 2019
-    # job builds the tests for all standards and is split for the same reason.
+    # stay below AppVeyor's 60-minute limit per job.
    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
      configuration: Debug
      platform: x86
@@ -51,13 +50,7 @@ environment:
      configuration: Release
      platform: x86
      CXX_FLAGS: "/W4 /WX"
-      CMAKE_OPTIONS: "-DJSON_ImplicitConversions=OFF -DJSON_TestShard=0/2"
-      GENERATOR: Visual Studio 16 2019
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
-      configuration: Release
-      platform: x86
-      CXX_FLAGS: "/W4 /WX"
-      CMAKE_OPTIONS: "-DJSON_ImplicitConversions=OFF -DJSON_TestShard=1/2"
+      CMAKE_OPTIONS: "-DJSON_ImplicitConversions=OFF"
      GENERATOR: Visual Studio 16 2019

    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
@@ -64,7 +64,6 @@ labels:
    - "tests/src/unit-json_view.*"
    - "tests/src/json_view_test_helpers\\.hpp"
    - "tests/src/fuzzer-(parse_json_view|json_view_image)\\.cpp"
-    - "tests/benchmarks/json_view/.*"
    - "tools/amalgamate/config_json_view\\.json"
    - "docs/mkdocs/docs/features/json_view\\.md"
    - "docs/mkdocs/docs/api/basic_json_(document|view)/.*"
@@ -37,7 +37,7 @@ jobs:
          path: pr/

  check:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    env:
      MAIN_DIR: ${{ github.workspace }}/main
      INCLUDE_DIR: ${{ github.workspace }}/main/single_include/nlohmann
@@ -77,12 +77,13 @@ jobs:
          cd $MAIN_DIR

          # Built from this PR's own tools/macro_builder/main.cpp, not a
-          # develop checkout: unlike amalgamate.py, this tool has no other
-          # source of truth to check against (its own README documents that
-          # it must reproduce macro_scope.hpp 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.
+          # develop checkout: unlike amalgamate.py and generate_natvis.py,
+          # this tool has no other source of truth to check against (its
+          # own README documents that it must reproduce macro_scope.hpp
+          # 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.
          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"
@@ -145,36 +146,14 @@ jobs:
      - name: Regenerate nlohmann_json.natvis
        run: |
          cd $MAIN_DIR
-          # The generator and its template are what this check verifies the
-          # committed natvis file against (which namespaces it lists, and
-          # what each entry looks like), so run this PR's copy rather than
-          # the develop checkout's: with develop's, a PR that changes either
-          # could never pass. generate_natvis.py loads the template from its
-          # own directory. Like the macro_builder step above, this only runs
-          # PR content in a job without credentials.
-          python3 tools/generate_natvis/generate_natvis.py $MAIN_DIR
-
-      - name: Check the nlohmann_json.natvis generator options
-        run: |
-          cd $MAIN_DIR
-          # The options for configurations outside the checked-in file write
-          # to a temporary file, so they do not affect the diff below.
-          GENERATOR=tools/generate_natvis/generate_natvis.py
-          python3 $GENERATOR --list-tags
-          TAG_COUNT=$(python3 $GENERATOR --list-tags | wc -l)
-
-          python3 $GENERATOR --abi-tags diag,_dp,_ns --abi-tags _diag --output $RUNNER_TEMP/abi_tags.natvis
-          grep -q '<!-- Namespace nlohmann::json_abi_diag_dp_ns -->' $RUNNER_TEMP/abi_tags.natvis
-          grep -q '<!-- Namespace nlohmann::json_abi_diag_dp_ns_v[0-9_]* -->' $RUNNER_TEMP/abi_tags.natvis
-          test $(grep -c '<!-- Namespace ' $RUNNER_TEMP/abi_tags.natvis) -eq $(( $(grep -c '<!-- Namespace ' nlohmann_json.natvis) + 2 ))
-
-          python3 $GENERATOR --all --output $RUNNER_TEMP/all.natvis
-          test $(grep -c '<!-- Namespace ' $RUNNER_TEMP/all.natvis) -eq $(( (1 << TAG_COUNT) * 2 + 1 ))
-
-          if python3 $GENERATOR --abi-tags _unknown --output $RUNNER_TEMP/unknown.natvis; then
-            echo "generate_natvis.py accepted an unknown ABI tag"
-            exit 1
-          fi
+          # 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
+          # own directory, and with develop's copy a PR that changes the
+          # template could never pass. Like the macro_builder step above,
+          # this only renders PR content in a job without credentials.
+          cp tools/generate_natvis/nlohmann_json.natvis.j2 $NATVIS_TOOL_DIR/
+          python3 $NATVIS_TOOL_DIR/generate_natvis.py $MAIN_DIR

      - name: Build patch and check for differences
        id: diff
@@ -21,7 +21,7 @@ permissions:
 jobs:
  CodeQL-Build:

-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    permissions:
      security-events: write

@@ -38,14 +38,14 @@ jobs:

    # Initializes the CodeQL tools for scanning.
    - name: Initialize CodeQL
-      uses: github/codeql-action/init@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+      uses: github/codeql-action/init@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
      with:
        languages: c-cpp

    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
    # If this step fails, then you should remove it and run the build manually (see below)
    - name: Autobuild
-      uses: github/codeql-action/autobuild@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+      uses: github/codeql-action/autobuild@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3

    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+      uses: github/codeql-action/analyze@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
@@ -37,14 +37,6 @@ jobs:
            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "pr"
            })[0];
-            // a run that failed before its jobs started (e.g. a stale queued
-            // run cancelled long after its push) has no artifact to report on
-            if (!matchArtifact) {
-              core.notice('Run ${{ github.event.workflow_run.id }} has no "pr" artifact; nothing to comment on.');
-              core.setOutput('found', 'false');
-              return;
-            }
-            core.setOutput('found', 'true');
            var download = await github.rest.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
@@ -59,11 +51,9 @@ jobs:
      # Extract the untrusted PR artifact into a dedicated empty directory and
      # read only the two expected files by fixed path afterwards. This avoids a
      # malicious archive overwriting workspace files or escaping via ../ paths.
-      - if: steps.download.outputs.found == 'true'
-        run: unzip -o pr.zip -d ./pr_artifact
+      - run: unzip -o pr.zip -d ./pr_artifact

      - name: 'Comment on PR'
-        if: steps.download.outputs.found == 'true'
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -43,11 +43,10 @@ jobs:
      - name: flawfinder_scan
        uses: david-a-wheeler/flawfinder@c4216b74cf2639ffa98503768bd6e4299b5440c9 # v2.0.20
        with:
-          # single_include/ is generated from include/ and would report every finding twice
-          arguments: "--sarif --exclude '*/single_include/*' ./"
+          arguments: '--sarif ./'
          output: 'flawfinder_results.sarif'

      - name: Upload analysis results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+        uses: github/codeql-action/upload-sarif@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
        with:
          sarif_file: ${{github.workspace}}/flawfinder_results.sarif
@@ -1,84 +0,0 @@
-name: "json_view benchmarks"
-
-# On demand only: runs the comparison of json_view with yyjson, simdjson, and
-# Boost.JSON (tests/benchmarks/json_view/compare.py) on GitHub-hosted runners,
-# for numbers from x86-64 and AArch64 Linux. It runs when started by hand, or
-# when a pull request gets the label "benchmark" (on both architectures, with
-# GCC and the default settings). Shared runners are noisy: the results show
-# where json_view stands, but published numbers need a quiet machine (see
-# tests/benchmarks/json_view/README.md).
-
-on:
-  pull_request:
-    types: [labeled]
-  workflow_dispatch:
-    inputs:
-      runner:
-        description: "Runner image"
-        type: choice
-        options:
-          - ubuntu-24.04
-          - ubuntu-24.04-arm
-        default: ubuntu-24.04
-      compiler:
-        description: "Compiler"
-        type: choice
-        options:
-          - g++
-          - clang++
-        default: g++
-      native:
-        description: "Compile for the runner's CPU (-march=native)"
-        type: boolean
-        default: false
-      rounds:
-        description: "Rounds of bench_view"
-        type: number
-        default: 30
-
-permissions:
-  contents: read
-
-concurrency:
-  # (the label is part of the group: adding an unrelated label must not cancel a running benchmark)
-  group: json-view-benchmarks-${{ github.workflow }}-${{ github.ref }}-${{ github.event.label.name }}
-  cancel-in-progress: true
-
-jobs:
-  compare:
-    if: github.event_name == 'workflow_dispatch' || github.event.label.name == 'benchmark'
-    strategy:
-      matrix:
-        runner: ${{ fromJSON(github.event_name == 'workflow_dispatch' && format('["{0}"]', inputs.runner) || '["ubuntu-24.04", "ubuntu-24.04-arm"]') }}
-    runs-on: ${{ matrix.runner }}
-    timeout-minutes: 60
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
-        with:
-          egress-policy: audit
-
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-
-      - name: Download test data
-        run: |
-          cmake -S . -B build -DJSON_BuildTests=On
-          cmake --build build --target download_test_data
-
-      - name: Run the comparison
-        env:
-          CXX: ${{ inputs.compiler || 'g++' }}
-          CC: ${{ inputs.compiler == 'clang++' && 'clang' || 'gcc' }}
-          ROUNDS: ${{ inputs.rounds || 30 }}
-          NATIVE: ${{ inputs.native && '--native' || '' }}
-        run: python3 tests/benchmarks/json_view/compare.py --data build/test_files --download --rounds "$ROUNDS" $NATIVE
-
-      - name: Summary
-        run: cat tests/benchmarks/json_view/results/*.md >> "$GITHUB_STEP_SUMMARY"
-
-      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
-        with:
-          name: json_view-benchmarks-${{ matrix.runner }}-${{ inputs.compiler || 'g++' }}
-          path: tests/benchmarks/json_view/results/
@@ -50,7 +50,7 @@ jobs:
          persist-credentials: false

      - name: "Run analysis"
-        uses: ossf/scorecard-action@fa7117db83c52d787ae5a89f350999701505d78e # v2.5.0
+        uses: ossf/scorecard-action@2d1146689b8cda280b9bc96326124645441f03bc # v2.4.4
        with:
          results_file: results.sarif
          results_format: sarif
@@ -80,6 +80,6 @@ jobs:

      # Upload the results to GitHub's code scanning dashboard.
      - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+        uses: github/codeql-action/upload-sarif@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
        with:
          sarif_file: results.sarif
@@ -33,7 +33,7 @@ jobs:
      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
      actions: read # only required for a private repository by github/codeql-action/upload-sarif to get the Action run status
    name: Scan
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
@@ -65,7 +65,7 @@ jobs:

      # Upload SARIF file generated in previous step
      - name: Upload SARIF file
-        uses: github/codeql-action/upload-sarif@6f2ac81f5cd81fe351a197ba0b00d91d03cd2aee # v4.39.0
+        uses: github/codeql-action/upload-sarif@24c54180a607b1449ed407dd24f251e4e9147c8d # v4.38.3
        with:
          sarif_file: semgrep.sarif
        if: always()
@@ -32,7 +32,7 @@ jobs:
        run: cmake --build build --target ci_test_gcc

  ci_meson_install:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
@@ -77,7 +77,7 @@ jobs:
          cmake --build build-import-split

  ci_infer:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
@@ -106,7 +106,7 @@ jobs:
          if-no-files-found: ignore

  ci_static_analysis_ubuntu:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    strategy:
      matrix:
        target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
@@ -175,7 +175,7 @@ jobs:
        run: cmake --build build --target ${{ matrix.target }}

  ci_test_coverage:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
@@ -430,7 +430,7 @@ jobs:
        run: cmake --build build --target ci_nvhpc

  ci_emscripten:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@ccd8616d44fd3846e67624a50d5aad6d37bf2d25 # v2.22.1
@@ -450,7 +450,7 @@ jobs:
        run: cmake --build build

  ci_test_documentation:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-latest
    strategy:
      matrix:
        target: [ci_test_examples, ci_test_build_documentation, ci_test_documentation_mermaid]
@@ -1,7 +1,6 @@
 {
  "_comment": "Used by the ci_infer CMake target (#5715 item 4b). fail-on-issue makes CI fail on Infer findings; disable-issue-type is a type-level baseline for the ~174 pre-existing findings (all PULSE_UNNECESSARY_COPY*/PULSE_RESOURCE_LEAK/PULSE_CONST_REFABLE, mostly in test code) triaged in run https://github.com/nlohmann/json/actions/runs/35829411620 on commit 1054b2097, so CI fails only on a NEW issue type. Remove an entry here once its findings have been fixed or explicitly accepted.",
  "_comment_pulse": "Pulse stops exploring paths after pulse-max-disjuncts (default 20). With the default, basic_json::replace_value() (destroy + assert_invariant) exceeds the limit, Pulse loses the stored type, and reports false NULLPTR_DEREFERENCE findings for get_ptr() results in tests/src/unit-pointer_access.cpp.",
-  "_comment_view": "Infer's model of std::unique_ptr mixes up values that are returned by value and own one: basic_json_document (parse() results) and the `built` values of the build() helper in tests/src/unit-json_view_builder.cpp. It reports USE_AFTER_DELETE for one of them after the destructor of an unrelated object (e.g. ~built() on line 345 invalidating `shallow` on line 350 of that file, or two documents parsed in one lambda in tests/src/unit-json_view_dump.cpp). AddressSanitizer and Valgrind are clean on the same tests, so reports for the json_view test files are excluded; findings reported in the library headers are still reported.",
  "pulse-max-disjuncts": 40,
  "fail-on-issue": true,
  "disable-issue-type": [
@@ -11,8 +10,5 @@
    "PULSE_UNNECESSARY_COPY_OPTIONAL",
    "PULSE_RESOURCE_LEAK",
    "PULSE_CONST_REFABLE"
-  ],
-  "report-block-list-path-regex": [
-    "tests/src/unit-json_view.*\\.cpp"
  ]
 }
@@ -37,7 +37,6 @@ cc_library(
        "include/nlohmann/detail/input/parser.hpp",
        "include/nlohmann/detail/input/position_t.hpp",
        "include/nlohmann/detail/input/pow5_table.hpp",
-        "include/nlohmann/detail/input/simd_scan.hpp",
        "include/nlohmann/detail/input/string_scan.hpp",
        "include/nlohmann/detail/iterators/internal_iterator.hpp",
        "include/nlohmann/detail/iterators/iter_impl.hpp",
@@ -90,7 +89,6 @@ cc_library(
        "include/nlohmann/detail/view/simd.hpp",
        "include/nlohmann/detail/view/string_ref.hpp",
        "include/nlohmann/detail/view/value.hpp",
-        "include/nlohmann/detail/view/view_mode.hpp",
        "include/nlohmann/json.hpp",
        "include/nlohmann/json_fwd.hpp",
        "include/nlohmann/json_literals.hpp",
@@ -6,7 +6,6 @@ This file describes the source for supporting files; that is, files that are not
 - [GitHub](#github)
 - [REUSE](#reuse)
 - [Package Managers](#package-managers)
- [Debugging](#debugging)

 ## Continuous Integration

@@ -290,29 +289,3 @@ The module definition for [Bazel](https://bazel.build)'s [Bzlmod](https://bazel.
 Further documentation:

 - [Bazel modules](https://bazel.build/external/module)
-
-## Debugging
-
-### `nlohmann_json.natvis`
-
-The [Natvis](https://learn.microsoft.com/en-us/visualstudio/debugger/create-custom-views-of-native-objects) file that
-gives `json` values a friendly view in the Visual Studio debugger. The file is generated by
-`tools/generate_natvis/generate_natvis.py` from the template `tools/generate_natvis/nlohmann_json.natvis.j2` and the ABI
-tags and version in `include/nlohmann/detail/abi_macros.hpp`; change the script or the template rather than editing
-the file by hand. The file can be updated by calling
-
-```shell
-make natvis
-```
-
-The "Check amalgamation" workflow fails if the file is out of date.
-
-The file covers the namespace variants with up to two ABI tags. A Natvis file for other configurations can be
-generated with the `--abi-tags` or `--all` options, for example
-`make natvis NATVIS_ARGS="--abi-tags _diag,_dp,_ns --output my_nlohmann_json.natvis"`; see
-[`tools/generate_natvis`](tools/generate_natvis/README.md). With MSVC, CMake adds the file to the `nlohmann_json`
-target and installs it.
-
-Further documentation:
-
- [Create custom views of C++ objects in the debugger using the Natvis framework](https://learn.microsoft.com/en-us/visualstudio/debugger/create-custom-views-of-native-objects)
@@ -46,7 +46,7 @@ all:
 	@echo "clean - remove built files"
 	@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 (pass generator options via NATVIS_ARGS, see tools/generate_natvis/README.md)"
+	@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)"
@@ -120,15 +120,13 @@ $(AMALGAMATED_VIEW_FILE): $(SRCS)
 	tools/amalgamate/amalgamate.py -c tools/amalgamate/config_json_view.json -s . --verbose=yes

 NATVIS_VENV=tools/generate_natvis/venv
-# extra options for generate_natvis.py, e.g. NATVIS_ARGS="--abi-tags _diag,_dp,_ns --output my.natvis"
-NATVIS_ARGS=

 # regenerate nlohmann_json.natvis from the ABI tags and version in include/nlohmann/detail/abi_macros.hpp
 # (the dependencies are installed into a virtual environment first)
 natvis:
 	@test -d $(NATVIS_VENV) || python3 -mvenv $(NATVIS_VENV)
 	@$(NATVIS_VENV)/bin/python3 -c 'import jinja2' 2>/dev/null || $(NATVIS_VENV)/bin/pip3 install --quiet -r tools/generate_natvis/requirements.txt
-	$(NATVIS_VENV)/bin/python3 tools/generate_natvis/generate_natvis.py $(NATVIS_ARGS) .
+	$(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
@@ -151,7 +151,7 @@ The `json` class provides an API for manipulating a JSON value. To create a `jso
 ```cpp
 #include <fstream>
 #include <nlohmann/json.hpp>
-using nlohmann::json;
+using json = nlohmann::json;

 // ...

@@ -164,7 +164,7 @@ If using modules (enabled with `NLOHMANN_JSON_BUILD_MODULES`), this example beco
 import std;
 import nlohmann.json;

-using nlohmann::json;
+using json = nlohmann::json;

 // ...

@@ -842,7 +842,7 @@ assert(p == p2);
 To make this work with one of your types, you only need to provide two functions:

 ```cpp
-using nlohmann::json;
+using json = nlohmann::json;

 namespace ns {
    void to_json(json& j, const person& p) {
@@ -1257,7 +1257,7 @@ See the page [quality assurance](https://json.nlohmann.me/community/quality_assu
 #include <nlohmann/json.hpp>

 // for convenience
-using nlohmann::json;
+using json = nlohmann::json;
 ```

 to the files you want to process JSON and set the necessary switches to enable C++11 (e.g., `-std=c++11` for GCC and Clang).
@@ -361,10 +361,10 @@ add_custom_target(ci_test_coverage
    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_coverage32
    COMMAND cd ${PROJECT_BINARY_DIR}/build_coverage32 && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure

-    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused --ignore-errors inconsistent
-    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused --ignore-errors inconsistent
+    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused
+    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused
    COMMAND ${CMAKE_SOURCE_DIR}/tests/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
-    COMMAND ${GENHTML_TOOL} --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage --ignore-errors inconsistent 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"
 )
@@ -1 +1 @@
-cppcheck==1.5.3
+cppcheck==1.5.2
@@ -341,14 +341,13 @@ def download(url, docs) -> str:
        raise ValueError(f'not an http(s) URL: {url}')
    req = urllib.request.Request(u.geturl(), headers={'User-Agent': USER_AGENT})
    # (the scheme is checked above)
-    # nosemgrep: python.lang.security.audit.dynamic-urllib-use-detected.dynamic-urllib-use-detected
    with urllib.request.urlopen(req, timeout=20) as r:  # nosec B310
        data = r.read()
        ctype = r.headers.get_content_type()
    path = urllib.parse.unquote(u.path).lstrip('/')
    ext = os.path.splitext(path)[1]
    if u.query or not ext or path.endswith('/'):
-        digest = hashlib.sha256(url.encode()).hexdigest()[:12]
+        digest = hashlib.sha1(url.encode(), usedforsecurity=False).hexdigest()[:12]
        path = os.path.join(os.path.dirname(path), digest + CONTENT_TYPE_EXT.get(ctype, ext or '.bin'))
    rel = os.path.normpath(os.path.join('assets', 'external', u.hostname, path))
    out = os.path.join(docs, rel)
@@ -30,7 +30,7 @@ class (either explicitly or via the conversion operators).

 ## Return value

-1. (none) — the converted value is written to the output parameter `val`.
+1. (none) -- the converted value is written to the output parameter `val`.
 2. the JSON value `j` converted to `TargetType`

 ## Examples
@@ -67,9 +67,7 @@ class (either explicitly or via the conversion operators).

 ## See also

- [`to_json`](to_json.md) - convert a C++ value to JSON
- [Arbitrary Type Conversions](../../features/arbitrary_types.md) - write your own `from_json` and `to_json` functions
- [Converting values](../../features/conversions.md) - overview of `get`, `get_to` and implicit conversions
+- [to_json](to_json.md)

 ## Version history

@@ -30,14 +30,6 @@ struct adl_serializer {
 - [**from_json**](from_json.md) - convert a JSON value to any value type
 - [**to_json**](to_json.md) - convert any value type to a JSON value

-## See also
-
- [Arbitrary type conversions](../../features/arbitrary_types.md) - how to make your types convertible
- [`get`](../basic_json/get.md) - / [`get_to`](../basic_json/get_to.md) - convert a JSON value to a C++ type
- [`basic_json`](../basic_json/basic_json.md) - construct a JSON value from a C++ value
- [`NLOHMANN_DEFINE_TYPE_INTRUSIVE`](../macros/nlohmann_define_type_intrusive.md) - generate the conversion functions for a type
- [Specializing enum conversion](../../features/enum_conversion.md) - serializing enums as JSON strings
-
 ## Version history

 - Added in version 2.1.0.
@@ -36,9 +36,7 @@ This function is usually called by the constructors of the [basic_json](../basic

 ## See also

- [`from_json`](from_json.md) - convert JSON to a C++ value
- [Arbitrary Type Conversions](../../features/arbitrary_types.md) - write your own `from_json` and `to_json` functions
- [Converting values](../../features/conversions.md) - overview of `get`, `get_to` and implicit conversions
+- [from_json](from_json.md)

 ## Version history

@@ -23,9 +23,6 @@ Checks whether the input is valid JSON.
    respectively as UTF-8, UTF-16, and UTF-32. If `SentinelType` differs from `IteratorType`, it must be comparable to
    the iterator type with `operator!=`.
    
-    Ill-formed UTF-16 and UTF-32 sequences are rejected: a lone surrogate, a high surrogate that is not followed by its
-    low surrogate, and a code point above `U+10FFFF` all make this function return `false`.
-
 Unlike the [`parse()`](parse.md) function, this function neither throws an exception in case of invalid JSON input
 (i.e., a parse error) nor creates diagnostic information.

@@ -38,12 +35,9 @@ Unlike the [`parse()`](parse.md) function, this function neither throws an excep
    - a `#!c FILE` pointer (throws if null)
    - a C-style array of characters
    - a pointer to a null-terminated string of single byte characters (throws if null)
-    - a `std::string` or a `std::string_view` (C++17)
+    - a `std::string`
    - a container `obj` for which `begin(obj)` and `end(obj)` produce a valid pair of iterators
      (as found via ADL or member functions, with semantics compatible to `std::begin` and `std::end`)
-    - wide characters (`wchar_t`, `char16_t`, `char32_t`), which are converted to UTF-8: a wide string object
-      (`std::wstring`, `std::u16string`, `std::u32string`) or an array (e.g. a wide string literal); a pointer to a
-      null-terminated wide string (e.g. `std::u16string::c_str()`) is not supported

 `IteratorType`
 :   a compatible iterator type, for instance.
@@ -131,37 +125,13 @@ outside of a string, invalid) byte; see the [FAQ entry](../../home/faq.md#nul-by
    --8<-- "examples/accept__iterator_pair.output"
    ```

-??? example "Example: (3) reading from UTF-16 strings"
-
-    The encoding is deduced from the character type of the input. String literals like `u"..."`, `U"..."`, and
-    `L"..."` work as well.
-
-    ```cpp
-    --8<-- "examples/accept__wide_string.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/accept__wide_string.output"
-    ```
-
 ## See also

- [`parse`](parse.md) - deserialize from a compatible input
- [`sax_parse`](sax_parse.md) - parse input using the SAX interface
- [`operator>>`](../operator_gtgt.md) - deserialize from stream
+- [parse](parse.md) - deserialize from a compatible input
+- [sax_parse](sax_parse.md) - parse input using the SAX interface
+- [operator>>](../operator_gtgt.md) - deserialize from stream
 - [`JSON_STRICT_NUL_HANDLING`](../macros/json_strict_nul_handling.md) - opt in to rejecting a NUL byte in the input
  instead of treating it as end of input
- [`JSON_DISABLE_STREAM_BULK_SCAN`](../macros/json_disable_stream_bulk_scan.md) - read a `std::istream` one character
-  at a time
- [`JSON_DISABLE_UNLOCKED_FILE_IO`](../macros/json_disable_unlocked_file_io.md) - read a `FILE*` with the locking stdio
-  functions
- [Parsing](../../features/parsing/index.md) - overview of the parsing functions
- [Comments](../../features/comments.md) - ignore `//` and `/* */` comments while parsing
- [Trailing Commas](../../features/trailing_commas.md) - accept trailing commas in arrays and objects
- [Parsing and Exceptions](../../features/parsing/parse_exceptions.md) - handling parse errors and locating them in the input
- [Parsing Untrusted Input](../../features/parsing/untrusted_input.md) - limits and checks for input you do not control

 ## Version history

@@ -173,13 +143,6 @@ outside of a string, invalid) byte; see the [FAQ entry](../../home/faq.md#nul-by
 - Extended overload (2) to accept heterogeneous iterator+sentinel pairs (C++20 ranges support) in version 3.13.0.
 - `JSON_STRICT_NUL_HANDLING` added in version 3.13.0 to optionally reject a NUL byte in the input instead of treating
  it as end of input; planned to become the default in version 4.0.0.
- Parsing from an `std::istream` scans the characters in its stream buffer in bulk in version 3.13.0
-  ([`JSON_DISABLE_STREAM_BULK_SCAN`](../macros/json_disable_stream_bulk_scan.md)).
- Parsing from a `FILE*` locks the file once instead of once per character in version 3.13.0
-  ([`JSON_DISABLE_UNLOCKED_FILE_IO`](../macros/json_disable_unlocked_file_io.md)).
- Ill-formed UTF-16 and UTF-32 input (a lone surrogate, a high surrogate that is not followed by its low surrogate, or
-  a code point above `U+10FFFF`) is rejected in version 3.13.0; before that, some such sequences were accepted or
-  ended the input silently.

 !!! warning "Deprecation"

@@ -29,9 +29,9 @@ Linear in the size of `init`.
 This function is only needed to express two edge cases that cannot be realized with the initializer list constructor
 ([`basic_json(initializer_list_t, bool, value_t)`](basic_json.md)). These cases are:

-1. creating an array whose elements are all pairs whose first element is a string — in this case, the initializer list
+1. creating an array whose elements are all pairs whose first element is a string -- in this case, the initializer list
   constructor would create an object, taking the first elements as keys
-2. creating an empty array — passing the empty initializer list to the initializer list constructor yields an empty
+2. creating an empty array -- passing the empty initializer list to the initializer list constructor yields an empty
   object

 ## Examples
@@ -69,12 +69,10 @@ Arrays are stored as pointers in a `basic_json` type. That is, for any access to

 ## See also

- [`object_t`](object_t.md) - the type used to store JSON objects
- [`binary_t`](binary_t.md) - the type used to store binary values
- [`is_array`](is_array.md) - checks whether the JSON value is an array
- [`max_size`](max_size.md) - returns the maximum possible number of elements
- [Types](../../features/types/index.md) - how arrays are stored
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `ArrayType` template parameter
+- [object_t](object_t.md) the type used to store JSON objects
+- [binary_t](binary_t.md) the type used to store binary values
+- [is_array](is_array.md) checks whether the JSON value is an array
+- [max_size](max_size.md) returns the maximum possible number of elements

 ## Version history

@@ -46,8 +46,7 @@ The function is equivalent to `static_cast<json_base_class_t&>(j)` (or `static_c

 ## See also

- [`json_base_class_t`](json_base_class_t.md) - type of the custom base class
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `CustomBaseClass` template parameter
+- [json_base_class_t](json_base_class_t.md) - type of the custom base class

 ## Version history

@@ -230,19 +230,18 @@ Strong exception safety: if an exception occurs, the original value stays intact

 ## See also

- [Checked access](../../features/element_access/checked_access.md) - element access with range checking
- [`operator[]`](operator%5B%5D.md) - unchecked access by reference
- [`value`](value.md) - access with default value
- [`basic_json_view::at`](../basic_json_view/at.md) - the same access on a zero-copy view
- [Element Access](../../features/element_access/index.md) - overview of all ways to access elements
- [JSON Pointer](../../features/json_pointer.md) - access nested values with a pointer
+- 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

 1. Added in version 1.0.0.
 2. Added in version 1.0.0.
-3. Added in version 3.11.0. Support for keys convertible to `std::string_view` added in version 3.13.0, consistently
-   across the lookup functions.
+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. 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.
@@ -57,11 +57,10 @@ 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
- [Element Access](../../features/element_access/index.md) - overview of all ways to access elements
+- [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

 - Added in version 1.0.0.
- Binary values are supported since version 3.8.0.
+- Adjusted code to return reference to binary values in version 3.8.0.
@@ -52,7 +52,7 @@ basic_json(basic_json&& other) noexcept;
    The postcondition of this constructor can be restored by calling [`clear()`](clear.md).

 2. Create a `#!json null` JSON value. It either takes a null pointer as parameter (explicitly creating `#!json null`)
-   or no parameter (implicitly creating `#!json null`). The passed null pointer itself is not read — it is only used to
+   or no parameter (implicitly creating `#!json null`). The passed null pointer itself is not read -- it is only used to
   choose the right constructor.

 3. This is a "catch all" constructor for all compatible JSON types; that is, types for which a `to_json()` method
@@ -113,22 +113,19 @@ basic_json(basic_json&& other) noexcept;

    ```mermaid
    flowchart TD
-        A(["initializer_list init"]) --> B{{"empty, or every element is a 2-element<br/>array whose first element is a string?"}}
-        B -->|"yes"| C{{"type_deduction"}}
-        B -->|"no"| D{{"type_deduction"}}
+        A(["initializer_list init"]) --> B{"empty, or every element is a 2-element<br/>array whose first element is a string?"}
+        B -->|"yes"| C{"type_deduction"}
+        B -->|"no"| D{"type_deduction"}
        C -->|"true"| OBJ["create object"]
-        C -->|"false"| E{{"manual_type"}}
+        C -->|"false"| E{"manual_type"}
        E -->|"object"| OBJ
        E -->|"array"| ARR["create array"]
        D -->|"true"| ARR
-        D -->|"false"| F{{"manual_type"}}
+        D -->|"false"| F{"manual_type"}
        F -->|"array"| ARR
        F -->|"object"| ERR["throw type_error.301"]
    ```

-    <p class="nj-caption" markdown>Decision flow for an initializer list: hexagons are checks, edge labels are their
-    outcomes, and rectangles are the resulting value or exception.</p>
-
    The rules aim to create the best fit between a C++ initializer list and JSON values. The rationale is as follows:
    
    1. The empty initializer list is written as `#!cpp {}` which is exactly an empty JSON object.
@@ -476,25 +473,24 @@ basic_json(basic_json&& other) noexcept;

 ## See also

- [`array`](array.md) - create a JSON array value, forcing array creation from an initializer list even when it looks like
+- [array](array.md) create a JSON array value, forcing array creation from an initializer list even when it looks like
  an object
- [`object`](object.md) - create a JSON object value, forcing object creation from an initializer list
- [`binary`](binary.md) - create a JSON binary array value
- [`operator=`](operator=.md) - copy assignment operator
+- [object](object.md) create a JSON object value, forcing object creation from an initializer list
+- [binary](binary.md) create a JSON binary array value
+- [operator=](operator=.md) copy assignment operator
 - [Creating JSON values](../../features/creating_values.md) - the article on creating JSON values
- [Converting values](../../features/conversions.md) - which C++ types can be converted

 ## Version history

-1. Added in version 1.0.0.
-2. Added in version 1.0.0.
-3. Added in version 2.1.0.
-4. Added in version 3.1.2. Explicit for different string types if `JSON_USE_IMPLICIT_CONVERSIONS` is `0` since
+1. Since version 1.0.0.
+2. Since version 1.0.0.
+3. Since version 2.1.0.
+4. Since version 3.2.0. Explicit for different string types if `JSON_USE_IMPLICIT_CONVERSIONS` is `0` since
   version 3.13.0.
-5. Added in version 1.0.0.
-6. Added in version 1.0.0.
-7. Added in version 1.0.0. Fixed in version 3.13.0 to also check the iterator range for binary values; before, a range
+5. Since version 1.0.0.
+6. Since version 1.0.0.
+7. Since version 1.0.0. Fixed in version 3.13.0 to also check the iterator range for binary values; before, a range
   that did not cover the whole value (such as `(end(), end())`) was accepted and the whole binary value was copied,
   unlike the other primitive types.
-8. Added in version 1.0.0.
-9. Added in version 1.0.0.
+8. Since version 1.0.0.
+9. Since version 1.0.0.
@@ -7,12 +7,7 @@ const_iterator begin() const noexcept;

 Returns an iterator to the first element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
-
-<p class="nj-caption" markdown>`begin()` points to the first element and `end()` to the position after the last element;
-the dashed cell is the past-the-last position, which must not be dereferenced.</p>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -44,12 +39,12 @@ Constant.

 ## 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
- [`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
+- [end](end.md) returns an iterator to one past the last element
+- [cbegin](cbegin.md) returns a const iterator to the first element
+- [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,
+- [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
@@ -63,11 +63,10 @@ initialization of a binary array type, for backwards compatibility and so it doe

 ## See also

- [Binary formats](../../features/binary_formats/index.md) - formats that can store binary values
- [`binary_t`](binary_t.md) - type for binary values
- [`get_binary`](get_binary.md) - get a reference to the stored binary value
- [`is_binary`](is_binary.md) - return whether the value is binary
- [`byte_container_with_subtype`](../byte_container_with_subtype/index.md) - container for binary values with subtype
+- [binary_t](binary_t.md) type for binary values
+- [get_binary](get_binary.md) get a reference to the stored binary value
+- [is_binary](is_binary.md) return whether the value is binary
+- [byte_container_with_subtype](../byte_container_with_subtype/index.md) container for binary values with subtype
 - [Binary Values](../../features/binary_values.md) - the article on binary values

 ## Version history
@@ -41,7 +41,7 @@ represent a byte array in modern C++.
    [`byte_container_with_subtype`](../byte_container_with_subtype/index.md) derives directly from it. Its
    `value_type` must additionally be exactly one byte wide (e.g., `std::uint8_t`/`char`/`std::byte`): the binary
    serializers (CBOR, MessagePack, BSON, UBJSON) read and write the container's raw bytes via
-    `reinterpret_cast`, which is only correct for byte-sized elements — a container like
+    `reinterpret_cast`, which is only correct for byte-sized elements -- a container like
    `#!cpp std::vector<std::intptr_t>` will not work as `BinaryType`. The elements must be stored contiguously, and
    the binary readers additionally require `resize()` and `operator[]`. See
    [Template Parameter Requirements](../../features/types/template_parameters.md#binarytype) for the full list.
@@ -90,9 +90,8 @@ type `#!cpp binary_t*` must be dereferenced.

 - MessagePack
    - If a subtype is given and the binary array contains exactly 1, 2, 4, 8, or 16 elements, the fixext family (fixext1,
-      fixext2, fixext4, fixext8, fixext16) is used. For other sizes, the ext family (ext8, ext16, ext32) is used. The
-      subtype is then written as the signed 8-bit ext type: subtypes 128 to 255 map to the negative (reserved) ext
-      types, and on reading the ext type is exposed as an unsigned subtype from 0 to 255.
+      fixext2, fixext4, fixext8) is used. For other sizes, the ext family (ext8, ext16, ext32) is used. The subtype is
+      then added as a signed 8-bit integer.
    - If no subtype is given, the bin family (bin8, bin16, bin32) is used.

 - BSON
@@ -118,9 +117,7 @@ type `#!cpp binary_t*` must be dereferenced.

 ## See also

- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [Binary formats](../../features/binary_formats/index.md) - formats that can store binary values
- [`byte_container_with_subtype`](../byte_container_with_subtype/index.md) - container type used by binary values
+- [byte_container_with_subtype](../byte_container_with_subtype/index.md)

 ## Version history

@@ -1,48 +0,0 @@
-# <small>nlohmann::basic_json::</small>bjdata_version_t
-
-```cpp
-enum class bjdata_version_t
-{
-    draft2,
-    draft3
-};
-```
-
-This enumeration is used in [`to_bjdata`](to_bjdata.md) to choose the version of the BJData specification to write:
-
-draft2
-:   BJData Draft 2 (the default). Binary values are written as arrays of `U` integers, and ND-arrays with
-    `"_ArrayType_": "byte"` are written as regular objects, since the `B` marker is not part of Draft 2.
-
-draft3
-:   BJData Draft 3. Binary values are written as `B` elements: as an optimized binary array (`[$B#`) if both `use_size`
-    and `use_type` are set, and as an array of `B`-prefixed elements otherwise. ND-arrays with
-    `"_ArrayType_": "byte"` are written as packed arrays (`[$B#[...]`).
-
-Only the writer is affected by the version. [`from_bjdata`](from_bjdata.md) reads the markers of both drafts.
-
-## Examples
-
-??? example
-
-    The example below shows how the different values of the `bjdata_version_t` influence the serialization of a binary
-    value with [`to_bjdata`](to_bjdata.md).
-
-    ```cpp
-    --8<-- "examples/bjdata_version_t.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/bjdata_version_t.output"
-    ```
-
-## See also
-
- [to_bjdata](to_bjdata.md) serializes a JSON value to BJData
- [BJData](../../features/binary_formats/bjdata.md) - the article on the BJData format
-
-## Version history
-
- Added in version 3.12.0.
@@ -47,9 +47,7 @@ Boolean values are stored directly inside a `basic_json` type.

 ## See also

- [`is_boolean`](is_boolean.md) - checks whether the JSON value is a boolean
- [Types](../../features/types/index.md) - how booleans are stored
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `BooleanType` template parameter
+- [is_boolean](is_boolean.md) checks whether the JSON value is a boolean

 ## Version history

@@ -6,12 +6,7 @@ const_iterator cbegin() const noexcept;

 Returns an iterator to the first element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
-
-<p class="nj-caption" markdown>`cbegin()` points to the first element, like `begin()`, and `end()` to the position after
-the last element; the dashed cell is the past-the-last position, which must not be dereferenced.</p>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -43,11 +38,11 @@ Constant.

 ## 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
- [`crbegin`](crbegin.md) - returns a const reverse iterator to the last element
+- [begin](begin.md) returns an iterator to the first element
+- [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
+- [basic_json_view::cbegin](../basic_json_view/cbegin.md) - the same iteration on a zero-copy view

 ## Version history

@@ -15,13 +15,11 @@ error
 :   report a parse error in case of a tag (the `from_cbor` overloads throw a `parse_error` exception by default)

 ignore
-:   ignore tags (also in front of a text string map key)
+:   ignore tags

 store
 :   store tagged byte strings (for bytes 0xd8..0xdb) as binary values with the tag as subtype; other tagged values are
-    read as if the tag were ignored. If several tags precede a byte string, only the tag directly in front of it is
-    stored, and only when it has the form 0xd8..0xdb (a tag 0..23 written as 0xc0..0xd7 is skipped). Tags in front of a
-    text string map key are skipped.
+    read as if the tag were ignored. If several tags precede a byte string, only the innermost one is stored.

 ## Examples

@@ -42,9 +40,8 @@ store

 ## See also

- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`from_cbor`](from_cbor.md) - deserializes a JSON value from CBOR
- [`input_format_t`](input_format_t.md) - the enumeration of supported input formats
+- [from_cbor](from_cbor.md) deserializes a JSON value from CBOR
+- [input_format_t](input_format_t.md) the enumeration of supported input formats
 - [CBOR](../../features/binary_formats/cbor.md) - the article on the CBOR format

 ## Version history
@@ -6,12 +6,7 @@ const_iterator cend() const noexcept;

 Returns an iterator to one past the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
-
-<p class="nj-caption" markdown>`cend()` points to the position after the last element, like `end()`, and `begin()` to
-the first element; the dashed cell is the past-the-last position, which must not be dereferenced.</p>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -43,11 +38,11 @@ Constant.

 ## 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
- [`crend`](crend.md) - returns a const reverse iterator to one before the first element
+- [end](end.md) returns an iterator to one past the last element
+- [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
+- [basic_json_view::cend](../basic_json_view/cend.md) - the same iteration on a zero-copy view

 ## Version history

@@ -54,9 +54,8 @@ All iterators, pointers, and references related to this container are invalidate

 ## See also

- [`erase`](erase.md) - removes elements from a JSON value
- [`empty`](empty.md) - checks whether the JSON value has no elements
- [Modifying values](../../features/modifying_values.md) - the article on modifying values
+- [erase](erase.md) removes elements from a JSON value
+- [empty](empty.md) checks whether the JSON value has no elements

 ## Version history

@@ -61,18 +61,11 @@ Strong exception safety: if an exception occurs, the original value stays intact

 ## Complexity

-1. Logarithmic in the size of the JSON object.
-2. Logarithmic in the size of the JSON object.
-3. At most one lookup per reference token of `ptr`, each logarithmic in the size of the container at that level:
-   O(*n* log *m*) for *n* reference tokens and containers of size at most *m*.
-4. Deleted; a call with an integral argument does not compile.
+Logarithmic in the size of the JSON object.

 ## Notes

- Overloads (1) and (2) always return `#!cpp false` when executed on a JSON type that is not an object. Overload (3)
-  also works on arrays and on primitive values: the empty JSON pointer resolves in every JSON value (so
-  `#!cpp json(1).contains(""_json_pointer)` returns `#!cpp true`), and `#!cpp json({1, 2}).contains("/1"_json_pointer)`
-  returns `#!cpp true`.
+- This method always returns `#!cpp false` when executed on a JSON type that is not an object.
 - This method can be executed on any JSON value type.
 - Calling this function with an integer argument (for example, `#!cpp contains(0)`) does not compile: such an argument
  would otherwise implicitly convert to a null `#!cpp const char*` and, from there, cause undefined behavior when
@@ -141,16 +134,16 @@ Strong exception safety: if an exception occurs, the original value stays intact

 ## See also

- [`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
- [Element Access](../../features/element_access/index.md#does-this-key-exist) - how to test whether a key exists
+- [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

 1. Added in version 3.11.0.
-2. Added in version 3.6.0. Extended template `KeyType` to support comparable types in version 3.11.0. Support for keys
-   convertible to `std::string_view` added in version 3.13.0, consistently across the lookup functions.
+2. Added in version 3.6.0. Extended template `KeyType` to support comparable types 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), [`at`](at.md), [`value`](value.md), and other lookup functions.
 3. Added in version 3.7.0.
 4. Deleted overloads for integral key types added in version 3.13.0 to reject such calls at compile time instead of
   causing undefined behavior at runtime.
@@ -85,15 +85,15 @@ Logarithmic in the size of the JSON object.

 ## See also

- [`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
- [Element Access](../../features/element_access/index.md#does-this-key-exist) - how to test whether a key exists
+- [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

 1. Added in version 3.11.0.
-2. Added in version 1.0.0. Changed to support comparable key types in version 3.11.0. Support for keys convertible to
-   `std::string_view` added in version 3.13.0, consistently across the lookup functions.
+2. Added in version 1.0.0. Changed parameter `key` type to `KeyType&&` 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),
+   [`at`](at.md), [`value`](value.md), and other lookup functions.
 3. Deleted overload for integral key types added in version 3.13.0 to reject such calls at compile time instead of
   causing undefined behavior at runtime.
@@ -6,13 +6,7 @@ const_reverse_iterator crbegin() const noexcept;

 Returns an iterator to the reverse-beginning; that is, the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
-
-<p class="nj-caption" markdown>`crbegin()` points to the last element, like `rbegin()`, and `rend()` to the position
-before the first element. The upper row is the reversed sequence and the lower row the forward sequence; dashed arrows
-link each reverse iterator to the forward iterator it stores, and dashed cells are past-the-last positions.</p>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -44,9 +38,9 @@ Constant.

 ## See also

- [`crend`](crend.md) - returns a const reverse iterator to one before the first element
- [`rbegin`](rbegin.md) - returns a reverse iterator to the last element
- [`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
+- [rbegin](rbegin.md) returns a reverse iterator to the last element
+- [cbegin](cbegin.md) returns a const iterator to the first element
 - [Iterators](../../features/iterators.md) - the article on iterators

 ## Version history
@@ -7,13 +7,7 @@ const_reverse_iterator crend() const noexcept;
 Returns an iterator to the reverse-end; that is, one before the first element. This element acts as a placeholder,
 attempting to access it results in undefined behavior.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-rbegin-rend.svg"
-</div>
-
-<p class="nj-caption" markdown>`crend()` points to the position before the first element, like `rend()`, and `rbegin()`
-to the last element. The upper row is the reversed sequence and the lower row the forward sequence; dashed arrows link
-each reverse iterator to the forward iterator it stores, and dashed cells are past-the-last positions.</p>
+![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)

 ## Return value

@@ -45,9 +39,9 @@ Constant.

 ## See also

- [`crbegin`](crbegin.md) - returns a const reverse iterator to the last element
- [`rend`](rend.md) - returns a reverse iterator to one before the first element
- [`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
+- [rend](rend.md) returns a reverse iterator to one before the first element
+- [cend](cend.md) returns a const iterator to one past the last element
 - [Iterators](../../features/iterators.md) - the article on iterators

 ## Version history
@@ -32,10 +32,8 @@ The actual comparator used depends on [`object_t`](object_t.md) and can be obtai

 ## See also

- [`object_comparator_t`](object_comparator_t.md) - the comparator actually used by `object_t`
- [`object_t`](object_t.md) - the type used to store JSON objects
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `ObjectType` template parameter
- [Object order](../../features/object_order.md) - preserve the insertion order of keys
+- [object_comparator_t](object_comparator_t.md) the comparator actually used by `object_t`
+- [object_t](object_t.md) the type used to store JSON objects

 ## Version history

@@ -2,27 +2,17 @@

 ```cpp
 static basic_json diff(const basic_json& source,
-                       const basic_json& target,
-                       const string_t& path = "");
+                       const basic_json& target);
 ```

 Creates a [JSON Patch](http://jsonpatch.com) so that value `source` can be changed into the value `target` by calling
 [`patch`](patch.md) function.

-For two JSON values `source` and `target`, the following code yields `#!cpp true`:
+For two JSON values `source` and `target`, the following code always yields `#!cpp true`:
 ```cpp
 source.patch(diff(source, target)) == target;
 ```

-The equality holds up to [`operator==`](operator_eq.md), so it has the following exceptions:
-
- A value that is not equal to itself cannot round-trip. This applies to `NaN` (also nested in an array or object) and
-  to [discarded](is_discarded.md) values: `diff` emits a `replace` operation for them. A `NaN` in the patch is
-  serialized as `#!json null`, so a patch that was dumped and parsed again would set `#!json null`.
- Numbers that compare equal produce no operation, even if their types or signs differ: `diff(1, 1.0)`,
-  `diff(1u, 1)` (unsigned and signed integer) and `diff(0.0, -0.0)` all return `#!json []`. The patched value is then
-  the `source` and keeps its number type.
-
 ## Parameters

 `source` (in)
@@ -31,12 +21,6 @@ The equality holds up to [`operator==`](operator_eq.md), so it has the following
 `target` (in)
 :   JSON value to compare against

-`path` (in)
-:   a prefix that is put verbatim in front of the `path` member of every operation (default: `""`, which addresses the
-    root of the value). The prefix is neither escaped nor validated: `#!cpp diff(1, 2, "abc")` yields an operation with
-    the `path` `abc`, which is not a valid JSON Pointer. Use it with a valid JSON Pointer such as `/root` and escape
-    `~` and `/` in its reference tokens (see [JSON Pointer](../../features/json_pointer.md)).
-
 ## Return value

 a JSON patch to convert the `source` to `target`
@@ -47,32 +31,11 @@ Strong guarantee: `source` and `target` are never modified.

 ## Complexity

-Linear in the total number of values (including nested ones) in `source` and `target`, times the cost of a key-based
-object operation (looking up a key in an object): logarithmic for [`json`](../json.md), and linear for
-[`ordered_json`](../ordered_json.md) (see [`ordered_map` complexity](../ordered_map.md#complexity)). For
-`ordered_json`, diffing two objects with `n` and `m` members therefore takes O((n+m)²) when their keys do not line up
-(e.g., a key was added or the keys are in a different order). The size of the patch is proportional to the number of
-operations times the length of their paths, so a small change deep inside a value yields a long `path`.
+Linear in the lengths of `source` and `target`.

 ## Notes

- Currently, only `remove`, `add`, and `replace` operations are generated.
- The patch is correct, but not guaranteed to be minimal. For instance, `diff([1,2,3], [0,1,2,3])` yields three
-  `replace` operations and one `add` operation instead of a single insertion.
- Differences between two arrays are reported index by index. Elements that were added at the end of the array are added
-  with `add` operations on the path `/-` (appended in order), and elements that were removed are removed with `remove`
-  operations from the highest index down to the lowest, so that the remaining indices stay valid.
- For objects, the operations for the members of `source` come first (`replace`, `remove`, or the operations for nested
-  values, in the iteration order of `source`), followed by `add` operations for the members that only `target` has.
- For [`ordered_json`](../ordered_json.md), objects with the same keys in a different order are different. As a patch
-  cannot reorder members, `diff` removes all keys of the `source` object and adds them again in the order of the
-  `target`.
- If `source` and `target` differ as a whole (e.g., different types), the patch consists of a single `replace`
-  operation for the root of the value, i.e., with the `path` `""` (or the given `path` prefix).
- The `value` members of the patch hold copies of values of `target`. A [binary](../../features/binary_values.md) value
-  has no JSON representation: when a patch that contains one is serialized, it becomes an object such as
-  `#!json {"bytes":[1,3],"subtype":null}`, so a parsed patch no longer holds a binary value (and would set that object
-  instead).
+Currently, only `remove`, `add`, and `replace` operations are generated.
          
 ## Examples

@@ -92,12 +55,11 @@ operations times the length of their paths, so a small change deep inside a valu

 ## See also

- [RFC 6902 (JSON Patch)](https://tools.ietf.org/html/rfc6902) - specification of JSON Patch
- [`patch`](patch.md) - applies a JSON Patch
- [`patch_inplace`](patch_inplace.md) - applies a JSON Patch in place
- [`merge_patch`](merge_patch.md) - applies a JSON Merge Patch
- [`merge_diff`](merge_diff.md) - creates a diff as a JSON Merge Patch
- [JSON Patch and Diff](../../features/json_patch.md) - the article on JSON Patch
+- [RFC 6902 (JSON Patch)](https://tools.ietf.org/html/rfc6902)
+- [patch](patch.md) applies a JSON Patch
+- [patch_inplace](patch_inplace.md) applies a JSON Patch in place
+- [merge_patch](merge_patch.md) applies a JSON Merge Patch
+- [merge_diff](merge_diff.md) creates a diff as a JSON Merge Patch

 ## Version history

@@ -89,9 +89,9 @@ Binary values are serialized as an object containing two keys:

 ## See also

- [`to_string`](to_string.md) - returns a string representation of a JSON value
- [`operator<<`](../operator_ltlt.md) - serialize to stream
- [`basic_json_view::dump`](../basic_json_view/dump.md) - the corresponding function of `basic_json_view`, serializing
+- [to_string](to_string.md) returns a string representation of a JSON value
+- [operator<<](../operator_ltlt.md) serialize to stream
+- [`basic_json_view::dump`](../basic_json_view/dump.md) the corresponding function of `basic_json_view`, serializing
  directly from a flat index without building a `basic_json` value
 - [Serialization](../../features/serialization.md) - the serialization article

@@ -63,12 +63,12 @@ Logarithmic in the size of the container, O(log(`size()`)).

 ## See also

- [`emplace_back`](emplace_back.md) - add a value to an array
- [`insert`](insert.md) - add values to an array/object
+- [emplace_back](emplace_back.md) add a value to an array
+- [insert](insert.md) add values to an array/object
 - [Modifying values](../../features/modifying_values.md) - the article on modifying values

 ## Version history

- Added in version 2.0.8.
+- Since version 2.0.8.
 - Fixed in version 3.13.0: for [`ordered_json`](../ordered_json.md), the value could previously only be passed as an
  rvalue; it can now also be passed as an lvalue or a `#!cpp const` lvalue, matching the behavior of `json`.
@@ -61,11 +61,11 @@ Amortized constant.

 ## See also

- [`operator+=`](operator+=.md) - add a value to an array/object
- [`push_back`](push_back.md) - add a value to an array/object
+- [operator+=](operator+=.md) add a value to an array/object
+- [push_back](push_back.md) add a value to an array/object
 - [Modifying values](../../features/modifying_values.md) - the article on modifying values

 ## Version history

- Added in version 2.0.8.
+- Since version 2.0.8.
 - Returns reference since 3.7.0.
@@ -41,7 +41,7 @@ bool empty() const noexcept

 ## Notes

-This function does not return whether a string stored as JSON value is empty — it returns whether the JSON container
+This function does not return whether a string stored as JSON value is empty -- it returns whether the JSON container
 itself is empty which is `#!cpp false` in the case of a string.

 ## Examples
@@ -62,9 +62,9 @@ itself is empty which is `#!cpp false` in the case of a string.

 ## See also

- [`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
+- [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

@@ -7,12 +7,7 @@ const_iterator end() const noexcept;

 Returns an iterator to one past the last element.

-<div class="nj-fig-wrap" markdown>
--8<-- "images/range-begin-end.svg"
-</div>
-
-<p class="nj-caption" markdown>`end()` points to the position after the last element and `begin()` to the first element;
-the dashed cell is the past-the-last position, which must not be dereferenced.</p>
+![Illustration from cppreference.com](../../images/range-begin-end.svg)

 ## Return value

@@ -44,11 +39,11 @@ Constant.

 ## 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
- [`rend`](rend.md) - returns a reverse iterator to one before the first element
+- [begin](begin.md) returns an iterator to the first element
+- [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
+- [basic_json_view::end](../basic_json_view/end.md) - the same iteration on a zero-copy view

 ## Version history

@@ -60,9 +60,8 @@ Constant.

 ## See also

- [`start_pos`](start_pos.md) - to access the start position
- [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) - overview of the supported conversions
- [Parsing and Exceptions](../../features/parsing/parse_exceptions.md) - handling parse errors and locating them in the input
+- [start_pos](start_pos.md) to access the start position
+- [JSON_DIAGNOSTIC_POSITIONS](../macros/json_diagnostic_positions.md) for an overview of the diagnostic positions

 ## Version history

@@ -204,8 +204,8 @@ Strong exception safety: if an exception occurs, the original value stays intact

 ## See also

- [`clear`](clear.md) - clears the contents
- [`insert`](insert.md) - add values to an array/object
+- [clear](clear.md) clears the contents
+- [insert](insert.md) add values to an array/object
 - [Modifying values](../../features/modifying_values.md) - the article on modifying values

 ## Version history
@@ -213,6 +213,7 @@ Strong exception safety: if an exception occurs, the original value stays intact
 1. Added in version 1.0.0. Added support for binary types in version 3.8.0.
 2. Added in version 1.0.0. Added support for binary types in version 3.8.0.
 3. Added in version 1.0.0.
-4. Added in version 3.11.0. Support for keys convertible to `std::string_view` added in version 3.13.0, consistently
-   across the lookup functions.
+4. 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), [`at`](at.md), [`value`](value.md), and other lookup
+   functions.
 5. Added in version 1.0.0.
@@ -61,7 +61,7 @@ keep

 ## See also

- [`dump`](dump.md) - serializes a JSON value, with an `error_handler_t` parameter to configure invalid UTF-8 handling
+- [dump](dump.md) serializes a JSON value, with an `error_handler_t` parameter to configure invalid UTF-8 handling
 - [Handling invalid UTF-8](../../features/serialization.md#handling-invalid-utf-8) - the article on handling invalid UTF-8

 ## Version history
@@ -40,9 +40,6 @@ classDiagram
    style json_exception fill:#CCCCFF
 ```

-<p class="nj-caption" markdown>Class hierarchy of the library's exceptions; arrows point from a derived class to its
-base class, and the highlighted box is `basic_json::exception`.</p>
-
 Subclasses:

 - [`parse_error`](parse_error.md) for exceptions indicating a parse error
@@ -83,12 +80,8 @@ constructor.

 ## See also

- [List of exceptions](../../home/exceptions.md) - overview of all exceptions thrown by the library
- [Working Without Exceptions](../../features/no_exceptions.md) - using the library without exceptions
- [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) - extended exception messages with the path of the failing value
- [Parsing and Exceptions](../../features/parsing/parse_exceptions.md) - parsing alternatives that do not throw
- [Debugging](../../home/debugging.md) - debugging aids
+[List of exceptions](../../home/exceptions.md)

 ## Version history

- Added in version 3.0.0.
+- Since version 3.0.0.
@@ -91,16 +91,15 @@ Logarithmic in the size of the JSON object.

 ## See also

- [`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 (a duplicate key resolves
-  to the first member, whereas `parse()` keeps the last)
- [Element Access](../../features/element_access/index.md#does-this-key-exist) - how to test whether a key exists
+- [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

 1. Added in version 3.11.0.
-2. Added in version 1.0.0. Changed to support comparable types in version 3.11.0. Support for keys convertible to
-   `std::string_view` added in version 3.13.0, consistently across the lookup functions.
+2. Added in version 1.0.0. Changed to support comparable types 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),
+   [`at`](at.md), [`value`](value.md), and other lookup functions.
 3. Deleted overloads for integral key types added in version 3.13.0 to reject such calls at compile time instead of
   causing undefined behavior at runtime.
@@ -58,8 +58,7 @@ Empty objects and arrays are flattened to `#!json null` and will not be reconstr

 ## See also

- [`unflatten`](unflatten.md) - the reverse function
- [JSON Pointer](../../features/json_pointer.md#flatten-unflatten) - the article on JSON Pointer and flattening
+- [unflatten](unflatten.md) the reverse function

 ## Version history

@@ -86,8 +86,8 @@ std::string format_as(const BasicJsonType& j)

 ## See also

- [`dump`](dump.md) - serialize a JSON value to a string
- [`std::formatter<basic_json>`](std_formatter.md) - the `std::format` (C++20) equivalent
+- [dump](dump.md)
+- [std::formatter<basic_json>](std_formatter.md) - the `std::format` (C++20) equivalent
 - [Serialization](../../features/serialization.md) - the serialization article

 ## Version history
@@ -82,11 +82,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if a parse error occurs
 - Throws [parse_error.113](../../home/exceptions.md#jsonexceptionparse_error113) if a string could not be parsed
  successfully, or if a string value or object key is not valid UTF-8 and `error_handler` is `strict`
- Throws [parse_error.115](../../home/exceptions.md#jsonexceptionparse_error115) if the text of a high-precision
-  number (`H`) is not a valid number
 - Throws [out_of_range.408](../../home/exceptions.md#jsonexceptionout_of_range408) if the size of an optimized container
-  cannot be represented by `std::size_t` or exceeds the container's `max_size()`, or if the product of the dimensions of
-  an n-dimensional array overflows
+  or n-dimensional array cannot be represented by `std::size_t`

 ## Complexity

@@ -110,16 +107,12 @@ Linear in the size of the input.

 ## See also

- [BJData](../../features/binary_formats/bjdata.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`to_bjdata`](to_bjdata.md) - create a BJData serialization of a JSON value
- [`from_cbor`](from_cbor.md) - create a JSON value from an input in CBOR format
- [`from_msgpack`](from_msgpack.md) - create a JSON value from an input in MessagePack format
- [`from_bson`](from_bson.md) - create a JSON value from an input in BSON format
- [`from_ubjson`](from_ubjson.md) - create a JSON value from an input in UBJSON format
- [`from_bon8`](from_bon8.md) - create a JSON value from an input in BON8 format
+- [to_bjdata](to_bjdata.md) create a BJData serialization of a JSON value
+- [from_cbor](from_cbor.md) create a JSON value from an input in CBOR format
+- [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
+- [from_bson](from_bson.md) create a JSON value from an input in BSON format
+- [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
+- [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format

 ## Version history

@@ -74,11 +74,6 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if a parse error occurs, for instance
  an invalid byte, a string that is not valid UTF-8, or an object key that is not a string

-The UTF-8 validity of strings is always checked, independent of
-[`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md), because the end of a BON8 string is determined from
-its encoding. Duplicate object keys are accepted; the last value wins (see
-[BON8](../../features/binary_formats/bon8.md)).
-
 ## Complexity

 Linear in the size of the input.
@@ -101,15 +96,12 @@ Linear in the size of the input.

 ## See also

- [BON8](../../features/binary_formats/bon8.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [`to_bon8`](to_bon8.md) - create a BON8 serialization of a JSON value
- [`from_cbor`](from_cbor.md) - create a JSON value from an input in CBOR format
- [`from_msgpack`](from_msgpack.md) - create a JSON value from an input in MessagePack format
- [`from_bson`](from_bson.md) - create a JSON value from an input in BSON format
- [`from_ubjson`](from_ubjson.md) - create a JSON value from an input in UBJSON format
- [`from_bjdata`](from_bjdata.md) - create a JSON value from an input in BJData format
+- [to_bon8](to_bon8.md) create a BON8 serialization of a JSON value
+- [from_cbor](from_cbor.md) create a JSON value from an input in CBOR format
+- [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
+- [from_bson](from_bson.md) create a JSON value from an input in BSON format
+- [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
+- [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format

 ## Version history

@@ -80,8 +80,7 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [`parse_error.110`](../../home/exceptions.md#jsonexceptionparse_error110) if the given input ends prematurely or
  the end of the input was not reached when `strict` was set to true
 - Throws [`parse_error.112`](../../home/exceptions.md#jsonexceptionparse_error112) if a parse error occurs (e.g., an
-  invalid string or byte array length, an invalid inner length of a binary value with subtype `0x02`, or a document size
-  that does not match the content; `strict` does not affect the document size checks)
+  invalid string or byte array length)
 - Throws [`parse_error.114`](../../home/exceptions.md#jsonexceptionparse_error114) if an unsupported BSON record type is
  encountered
 - Throws [`parse_error.113`](../../home/exceptions.md#jsonexceptionparse_error113) if a string value or object key is
@@ -109,17 +108,13 @@ Linear in the size of the input.

 ## See also

- [BSON](../../features/binary_formats/bson.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [BSON specification](http://bsonspec.org/spec.html) - specification of the BSON format
- [`to_bson`](to_bson.md) - the analogous serialization
- [`from_cbor`](from_cbor.md) - the related CBOR format
- [`from_msgpack`](from_msgpack.md) - the related MessagePack format
- [`from_ubjson`](from_ubjson.md) - the related UBJSON format
- [`from_bjdata`](from_bjdata.md) - the related BJData format
- [`from_bon8`](from_bon8.md) - the related BON8 format
+- [BSON specification](http://bsonspec.org/spec.html)
+- [to_bson](to_bson.md) for the analogous serialization
+- [from_cbor](from_cbor.md) for the related CBOR format
+- [from_msgpack](from_msgpack.md) for the related MessagePack format
+- [from_ubjson](from_ubjson.md) for the related UBJSON format
+- [from_bjdata](from_bjdata.md) for the related BJData format
+- [from_bon8](from_bon8.md) for the related BON8 format

 ## Version history

@@ -32,10 +32,8 @@ The exact mapping and its limitations are described on a [dedicated page](../../
    
    - an `std::istream` object
    - a `FILE` pointer
-    - a C-style array of characters (its terminating NUL is read as trailing data: `parse_error.110` unless `strict` is
-      `false`)
-    - a pointer to a null-terminated string of single byte characters (read up to the first 0x00 byte, which is a valid
-      CBOR byte)
+    - a C-style array of characters
+    - a pointer to a null-terminated string of single byte characters
    - a container `obj` for which `begin(obj)` and `end(obj)` produce a valid pair of iterators
      (as found via ADL or member functions, with semantics compatible to `std::begin` and `std::end`)

@@ -91,14 +89,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if unsupported features from CBOR were
  used in the given input or if the input is not valid CBOR
 - Throws [parse_error.113](../../home/exceptions.md#jsonexceptionparse_error113) if a map key is not a string (keys of
-  other types are not supported, as JSON object keys are always strings), if the head of a string or byte string is
-  malformed (including a chunk of the wrong type or an indefinite-length string nested inside an indefinite-length
-  string), or if a string value or object key (or one chunk of an indefinite-length string) is not valid UTF-8 and
-  `error_handler` is `strict`
- Throws [out_of_range.408](../../home/exceptions.md#jsonexceptionout_of_range408) if an array or map announces
-  a length that `std::size_t` cannot hold, or that equals `std::size_t(-1)` (for example `9B FF FF FF FF FF FF FF FF`)
- Throws [out_of_range.406](../../home/exceptions.md#jsonexceptionout_of_range406) if a floating-point number does not
-  fit into `number_float_t`
+  other types are not supported, as JSON object keys are always strings), or if a string value or object key is not
+  valid UTF-8 and `error_handler` is `strict`

 ## Complexity

@@ -122,16 +114,12 @@ Linear in the size of the input.

 ## See also

- [CBOR](../../features/binary_formats/cbor.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`to_cbor`](to_cbor.md) - create a CBOR serialization of a JSON value
- [`from_msgpack`](from_msgpack.md) - create a JSON value from an input in MessagePack format
- [`from_bson`](from_bson.md) - create a JSON value from an input in BSON format
- [`from_ubjson`](from_ubjson.md) - create a JSON value from an input in UBJSON format
- [`from_bjdata`](from_bjdata.md) - create a JSON value from an input in BJData format
- [`from_bon8`](from_bon8.md) - create a JSON value from an input in BON8 format
+- [to_cbor](to_cbor.md) create a CBOR serialization of a JSON value
+- [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
+- [from_bson](from_bson.md) create a JSON value from an input in BSON format
+- [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
+- [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
+- [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format

 ## Version history

@@ -107,16 +107,12 @@ Linear in the size of the input.

 ## See also

- [MessagePack](../../features/binary_formats/messagepack.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`to_msgpack`](to_msgpack.md) - create a MessagePack serialization of a JSON value
- [`from_cbor`](from_cbor.md) - create a JSON value from an input in CBOR format
- [`from_bson`](from_bson.md) - create a JSON value from an input in BSON format
- [`from_ubjson`](from_ubjson.md) - create a JSON value from an input in UBJSON format
- [`from_bjdata`](from_bjdata.md) - create a JSON value from an input in BJData format
- [`from_bon8`](from_bon8.md) - create a JSON value from an input in BON8 format
+- [to_msgpack](to_msgpack.md) create a MessagePack serialization of a JSON value
+- [from_cbor](from_cbor.md) create a JSON value from an input in CBOR format
+- [from_bson](from_bson.md) create a JSON value from an input in BSON format
+- [from_ubjson](from_ubjson.md) create a JSON value from an input in UBJSON format
+- [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
+- [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format

 ## Version history

@@ -79,18 +79,11 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va

 - Throws [parse_error.110](../../home/exceptions.md#jsonexceptionparse_error110) if the given input ends prematurely or
  the end of the file was not reached when `strict` was set to true
- Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if an invalid type marker is read
-  (including a type marker after `$` of an optimized container, even if its count is 0), or if `$` is not followed by `#`
+- Throws [parse_error.112](../../home/exceptions.md#jsonexceptionparse_error112) if a parse error occurs
 - Throws [parse_error.113](../../home/exceptions.md#jsonexceptionparse_error113) if a string could not be parsed
-  successfully (negative or non-integer length, `C` followed by a byte above 0x7F), if the count of an optimized
-  container is negative, or if a string value or object key is not valid UTF-8 and `error_handler` is `strict`
- Throws [parse_error.115](../../home/exceptions.md#jsonexceptionparse_error115) if the text of a high-precision number
-  (`H`) is not a valid JSON number
- Throws [out_of_range.406](../../home/exceptions.md#jsonexceptionout_of_range406) if a high-precision number, or a
-  float64 when `number_float_t` is `float`, does not fit into `number_float_t`
- Throws [out_of_range.408](../../home/exceptions.md#jsonexceptionout_of_range408) if the count of an optimized
-  container exceeds the capacity of the container (or of `std::size_t`), or if an optimized array of `Z`, `T`, or `F` has
-  more than 1,048,576 elements
+  successfully, or if a string value or object key is not valid UTF-8 and `error_handler` is `strict`
+- Throws [out_of_range.408](../../home/exceptions.md#jsonexceptionout_of_range408) if the size of an optimized container
+  or n-dimensional array cannot be represented by `std::size_t`

 ## Complexity

@@ -114,16 +107,12 @@ Linear in the size of the input.

 ## See also

- [UBJSON](../../features/binary_formats/ubjson.md) - the format, its byte layout and how values are mapped
- [Binary formats](../../features/binary_formats/index.md) - overview and comparison of the supported binary formats
- [Parsing untrusted input](../../features/parsing/untrusted_input.md) - limits and safe handling of hostile data
- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`to_ubjson`](to_ubjson.md) - create a UBJSON serialization of a JSON value
- [`from_cbor`](from_cbor.md) - create a JSON value from an input in CBOR format
- [`from_msgpack`](from_msgpack.md) - create a JSON value from an input in MessagePack format
- [`from_bson`](from_bson.md) - create a JSON value from an input in BSON format
- [`from_bjdata`](from_bjdata.md) - create a JSON value from an input in BJData format
- [`from_bon8`](from_bon8.md) - create a JSON value from an input in BON8 format
+- [to_ubjson](to_ubjson.md) create a UBJSON serialization of a JSON value
+- [from_cbor](from_cbor.md) create a JSON value from an input in CBOR format
+- [from_msgpack](from_msgpack.md) create a JSON value from an input in MessagePack format
+- [from_bson](from_bson.md) create a JSON value from an input in BSON format
+- [from_bjdata](from_bjdata.md) create a JSON value from an input in BJData format
+- [from_bon8](from_bon8.md) create a JSON value from an input in BON8 format

 ## Version history

@@ -50,12 +50,10 @@ 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 (document order, not
-  sorted; duplicate keys are visited)
- [Element Access](../../features/element_access/index.md) - overview of all ways to access elements
+- [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

 - Added in version 1.0.0.
- Binary values are supported since version 3.8.0.
+- Adjusted code to return reference to binary values in version 3.8.0.
@@ -178,17 +178,16 @@ overload (3).

 ## See also

- [`get_to`](get_to.md) - convert and write into a passed value
- [`get_ptr`](get_ptr.md) - get a pointer to the stored value
- [`get_ref`](get_ref.md) - get a reference to the stored value
- [`operator ValueType`](operator_ValueType.md) - get a value via implicit conversion
+- [get_to](get_to.md) convert and write into a passed value
+- [get_ptr](get_ptr.md) get a pointer to the stored value
+- [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
+- [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)
- [Arbitrary Type Conversions](../../features/arbitrary_types.md) - make your own types usable with `get`

 ## Version history

-1. Added in version 2.1.0.
-2. Added in version 2.1.0. Extended to work with other specializations of `basic_json` in version 3.1.2.
-3. Added in version 1.0.0.
+1. Since version 2.1.0.
+2. Since version 2.1.0. Extended to work with other specializations of `basic_json` in version 3.2.0.
+3. Since version 1.0.0.
@@ -36,7 +36,7 @@ Constant.

 ## See also

- [`basic_json`](index.md#template-parameters) - the class template, with `AllocatorType` as one of its template parameters
+- [basic_json](index.md#template-parameters) the class template, with `AllocatorType` as one of its template parameters
 - [Template Parameter Requirements](../../features/types/template_parameters.md#allocatortype) - the requirements for `AllocatorType`

 ## Version history
@@ -42,11 +42,8 @@ Constant.

 ## See also

- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`binary`](binary.md) - create a binary value
- [`is_binary`](is_binary.md) - check whether a value is binary
- [`get`](get.md) - get a value (explicit conversion)
- [`get_ref`](get_ref.md) - get a reference to the stored value
+- [get](get.md) get a value (explicit conversion)
+- [get_ref](get_ref.md) get a reference to the stored value

 ## Version history

@@ -45,7 +45,7 @@ Constant.
    #include <iostream>
    #include <nlohmann/json.hpp>
    
-    using nlohmann::json;
+    using json = nlohmann::json;
    
    int main()
    {
@@ -86,8 +86,7 @@ Constant.

 ## See also

- [`get_ref()`](get_ref.md) - get a reference value
- [Converting values](../../features/conversions.md) - getting values out, with or without copying
+- [get_ref()](get_ref.md) get a reference value

 ## Version history

@@ -60,10 +60,9 @@ 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
+- [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
- [Converting values](../../features/conversions.md) - getting values out, with or without copying

 ## Version history

@@ -68,14 +68,13 @@ Depends on the `json_serializer<ValueType>::from_json()` implementation.

 ## See also

- [`get`](get.md) - get a value (explicit conversion)
- [`get_ref`](get_ref.md) - get a reference to the stored value
- [`get_ptr`](get_ptr.md) - get a pointer to the stored value
+- [get](get.md) get a value (explicit conversion)
+- [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
- [Arbitrary Type Conversions](../../features/arbitrary_types.md) - make your own types usable with `get_to`
+- [basic_json_view::get_to](../basic_json_view/get_to.md) - the same conversion on a zero-copy view

 ## Version history

- Added in version 3.3.0.
+- Since version 3.3.0.
 - Added a `static_assert` with a clear message for `const` arguments in version 3.13.0.
@@ -44,22 +44,6 @@ are collected in [Template Parameter Requirements](../../features/types/template
 - [**json**](../json.md) - default specialization
 - [**ordered_json**](../ordered_json.md) - a specialization that maintains the insertion order of object keys

-## Documents and views
-
-Besides `basic_json`, the library offers a second way to hold a parsed JSON text: a
-[`basic_json_document`](../basic_json_document/index.md), which owns or borrows the text and holds a flat index of the
-values in it, and a [`basic_json_view`](../basic_json_view/index.md), a read-only handle to one value of such a document.
-Both are defined in the header `<nlohmann/json_view.hpp>`; see
-[Zero-copy JSON views](../../features/json_view.md) for the concept and the trade-offs.
-
- [**json_document**](../json_document.md) / [**ordered_json_document**](../ordered_json_document.md) - read-only
-  documents of the `basic_json` specialization they belong to
- [**json_editable_document**](../json_editable_document.md) /
-  [**ordered_json_editable_document**](../ordered_json_editable_document.md) - documents that can be modified in place
- [**json_view**](../json_view.md) / [**ordered_json_view**](../ordered_json_view.md) - views of a document
- [**json_editable_view**](../json_editable_view.md) /
-  [**ordered_json_editable_view**](../ordered_json_editable_view.md) - views of an editable document
-
 ## Iterator invalidation

 All operations that add values to an **array** ([`push_back`](push_back.md) , [`operator+=`](operator+=.md),
@@ -121,7 +105,6 @@ The class satisfies the following concept requirements:
 - [**json_pointer**](../json_pointer/index.md) - JSON Pointer implementation
 - [**json_serializer**](json_serializer.md) - type of the serializer to for conversions from/to JSON
 - [**error_handler_t**](error_handler_t.md) - type to choose behavior on decoding errors
- [**bjdata_version_t**](bjdata_version_t.md) - type to choose the BJData version to write
 - [**cbor_tag_handler_t**](cbor_tag_handler_t.md) - type to choose how to handle CBOR tags
 - **initializer_list_t** - type for initializer lists of `basic_json` values
 - [**input_format_t**](input_format_t.md) - type to choose the format to parse
@@ -189,7 +172,7 @@ The class satisfies the following concept requirements:
 Functions to inspect the type of a JSON value.

 - [**type**](type.md) - return the type of the JSON value
- [`operator value_t`](operator_value_t.md) - return the type of the JSON value
+- [**operator value_t**](operator_value_t.md) - return the type of the JSON value
 - [**type_name**](type_name.md) - return the type as string
 - [**is_primitive**](is_primitive.md) - return whether the type is primitive
 - [**is_structured**](is_structured.md) - return whether the type is structured
@@ -218,7 +201,7 @@ Direct access to the stored value of a JSON value.
 - [**get_to**](get_to.md) - get a value and write it to a destination
 - [**get_ptr**](get_ptr.md) - get a pointer value
 - [**get_ref**](get_ref.md) - get a reference value
- [`operator ValueType`](operator_ValueType.md) - get a value
+- [**operator ValueType**](operator_ValueType.md) - get a value
 - [**get_binary**](get_binary.md) - get a binary value
 - [**as_base_class**](as_base_class.md) - access the custom base class

@@ -359,15 +342,7 @@ Access to the JSON value

 ## See also

- [RFC 8259: The JavaScript Object Notation (JSON) Data Interchange Format](https://tools.ietf.org/html/rfc8259) -
-  specification of the JSON data interchange format
- [`basic_json_document`](../basic_json_document/index.md) - / [`basic_json_view`](../basic_json_view/index.md) - parse a JSON
-  text into a flat index and read it through a view
- [Zero-copy JSON views](../../features/json_view.md) - when to use a document and a view instead of a `basic_json`
- [Types](../../features/types/index.md) - how JSON values are stored and which types exist
- [Converting values](../../features/conversions.md) - get values out of a JSON value and put values in
- [Creating JSON values](../../features/creating_values.md) - all the ways to build a JSON value
- [Arbitrary Type Conversions](../../features/arbitrary_types.md) - convert your own types to and from JSON
+- [RFC 8259: The JavaScript Object Notation (JSON) Data Interchange Format](https://tools.ietf.org/html/rfc8259)

 ## Version history

@@ -53,9 +53,8 @@ bon8

 ## See also

- [`sax_parse`](sax_parse.md) - generic SAX parse interface, taking an `input_format_t` to select the input format
- [`cbor_tag_handler_t`](cbor_tag_handler_t.md) - configures how CBOR tags are treated while parsing
- [Binary Formats](../../features/binary_formats/index.md) - CBOR, MessagePack, BSON, and other formats
+- [sax_parse](sax_parse.md) generic SAX parse interface, taking an `input_format_t` to select the input format
+- [cbor_tag_handler_t](cbor_tag_handler_t.md) configures how CBOR tags are treated while parsing

 ## Version history

@@ -185,11 +185,10 @@ Strong exception safety: if an exception occurs, the original value stays intact

 ## See also

- [`emplace`](emplace.md) - add a value to an object
- [`emplace_back`](emplace_back.md) - add a value to an array
- [`push_back`](push_back.md) - add a value to an array/object
- [`update`](update.md) - merges objects
- [Modifying values](../../features/modifying_values.md) - the article on modifying values
+- [emplace](emplace.md) add a value to an object
+- [emplace_back](emplace_back.md) add a value to an array
+- [push_back](push_back.md) add a value to an array/object
+- [update](update.md) merges objects

 ## Version history

@@ -40,9 +40,6 @@ classDiagram
    style json_invalid_iterator fill:#CCCCFF
 ```

-<p class="nj-caption" markdown>Class hierarchy of the library's exceptions; arrows point from a derived class to its
-base class, and the highlighted box is `basic_json::invalid_iterator`.</p>
-
 ## Member functions

 - **what** - returns explanatory string
@@ -69,15 +66,13 @@ base class, and the highlighted box is `basic_json::invalid_iterator`.</p>

 ## See also

- [`exception`](exception.md) - the base class of all exceptions thrown by the library
- [List of iterator errors](../../home/exceptions.md#iterator-errors) - overview of iterator errors (`invalid_iterator`)
- [`parse_error`](parse_error.md) - exceptions indicating a parse error
- [`type_error`](type_error.md) - exceptions indicating executing a member function with a wrong type
- [`out_of_range`](out_of_range.md) - exceptions indicating access out of the defined range
- [`other_error`](other_error.md) - exceptions indicating other library errors
- [Exceptions](../../home/exceptions.md) - all exceptions and their error codes
- [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) - extended exception messages with the path of the failing value
+- [`exception`](exception.md) for the base class of all exceptions thrown by the library
+- [List of iterator errors](../../home/exceptions.md#iterator-errors)
+- [`parse_error`](parse_error.md) for exceptions indicating a parse error
+- [`type_error`](type_error.md) for exceptions indicating executing a member function with a wrong type
+- [`out_of_range`](out_of_range.md) for exceptions indicating access out of the defined range
+- [`other_error`](other_error.md) for exceptions indicating other library errors

 ## Version history

- Added in version 3.0.0.
+- Since version 3.0.0.
@@ -36,12 +36,11 @@ Constant.

 ## See also

- [`is_object`](is_object.md) - checks whether the JSON value is an object
- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [is_object](is_object.md) checks whether the JSON value is an object
+- [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

@@ -36,11 +36,10 @@ Constant.

 ## See also

- [Binary values](../../features/binary_values.md) - how binary values and subtypes are handled
- [`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
+- [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

@@ -36,10 +36,9 @@ Constant.

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [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

@@ -87,9 +87,8 @@ with `allow_exceptions` set to `#!cpp false`: a parse error then yields a discar

 ## See also

- [`basic_json_view::is_discarded`](../basic_json_view/is_discarded.md) - the corresponding check on a zero-copy view,
+- [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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored

 ## Version history

@@ -36,12 +36,11 @@ Constant.

 ## See also

- [`is_array`](is_array.md) - checks whether the JSON value is an array
- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [is_array](is_array.md) checks whether the JSON value is an array
+- [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

@@ -46,12 +46,10 @@ constexpr bool is_number() const noexcept

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
- [Number Handling](../../features/types/number_handling.md) - how numbers are stored and converted
+- [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

@@ -37,12 +37,10 @@ Constant.

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
- [Number Handling](../../features/types/number_handling.md) - how numbers are stored and converted
+- [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

@@ -37,12 +37,10 @@ Constant.

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
- [Number Handling](../../features/types/number_handling.md) - how numbers are stored and converted
+- [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

@@ -40,12 +40,10 @@ Constant.

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
- [Number Handling](../../features/types/number_handling.md) - how numbers are stored and converted
+- [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

@@ -36,12 +36,11 @@ Constant.

 ## See also

- [`is_array`](is_array.md) - checks whether the JSON value is an array
- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [is_array](is_array.md) checks whether the JSON value is an array
+- [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

@@ -56,14 +56,13 @@ This library extends primitive types to binary types, because binary types are r

 ## See also

- [`is_structured()`](is_structured.md) - returns whether the JSON value is structured
- [`is_null()`](is_null.md) - returns whether the JSON value is `null`
- [`is_string()`](is_string.md) - returns whether the JSON value is a string
- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [is_structured()](is_structured.md) returns whether the JSON value is structured
+- [is_null()](is_null.md) returns whether the JSON value is `null`
+- [is_string()](is_string.md) returns whether the JSON value is a string
+- [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

@@ -36,11 +36,10 @@ Constant.

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [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

@@ -54,11 +54,10 @@ Note that though strings are containers in C++, they are treated as primitive va

 ## See also

- [`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
- [Types](../../features/types/index.md) - the JSON value types and how they are stored
+- [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

@@ -54,7 +54,7 @@ using element_type = decltype(*j_object.items().begin());
 ```

 The per-element type (`iteration_proxy_value`) lives in the library's internal `detail` namespace and is
-intentionally unspecified as a stable, named type — `decltype` is the supported way to obtain it, but its exact
+intentionally unspecified as a stable, named type -- `decltype` is the supported way to obtain it, but its exact
 name/definition may change between versions.

 ## Return value
@@ -97,16 +97,15 @@ When iterating over an array, `key()` will return the index of the element as st

 ## See also

- [`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; document order, not sorted; duplicate keys are visited)
- [Iterators](../../features/iterators.md#access-object-keys-during-iteration) - the article on iterating over keys and values
+- [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

- Added in version 3.1.0 as the replacement of the static function `iterator_wrapper`, which was available since
-  version 1.0.0 and is deprecated since version 3.1.0.
+- Added `iterator_wrapper` in version 3.0.0.
+- Added `items` and deprecated `iterator_wrapper` in version 3.1.0.
 - Added structured binding support in version 3.5.0.

 !!! warning "Deprecation"
@@ -57,7 +57,7 @@ same name. Hidden members remain accessible via [`as_base_class`](as_base_class.

 ## See also

- [`as_base_class`](as_base_class.md) - access the custom base class
+- [as_base_class](as_base_class.md) - access the custom base class
 - [Template Parameter Requirements](../../features/types/template_parameters.md#custombaseclass) - the requirements for `CustomBaseClass`

 ## Version history
@@ -44,12 +44,11 @@ deserializes. See [Template Parameter Requirements](../../features/types/templat

 ## See also

- [`adl_serializer`](../adl_serializer/index.md) - the default `json_serializer`
- [`get`](get.md) - explicit type conversion using the `json_serializer`'s `from_json()` method
- [`get_to`](get_to.md) - explicit type conversion into a variable using the `json_serializer`'s `from_json()` method
+- [adl_serializer](../adl_serializer/index.md) the default `json_serializer`
+- [get](get.md) explicit type conversion using the `json_serializer`'s `from_json()` method
+- [get_to](get_to.md) explicit type conversion into a variable using the `json_serializer`'s `from_json()` method
 - [Arbitrary Type Conversions](../../features/arbitrary_types.md) - the article on converting between JSON values and arbitrary types
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `JSONSerializer` template parameter

 ## Version history

- Added in version 2.1.0.
+- Since version 2.0.0.
@@ -33,7 +33,7 @@ constant complexity.

 ## Notes

-This function does not return the maximal length of a string stored as JSON value — it returns the maximal number of
+This function does not return the maximal length of a string stored as JSON value -- it returns the maximal number of
 string elements the JSON value can store which is `1`.

 ## Examples
@@ -56,9 +56,9 @@ string elements the JSON value can store which is `1`.

 ## See also

- [`size`](size.md) - returns the number of elements
- [`array_t`](array_t.md) - the type used to store JSON arrays
- [`object_t`](object_t.md) - the type used to store JSON objects
+- [size](size.md) returns the number of elements
+- [array_t](array_t.md) the type used to store JSON arrays
+- [object_t](object_t.md) the type used to store JSON objects

 ## Version history

@@ -70,10 +70,9 @@ object operation (looking up a key, or adding one to the patch): logarithmic for

 ## See also

- [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396) - specification of JSON Merge Patch
- [`merge_patch`](merge_patch.md) - applies a JSON Merge Patch
- [`diff`](diff.md) - creates a diff as a JSON Patch
- [JSON Merge Patch](../../features/merge_patch.md) - the article on JSON Merge Patch
+- [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396)
+- [merge_patch](merge_patch.md) applies a JSON Merge Patch
+- [diff](diff.md) creates a diff as a JSON Patch

 ## Version history

@@ -39,33 +39,13 @@ Basic guarantee: if an exception is thrown during the operation, the JSON value

 ## Complexity

-Linear in the total number of values (including nested ones) in `apply_patch`, times the cost of a key-based object
-operation (looking up, adding, or erasing a member): logarithmic for [`json`](../json.md), and linear for
-[`ordered_json`](../ordered_json.md) (see [`ordered_map` complexity](../ordered_map.md#complexity)). For
-`ordered_json`, patching an object that has `n` members with a patch that has `m` members therefore takes O(n·m). The
-cost also includes one copy of `apply_patch` (see the notes below).
+Linear in the lengths of `apply_patch`.

 ## Notes

- `apply_patch` may be `#!cpp *this` itself or refer to a value contained in `#!cpp *this` (for example, a subobject
-  returned by `#!cpp (*this)[key]`); it is read as it was when `merge_patch()` was called, before any modification of
-  `#!cpp *this`. To make this possible, the function copies `apply_patch` before it modifies `#!cpp *this`, so the cost
-  includes one copy of the patch.
- A merge patch uses `#!json null` to remove a member, so it cannot set a member to `#!json null`: applying
-  `#!json {"a":null}` to `#!json {"a":1}` gives `#!json {}`.
- Arrays are not merged: an array in the patch replaces the target value as a whole, and a `#!json null` inside an
-  array is kept as an element. `#!json null` members of the target that the patch does not mention are preserved.
- A `#!json null` in the patch only removes a member; it does not prevent the creation of the enclosing objects.
-  Applying `#!json {"a":{"b":null}}` to `#!json {}` gives `#!json {"a":{}}` (see example 15 in Appendix A of the RFC).
- If `apply_patch` is not an object, it replaces the target as a whole. In particular, a `#!json null` patch turns the
-  target into `#!json null`. If `apply_patch` is an object and the target is not, the target is first replaced by an
-  empty object, so applying `#!json {}` to `#!json 1` gives `#!json {}`.
- A merge patch cannot express every change; for example, it cannot reorder array elements or remove a specific array
-  element. Use [JSON Patch](../../features/json_patch.md) ([RFC 6902](https://tools.ietf.org/html/rfc6902)) for that.
-  [`merge_diff`](merge_diff.md) has a matching limitation, see its notes.
- A [discarded](is_discarded.md) value is treated like any other non-object value: a discarded
-  `apply_patch` turns the target into a discarded value, and an object patch replaces a discarded target by an object
-  as described above.
+`apply_patch` may be `#!cpp *this` itself or refer to a value contained in `#!cpp *this` (for example, a subobject
+returned by `#!cpp (*this)[key]`); it is read as it was when `merge_patch()` was called, before any modification of
+`#!cpp *this`.

 ## Examples

@@ -85,13 +65,12 @@ cost also includes one copy of `apply_patch` (see the notes below).

 ## See also

- [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396) - specification of JSON Merge Patch
- [`patch`](patch.md) - apply a JSON patch
- [`merge_diff`](merge_diff.md) - creates a diff as a JSON Merge Patch
- [JSON Merge Patch](../../features/merge_patch.md) - the article on JSON Merge Patch
+- [RFC 7396 (JSON Merge Patch)](https://tools.ietf.org/html/rfc7396)
+- [patch](patch.md) apply a JSON patch
+- [merge_diff](merge_diff.md) creates a diff as a JSON Merge Patch

 ## Version history

- Added in version 3.1.0.
+- Added in version 3.0.0.
 - Fixed use of freed or relocated memory when `apply_patch` is `#!cpp *this` or refers to a value contained in
  `#!cpp *this`, in version 3.13.0.
@@ -48,11 +48,8 @@ Constant.

 ## See also

- [`NLOHMANN_JSON_VERSION_MAJOR`](../macros/nlohmann_json_version_major.md) /
-  [`NLOHMANN_JSON_VERSION_MINOR`](../macros/nlohmann_json_version_major.md) /
-  [`NLOHMANN_JSON_VERSION_PATCH`](../macros/nlohmann_json_version_major.md) - library version information
- [Integration](../../integration/index.md) - integrate the library
- [Supported Macros](../../features/macros.md) - guide to all supported macros
+- [**NLOHMANN_JSON_VERSION_MAJOR**/**NLOHMANN_JSON_VERSION_MINOR**/**NLOHMANN_JSON_VERSION_PATCH**](../macros/nlohmann_json_version_major.md)
+  \- library version information

 ## Version history

@@ -84,11 +84,10 @@ Floating-point number values are stored directly inside a `basic_json` type.

 ## See also

- [`number_integer_t`](number_integer_t.md) - the type used to store JSON integer numbers
- [`number_unsigned_t`](number_unsigned_t.md) - the type used to store JSON unsigned integer numbers
- [`is_number_float`](is_number_float.md) - checks whether the JSON value is a floating-point number
+- [number_integer_t](number_integer_t.md) the type used to store JSON integer numbers
+- [number_unsigned_t](number_unsigned_t.md) the type used to store JSON unsigned integer numbers
+- [is_number_float](is_number_float.md) checks whether the JSON value is a floating-point number
 - [Number Handling](../../features/types/number_handling.md) - the article on number handling
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the number template parameters

 ## Version history

@@ -80,11 +80,10 @@ Integer number values are stored directly inside a `basic_json` type.

 ## See also

- [`number_unsigned_t`](number_unsigned_t.md) - the type used to store JSON unsigned integer numbers
- [`number_float_t`](number_float_t.md) - the type used to store JSON floating-point numbers
- [`is_number_integer`](is_number_integer.md) - checks whether the JSON value is a signed integer number
+- [number_unsigned_t](number_unsigned_t.md) the type used to store JSON unsigned integer numbers
+- [number_float_t](number_float_t.md) the type used to store JSON floating-point numbers
+- [is_number_integer](is_number_integer.md) checks whether the JSON value is a signed integer number
 - [Number Handling](../../features/types/number_handling.md) - the article on number handling
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the number template parameters

 ## Version history

@@ -82,11 +82,10 @@ Integer number values are stored directly inside a `basic_json` type.

 ## See also

- [`number_integer_t`](number_integer_t.md) - the type used to store JSON integer numbers
- [`number_float_t`](number_float_t.md) - the type used to store JSON floating-point numbers
- [`is_number_unsigned`](is_number_unsigned.md) - checks whether the JSON value is an unsigned integer number
+- [number_integer_t](number_integer_t.md) the type used to store JSON integer numbers
+- [number_float_t](number_float_t.md) the type used to store JSON floating-point numbers
+- [is_number_unsigned](is_number_unsigned.md) checks whether the JSON value is an unsigned integer number
 - [Number Handling](../../features/types/number_handling.md) - the article on number handling
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the number template parameters

 ## Version history

@@ -27,10 +27,8 @@ and [`default_object_comparator_t`](default_object_comparator_t.md) otherwise.

 ## See also

- [`object_t`](object_t.md) - the type used to store JSON objects
- [`default_object_comparator_t`](default_object_comparator_t.md) - the fallback comparator used when `object_t` has no `key_compare` member type
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `ObjectType` template parameter
- [Object order](../../features/object_order.md) - preserve the insertion order of keys
+- [object_t](object_t.md) the type used to store JSON objects
+- [default_object_comparator_t](default_object_comparator_t.md) the fallback comparator used when `object_t` has no `key_compare` member type

 ## Version history

@@ -20,7 +20,7 @@ To store objects in C++, a type is defined by the template parameters described
 `ObjectType`
 :   the container to store objects. Its template parameters must have the same order and meaning as those of
    `std::map`; in particular, the third parameter is a comparator. `#!cpp std::unordered_map`, whose third parameter
-    is a hash function, therefore needs an adapter — see
+    is a hash function, therefore needs an adapter -- see
    [Template Parameter Requirements](../../features/types/template_parameters.md#objecttype) for the full list of
    requirements, an adapter example, and the containers that are known to work.

@@ -125,12 +125,10 @@ the object is silently converted as an array of key-value pairs, which is incorr

 ## See also

- [`array_t`](array_t.md) - the type used to store JSON arrays
- [`string_t`](string_t.md) - the type used to store JSON strings
- [`object_comparator_t`](object_comparator_t.md) - the comparator used to order object keys
+- [array_t](array_t.md) the type used to store JSON arrays
+- [string_t](string_t.md) the type used to store JSON strings
+- [object_comparator_t](object_comparator_t.md) the comparator used to order object keys
 - [Object Order](../../features/object_order.md) - the article on object key ordering
- [Types](../../features/types/index.md) - how objects are stored
- [Template Parameter Requirements](../../features/types/template_parameters.md) - requirements on the `ObjectType` template parameter

 ## Version history

@@ -123,12 +123,11 @@ interpreted as `object_t::value_type` or `std::initializer_list<basic_json>`, se

 ## See also

- [`emplace_back`](emplace_back.md) - add a value to an array
- [`push_back`](push_back.md) - add a value to an array/object
- [Modifying values](../../features/modifying_values.md) - the article on modifying values
+- [emplace_back](emplace_back.md) add a value to an array
+- [push_back](push_back.md) add a value to an array/object

 ## Version history

-1. Added in version 1.0.0.
-2. Added in version 1.0.0.
-3. Added in version 2.0.0.
+1. Since version 1.0.0.
+2. Since version 1.0.0.
+3. Since version 2.0.0.
@@ -45,9 +45,8 @@ Linear.

 ## See also

- [`basic_json`](basic_json.md) - create a JSON value
- [`swap`](swap.md) - exchanges the contents of two JSON values
- [Creating JSON values](../../features/creating_values.md) - ways to create and assign JSON values
+- [basic_json](basic_json.md) create a JSON value
+- [swap](swap.md) exchanges the contents of two JSON values

 ## Version history