Address review comments on nested indefinite-length CBOR strings

Rename is_chunk to inside_indefinite, update the stale test section names, and use lowercase comments like the surrounding code. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
fix(cbor): reject nested indefinite string chunks
2026-10-06 14:40:32 +00:00 · 2026-10-06 08:29:13 +02:00 · 2026-10-06 08:29:05 +02:00 · 2026-10-06 07:46:24 +02:00 · 2026-10-06 07:40:39 +02:00 · 2026-10-06 07:33:34 +02:00
218 changed files with 12553 additions and 13347 deletions
@@ -16,6 +16,9 @@ only_commits:

 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.
    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
      configuration: Debug
      platform: x86
@@ -34,7 +37,13 @@ environment:
      configuration: Release
      platform: x86
      CXX_FLAGS: "/permissive- /std:c++17 /utf-8 /W4 /WX"
-      CMAKE_OPTIONS: ""
+      CMAKE_OPTIONS: "-DJSON_TestStandards=17 -DJSON_TestShard=0/2"
+      GENERATOR: Visual Studio 15 2017
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      configuration: Release
+      platform: x86
+      CXX_FLAGS: "/permissive- /std:c++17 /utf-8 /W4 /WX"
+      CMAKE_OPTIONS: "-DJSON_TestStandards=17 -DJSON_TestShard=1/2"
      GENERATOR: Visual Studio 15 2017

    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
@@ -55,7 +64,13 @@ environment:
      configuration: Release
      platform: x64
      CXX_FLAGS: "/permissive- /std:c++17 /Zc:__cplusplus /utf-8 /W4 /WX"
-      CMAKE_OPTIONS: ""
+      CMAKE_OPTIONS: "-DJSON_TestStandards=17 -DJSON_TestShard=0/2"
+      GENERATOR: Visual Studio 15 2017
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      configuration: Release
+      platform: x64
+      CXX_FLAGS: "/permissive- /std:c++17 /Zc:__cplusplus /utf-8 /W4 /WX"
+      CMAKE_OPTIONS: "-DJSON_TestStandards=17 -DJSON_TestShard=1/2"
      GENERATOR: Visual Studio 15 2017

 init:
@@ -66,7 +81,7 @@ install:
  - if "%platform%"=="x86"    set GENERATOR_PLATFORM=Win32

 before_build:
-  - cmake . -G "%GENERATOR%" -A "%GENERATOR_PLATFORM%" -DCMAKE_CXX_FLAGS="%CXX_FLAGS%" -DCMAKE_IGNORE_PATH="C:/Program Files/Git/usr/bin" -DJSON_BuildTests=On "%CMAKE_OPTIONS%"
+  - cmake . -G "%GENERATOR%" -A "%GENERATOR_PLATFORM%" -DCMAKE_CXX_FLAGS="%CXX_FLAGS%" -DCMAKE_IGNORE_PATH="C:/Program Files/Git/usr/bin" -DJSON_BuildTests=On %CMAKE_OPTIONS%

 build_script:
  - cmake --build . --config "%configuration%" --parallel 2
@@ -45,23 +45,6 @@ labels:
 - label: "aspect: binary formats"
  title: "(?i)(bson|cbor|msgpack|messagepack|ubjson|bjdata|bon8|binary format)"

- label: "aspect: json_view"
-  files:
-    - "include/nlohmann/json_view\\.hpp"
-    - "include/nlohmann/detail/view/.*"
-    - "single_include/nlohmann/json_view\\.hpp"
-    - "tests/src/unit-json_view.*"
-    - "tests/src/fuzzer-parse_json_view\\.cpp"
-    - "tools/amalgamate/config_json_view\\.json"
-    - "docs/mkdocs/docs/features/json_view\\.md"
-    - "docs/mkdocs/docs/api/basic_json_(document|view)/.*"
-    - "docs/mkdocs/docs/api/(ordered_)?json_(document|view)\\.md"
-    - "docs/mkdocs/docs/examples/(basic_json_(document|view)__|(ordered_)?json_(document|view)).*"
-    - "tests/benchmarks/src/benchmarks_view\\.cpp"
-
- label: "aspect: json_view"
-  title: "(?i)(json_view|json_document|zero-copy)"
-
 - label: "python"
  files:
    - "\\.py$"
@@ -118,15 +118,12 @@ jobs:
          python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json.json -s .
          python3 $TOOL_DIR/amalgamate.py -c $TOOL_DIR/config_json_fwd.json -s .
          cp include/nlohmann/json_literals.hpp $INCLUDE_DIR/json_literals.hpp
-          # the configuration of json_view.hpp comes with the pull request until
-          # it is on develop; the tool itself is still develop's
-          python3 $TOOL_DIR/amalgamate.py -c $MAIN_DIR/tools/amalgamate/config_json_view.json -s .

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

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

          # fail loudly if a directory is renamed or removed: find would only warn
          # about the missing path and silently drop its files from the check
@@ -17,11 +17,11 @@ permissions:
  contents: read

 jobs:
-  macos-14:
-    runs-on: macos-14 # https://github.com/actions/runner-images/blob/main/images/macos/macos-14-Readme.md
+  macos-15:
+    runs-on: macos-15 # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
    strategy:
      matrix:
-        xcode: ['15.0.1', '15.1', '15.2', '15.3', '15.4']
+        xcode: ['16.0', '16.1', '16.2', '16.3', '16.4', '26.0.1', '26.1.1', '26.2', '26.3']
    env:
      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer

@@ -36,11 +36,11 @@ jobs:
      - name: Test
        run: cd build ; ctest -j 10 --output-on-failure

-  macos-15:
-    runs-on: macos-15 # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
+  macos-26:
+    runs-on: macos-26 # https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md
    strategy:
      matrix:
-        xcode: ['16.0', '16.1', '16.2', '16.3', '16.4', '26.0.1']
+        xcode: ['26.4.1', '26.5', '26.6']
    env:
      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode }}.app/Contents/Developer

@@ -107,7 +107,7 @@ jobs:
    container: ubuntu:24.04
    strategy:
      matrix:
-        target: [ci_cmake_flags, ci_test_diagnostics, ci_test_diagnostic_positions, ci_test_noexceptions, ci_test_noimplicitconversions, ci_test_legacycomparison, ci_test_noglobaludls, ci_test_disableenumserialization, ci_test_disabletuplereferenceconversion, ci_test_skiplibraryversioncheck, ci_test_simdutf, ci_test_strict_nul_handling, ci_test_no_thread_local]
+        target: [ci_cmake_flags, ci_test_diagnostics, ci_test_diagnostic_positions, ci_test_noexceptions, ci_test_noimplicitconversions, ci_test_legacycomparison, ci_test_noglobaludls, ci_test_disableenumserialization, ci_test_disabletuplereferenceconversion, ci_test_skiplibraryversioncheck, ci_test_simdutf, ci_test_strict_nul_handling, ci_test_delete_deprecated_functions, ci_test_no_thread_local]
    steps:
      - name: Install build-essential
        run: apt-get update ; apt-get install -y build-essential unzip wget git
@@ -209,7 +209,7 @@ jobs:
    strategy:
      matrix:
        # older GCC docker images (4, 5, 6) fail to check out code
-        compiler: ['7', '8', '9', '10', '11', '12', '13', '14', '15', 'latest']
+        compiler: ['7', '8', '9', '10', '11', '12', '13', '14', '15', '16', 'latest']
    container: gcc:${{ matrix.compiler }}
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -20,7 +20,6 @@ cc_library(
    hdrs = [
        "include/nlohmann/adl_serializer.hpp",
        "include/nlohmann/byte_container_with_subtype.hpp",
-        "include/nlohmann/detail/abi_config.hpp",
        "include/nlohmann/detail/abi_macros.hpp",
        "include/nlohmann/detail/bit_ops.hpp",
        "include/nlohmann/detail/conversions/from_json.hpp",
@@ -66,21 +65,9 @@ cc_library(
        "include/nlohmann/detail/string_escape.hpp",
        "include/nlohmann/detail/string_utils.hpp",
        "include/nlohmann/detail/value_t.hpp",
-        "include/nlohmann/detail/view/builder.hpp",
-        "include/nlohmann/detail/view/document_data.hpp",
-        "include/nlohmann/detail/view/errors.hpp",
-        "include/nlohmann/detail/view/input.hpp",
-        "include/nlohmann/detail/view/macro_scope.hpp",
-        "include/nlohmann/detail/view/macro_unscope.hpp",
-        "include/nlohmann/detail/view/materialize.hpp",
-        "include/nlohmann/detail/view/node.hpp",
-        "include/nlohmann/detail/view/number.hpp",
-        "include/nlohmann/detail/view/scan.hpp",
-        "include/nlohmann/detail/view/string_ref.hpp",
        "include/nlohmann/json.hpp",
        "include/nlohmann/json_fwd.hpp",
        "include/nlohmann/json_literals.hpp",
-        "include/nlohmann/json_view.hpp",
        "include/nlohmann/ordered_map.hpp",
        "include/nlohmann/thirdparty/hedley/hedley.hpp",
        "include/nlohmann/thirdparty/hedley/hedley_undef.hpp",
@@ -93,7 +80,6 @@ cc_library(
    name = "singleheader-json",
    hdrs = [
        "single_include/nlohmann/json.hpp",
-        "single_include/nlohmann/json_view.hpp",
    ],
    includes = ["single_include"],
    visibility = ["//visibility:public"],
@@ -62,6 +62,7 @@ option(JSON_MultipleHeaders                "Use non-amalgamated version of the l
 option(JSON_SystemInclude                  "Include as system headers (skip for clang-tidy)." OFF)
 option(JSON_StrictNulHandling              "Build with strict NUL-byte handling enabled." OFF)
 option(JSON_StrictBinaryUTF8               "Build with UTF-8 checks in the CBOR, UBJSON, BJData, and BSON writers enabled." OFF)
+option(JSON_DeleteDeprecatedFunctions      "Delete the deprecated functions instead of only deprecating them." OFF)

 if (JSON_CI)
    include(ci)
@@ -123,6 +124,10 @@ if (JSON_StrictBinaryUTF8)
    message(STATUS "Strict UTF-8 checks in binary writers enabled (JSON_STRICT_BINARY_UTF8=1)")
 endif()

+if (JSON_DeleteDeprecatedFunctions)
+    message(STATUS "Deprecated functions are deleted (JSON_DELETE_DEPRECATED_FUNCTIONS=1)")
+endif()
+
 if (JSON_Diagnostic_Positions)
    message(STATUS "Diagnostic positions enabled (JSON_DIAGNOSTIC_POSITIONS=1)")
 endif()
@@ -159,6 +164,7 @@ target_compile_definitions(
    $<$<BOOL:${JSON_LegacyDiscardedValueComparison}>:JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON=1>
    $<$<BOOL:${JSON_StrictNulHandling}>:JSON_STRICT_NUL_HANDLING=1>
    $<$<BOOL:${JSON_StrictBinaryUTF8}>:JSON_STRICT_BINARY_UTF8=1>
+    $<$<BOOL:${JSON_DeleteDeprecatedFunctions}>:JSON_DELETE_DEPRECATED_FUNCTIONS=1>
 )

 target_include_directories(
@@ -23,7 +23,6 @@ AMALGAMATED_FILE=single_include/nlohmann/json.hpp
 AMALGAMATED_FWD_FILE=single_include/nlohmann/json_fwd.hpp
 # json_literals.hpp only includes <nlohmann/json.hpp>, so it is copied verbatim
 AMALGAMATED_LITERALS_FILE=single_include/nlohmann/json_literals.hpp
-AMALGAMATED_VIEW_FILE=single_include/nlohmann/json_view.hpp

 # the header with the argument-counting macros generated by tools/macro_builder
 MACRO_SCOPE_HPP=include/nlohmann/detail/macro_scope.hpp
@@ -35,7 +34,7 @@ MACRO_SCOPE_HPP=include/nlohmann/detail/macro_scope.hpp

 # main target
 all:
-	@echo "amalgamate - amalgamate files single_include/nlohmann/json{,_fwd,_literals,_view}.hpp from the include/nlohmann sources"
+	@echo "amalgamate - amalgamate files single_include/nlohmann/json{,_fwd,_literals}.hpp from the include/nlohmann sources"
 	@echo "BUILD.bazel - regenerate the Bazel BUILD file from the include/nlohmann sources"
 	@echo "ChangeLog.md - generate ChangeLog file"
 	@echo "check-amalgamation - check whether sources have been amalgamated and BUILD.bazel is up to date"
@@ -88,10 +87,10 @@ install_astyle:

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

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

 # call the amalgamation tool for json.hpp
@@ -106,9 +105,6 @@ $(AMALGAMATED_FWD_FILE): $(SRCS)
 $(AMALGAMATED_LITERALS_FILE): include/nlohmann/json_literals.hpp
 	cp include/nlohmann/json_literals.hpp $(AMALGAMATED_LITERALS_FILE)

-# call the amalgamation tool for json_view.hpp (keeps including json.hpp)
-$(AMALGAMATED_VIEW_FILE): $(SRCS)
-	tools/amalgamate/amalgamate.py -c tools/amalgamate/config_json_view.json -s . --verbose=yes
 # regenerate nlohmann_json.natvis from the ABI tags and version in include/nlohmann/detail/abi_macros.hpp
 natvis:
 	python3 tools/generate_natvis/generate_natvis.py .
@@ -133,16 +129,13 @@ check-amalgamation:
 	@mv $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~
 	@mv $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~
 	@mv $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~
-	@mv $(AMALGAMATED_VIEW_FILE) $(AMALGAMATED_VIEW_FILE)~
 	@$(MAKE) amalgamate
 	@diff $(AMALGAMATED_FILE) $(AMALGAMATED_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE) ; false)
 	@diff $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_FWD_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE) ; false)
 	@diff $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_LITERALS_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE) ; false)
-	@diff $(AMALGAMATED_VIEW_FILE) $(AMALGAMATED_VIEW_FILE)~ || (echo "===================================================================\n  Amalgamation required! Please read the contribution guidelines\n  in file .github/CONTRIBUTING.md.\n===================================================================" ; mv $(AMALGAMATED_VIEW_FILE)~ $(AMALGAMATED_VIEW_FILE) ; false)
 	@mv $(AMALGAMATED_FILE)~ $(AMALGAMATED_FILE)
 	@mv $(AMALGAMATED_FWD_FILE)~ $(AMALGAMATED_FWD_FILE)
 	@mv $(AMALGAMATED_LITERALS_FILE)~ $(AMALGAMATED_LITERALS_FILE)
-	@mv $(AMALGAMATED_VIEW_FILE)~ $(AMALGAMATED_VIEW_FILE)
 	@mv BUILD.bazel BUILD.bazel~
 	@$(MAKE) BUILD.bazel
 	@diff BUILD.bazel BUILD.bazel~ || (echo "===================================================================\n  BUILD.bazel is out of date! Please run 'make BUILD.bazel'.\n===================================================================" ; mv BUILD.bazel~ BUILD.bazel ; false)
@@ -188,7 +181,7 @@ json.tar.xz:
 # We use `-X` to make the resulting ZIP file reproducible, see
 # <https://content.pivotal.io/blog/barriers-to-deterministic-reproducible-zip-files>.
 include.zip: BUILD.bazel
-	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) $(AMALGAMATED_VIEW_FILE) BUILD.bazel MODULE.bazel meson.build LICENSE.MIT
+	zip -9 --recurse-paths -X include.zip $(SRCS) $(AMALGAMATED_FILE) $(AMALGAMATED_FWD_FILE) $(AMALGAMATED_LITERALS_FILE) BUILD.bazel MODULE.bazel meson.build LICENSE.MIT

 # Create the files for a release and add signatures and hashes.
 release: include.zip json.tar.xz
@@ -198,13 +191,11 @@ release: include.zip json.tar.xz
 	gpg --armor --detach-sig $(AMALGAMATED_FILE)
 	gpg --armor --detach-sig $(AMALGAMATED_FWD_FILE)
 	gpg --armor --detach-sig $(AMALGAMATED_LITERALS_FILE)
-	gpg --armor --detach-sig $(AMALGAMATED_VIEW_FILE)
 	gpg --armor --detach-sig json.tar.xz
 	cp $(AMALGAMATED_FILE) release_files
 	cp $(AMALGAMATED_FWD_FILE) release_files
 	cp $(AMALGAMATED_LITERALS_FILE) release_files
-	cp $(AMALGAMATED_VIEW_FILE) release_files
-	mv $(AMALGAMATED_FILE).asc $(AMALGAMATED_FWD_FILE).asc $(AMALGAMATED_LITERALS_FILE).asc $(AMALGAMATED_VIEW_FILE).asc json.tar.xz json.tar.xz.asc include.zip include.zip.asc release_files
+	mv $(AMALGAMATED_FILE).asc $(AMALGAMATED_FWD_FILE).asc $(AMALGAMATED_LITERALS_FILE).asc json.tar.xz json.tar.xz.asc include.zip include.zip.asc release_files
 	cd release_files ; shasum -a 256 $$(find . -type f -not -name '*.asc' | sed 's|^\./||' | sort) > hashes.txt


@@ -1187,14 +1187,6 @@ binary.set_subtype(0x10);
 auto cbor = json::to_msgpack(j); // 0xD5 (fixext2), 0x10, 0xCA, 0xFE
 ```

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

 The library is used in multiple projects, applications, operating systems, etc. The list below is not exhaustive, but the result of an internet search. If you know further customers of the library, please let me know, see [contact](#contact).
@@ -1401,8 +1393,7 @@ THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR I
 - The class contains a slightly modified version of the Grisu2 algorithm from Florian Loitsch which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above). Copyright &copy; 2009 [Florian Loitsch](https://florian.loitsch.com/)
 - The class contains a copy of [Hedley](https://nemequ.github.io/hedley/) from Evan Nemerson which is licensed as [CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/).
 - The class contains parts of [Google Abseil](https://github.com/abseil/abseil-cpp) which is licensed under the [Apache 2.0 License](https://opensource.org/licenses/Apache-2.0).
- The class contains an adapted version of the Eisel-Lemire algorithm, its table of powers of five, and its digit comparison for long numbers from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors
- The view's parser (`<nlohmann/json_view.hpp>`) contains techniques and code adapted from [yyjson](https://github.com/ibireme/yyjson) by YaoYuan, which is licensed under the [MIT License](https://opensource.org/licenses/MIT) (see above): table-driven decoding of `\u` escapes and fixed-offset unrolled checks.
+- The class contains an adapted version of the Eisel-Lemire algorithm and its table of powers of five from [fast_float](https://github.com/fastfloat/fast_float) by Daniel Lemire and contributors, which is available under the [MIT License](https://opensource.org/licenses/MIT) (used here), the Apache 2.0 License, and the Boost Software License. Copyright &copy; 2021 The fast_float authors

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

@@ -249,6 +249,20 @@ add_custom_target(ci_test_strict_nul_handling
    COMMENT "Compile and test with strict NUL-byte handling enabled"
 )

+###############################################################################
+# Delete the deprecated functions.
+###############################################################################
+
+add_custom_target(ci_test_delete_deprecated_functions
+    COMMAND ${CMAKE_COMMAND}
+    -DCMAKE_BUILD_TYPE=Debug -GNinja
+    -DJSON_BuildTests=ON -DJSON_FastTests=ON -DJSON_DeleteDeprecatedFunctions=ON
+    -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_delete_deprecated_functions
+    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_delete_deprecated_functions
+    COMMAND cd ${PROJECT_BINARY_DIR}/build_delete_deprecated_functions && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure
+    COMMENT "Compile and test with the deprecated functions deleted"
+)
+
 ###############################################################################
 # Disable global UDLs.
 ###############################################################################
@@ -362,7 +376,7 @@ add_custom_target(ci_test_coverage
 # Sanitizers.
 ###############################################################################

-set(CLANG_CXX_FLAGS_SANITIZER "-g -O1 -fsanitize=address -fsanitize=undefined -fsanitize=integer -fsanitize=nullability -fno-omit-frame-pointer -fno-sanitize-recover=all -fno-sanitize=unsigned-integer-overflow -fno-sanitize=unsigned-shift-base")
+set(CLANG_CXX_FLAGS_SANITIZER "-g -O1 -fsanitize=address -fsanitize=undefined -fsanitize=integer -fsanitize=nullability -fno-omit-frame-pointer -fno-sanitize-recover=all -fno-sanitize=unsigned-integer-overflow -fno-sanitize=unsigned-shift-base -fsanitize-ignorelist=${PROJECT_SOURCE_DIR}/cmake/clang_sanitizer_ignorelist.txt")

 add_custom_target(ci_test_clang_sanitizer
    COMMAND CXX=${CLANG_TOOL} CXXFLAGS=${CLANG_CXX_FLAGS_SANITIZER} ${CMAKE_COMMAND}
@@ -396,11 +410,10 @@ list(FILTER INDENT_FILES EXCLUDE REGEX "/tests/thirdparty/|/tests/abi/include/nl
 set(include_dir ${PROJECT_SOURCE_DIR}/single_include/nlohmann)
 set(tool_dir ${PROJECT_SOURCE_DIR}/tools/amalgamate)
 add_custom_target(ci_test_amalgamation
-    COMMAND rm -fr ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~ ${include_dir}/json_literals.hpp~ ${include_dir}/json_view.hpp~
+    COMMAND rm -fr ${include_dir}/json.hpp~ ${include_dir}/json_fwd.hpp~ ${include_dir}/json_literals.hpp~
    COMMAND cp ${include_dir}/json.hpp ${include_dir}/json.hpp~
    COMMAND cp ${include_dir}/json_fwd.hpp ${include_dir}/json_fwd.hpp~
    COMMAND cp ${include_dir}/json_literals.hpp ${include_dir}/json_literals.hpp~
-    COMMAND cp ${include_dir}/json_view.hpp ${include_dir}/json_view.hpp~
    COMMAND cp ${PROJECT_SOURCE_DIR}/BUILD.bazel ${PROJECT_SOURCE_DIR}/BUILD.bazel~

    COMMAND ${Python3_EXECUTABLE} -mvenv venv_astyle
@@ -410,14 +423,12 @@ add_custom_target(ci_test_amalgamation
    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json.json -s .
    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_fwd.json -s .
    COMMAND cp ${PROJECT_SOURCE_DIR}/include/nlohmann/json_literals.hpp ${include_dir}/json_literals.hpp
-    COMMAND ${Python3_EXECUTABLE} ${tool_dir}/amalgamate.py -c ${tool_dir}/config_json_view.json -s .
-    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp ${include_dir}/json_view.hpp
+    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=none ${include_dir}/json.hpp ${include_dir}/json_fwd.hpp
    COMMAND ${CMAKE_COMMAND} -P ${PROJECT_SOURCE_DIR}/cmake/scripts/gen_bazel_build_file.cmake

    COMMAND diff ${include_dir}/json.hpp~ ${include_dir}/json.hpp
    COMMAND diff ${include_dir}/json_fwd.hpp~ ${include_dir}/json_fwd.hpp
    COMMAND diff ${include_dir}/json_literals.hpp~ ${include_dir}/json_literals.hpp
-    COMMAND diff ${include_dir}/json_view.hpp~ ${include_dir}/json_view.hpp
    COMMAND diff ${PROJECT_SOURCE_DIR}/BUILD.bazel~ ${PROJECT_SOURCE_DIR}/BUILD.bazel

    COMMAND venv_astyle/bin/astyle --project=tools/astyle/.astylerc --suffix=orig ${INDENT_FILES}
@@ -708,7 +719,7 @@ ci_get_cmake(4.0.0  CMAKE_4_0_0_BINARY)
 # the tests require CMake 3.13 or later, so they are excluded for CMake 3.5.0
 set(JSON_CMAKE_FLAGS_3_5_0 JSON_Diagnostics JSON_Diagnostic_Positions JSON_GlobalUDLs JSON_ImplicitConversions JSON_DisableEnumSerialization
    JSON_LegacyDiscardedValueComparison JSON_Install JSON_MultipleHeaders JSON_SystemInclude JSON_Valgrind
-    JSON_StrictNulHandling JSON_StrictBinaryUTF8)
+    JSON_StrictNulHandling JSON_StrictBinaryUTF8 JSON_DeleteDeprecatedFunctions)
 set(JSON_CMAKE_FLAGS_3_31_6 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})
 set(JSON_CMAKE_FLAGS_4_0_0 JSON_BuildTests ${JSON_CMAKE_FLAGS_3_5_0})

@@ -0,0 +1,8 @@
+# Sanitizer ignore list for ci_test_clang_sanitizer (-fsanitize-ignorelist).
+#
+# libstdc++ 14's <format> declares `_Scanner(basic_string_view<_CharT>, size_t __nargs = -1)`, so every std::format
+# call converts -1 to size_t, which -fsanitize=integer reports as implicit-integer-sign-change. This is
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119429, not a bug in this library. Only that check and only <format> are
+# excluded, so implicit sign changes in the library and the tests are still reported.
+[implicit-integer-sign-change]
+src:*/include/c++/*/format
@@ -48,7 +48,6 @@ cc_library(
    name = "singleheader-json",
    hdrs = [
        "single_include/nlohmann/json.hpp",
-        "single_include/nlohmann/json_view.hpp",
    ],
    includes = ["single_include"],
    visibility = ["//visibility:public"],
@@ -132,43 +132,7 @@ INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::to_ubjson', 'Func
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::value', 'Method', 'api/basic_json/value/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::value_t', 'Enum', 'api/basic_json/value_t/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('basic_json::~basic_json', 'Method', 'api/basic_json/~basic_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document', 'Class', 'api/basic_json_document/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::basic_json_document', 'Constructor', 'api/basic_json_document/basic_json_document/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::accept', 'Function', 'api/basic_json_document/accept/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::is_discarded', 'Method', 'api/basic_json_document/is_discarded/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::memory_usage', 'Method', 'api/basic_json_document/memory_usage/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::node_count', 'Method', 'api/basic_json_document/node_count/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::owns_source', 'Method', 'api/basic_json_document/owns_source/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::parse', 'Function', 'api/basic_json_document/parse/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::parse_copy', 'Function', 'api/basic_json_document/parse_copy/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::read', 'Method', 'api/basic_json_document/read/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::root', 'Method', 'api/basic_json_document/root/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::shrink_to_fit', 'Method', 'api/basic_json_document/shrink_to_fit/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_document::source', 'Method', 'api/basic_json_document/source/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view', 'Class', 'api/basic_json_view/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::basic_json_view', 'Constructor', 'api/basic_json_view/basic_json_view/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::empty', 'Method', 'api/basic_json_view/empty/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_array', 'Method', 'api/basic_json_view/is_array/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_binary', 'Method', 'api/basic_json_view/is_binary/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_boolean', 'Method', 'api/basic_json_view/is_boolean/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_discarded', 'Method', 'api/basic_json_view/is_discarded/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_null', 'Method', 'api/basic_json_view/is_null/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_number', 'Method', 'api/basic_json_view/is_number/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_number_float', 'Method', 'api/basic_json_view/is_number_float/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_number_integer', 'Method', 'api/basic_json_view/is_number_integer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_number_unsigned', 'Method', 'api/basic_json_view/is_number_unsigned/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_object', 'Method', 'api/basic_json_view/is_object/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_primitive', 'Method', 'api/basic_json_view/is_primitive/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_string', 'Method', 'api/basic_json_view/is_string/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::is_structured', 'Method', 'api/basic_json_view/is_structured/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::materialize', 'Method', 'api/basic_json_view/materialize/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::operator bool', 'Method', 'api/basic_json_view/operator_bool/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::size', 'Method', 'api/basic_json_view/size/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::source_offset', 'Method', 'api/basic_json_view/source_offset/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('basic_json_view::type', 'Method', 'api/basic_json_view/type/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('json', 'Class', 'api/json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_document', 'Class', 'api/json_document/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('json_view', 'Class', 'api/json_view/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer', 'Class', 'api/json_pointer/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::back', 'Method', 'api/json_pointer/back/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('json_pointer::empty', 'Method', 'api/json_pointer/empty/index.html');
@@ -206,8 +170,6 @@ INSERT INTO searchIndex(name, type, path) VALUES ('operator""_json_pointer', 'Li
 INSERT INTO searchIndex(name, type, path) VALUES ('operator<<', 'Operator', 'api/operator_ltlt/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('operator>>', 'Operator', 'api/operator_gtgt/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('ordered_json', 'Class', 'api/ordered_json/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('ordered_json_document', 'Class', 'api/ordered_json_document/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('ordered_json_view', 'Class', 'api/ordered_json_view/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('ordered_map', 'Class', 'api/ordered_map/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('std::formatter<basic_json>', 'Class', 'api/basic_json/std_formatter/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('std::hash<basic_json>', 'Class', 'api/basic_json/std_hash/index.html');
@@ -238,7 +200,6 @@ INSERT INTO searchIndex(name, type, path) VALUES ('Iterators', 'Guide', 'feature
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON Merge Patch', 'Guide', 'features/merge_patch/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON Patch and Diff', 'Guide', 'features/json_patch/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON Pointer', 'Guide', 'features/json_pointer/index.html');
-INSERT INTO searchIndex(name, type, path) VALUES ('Zero-copy JSON views', 'Guide', 'features/json_view/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('nlohmann Namespace', 'Guide', 'features/namespace/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Types', 'Guide', 'features/types/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Types: Number Handling', 'Guide', 'features/types/number_handling/index.html');
@@ -258,6 +219,7 @@ INSERT INTO searchIndex(name, type, path) VALUES ('Supported Macros', 'Guide', '
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_ASSERT', 'Macro', 'api/macros/json_assert/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_BRACE_INIT_COPY_SEMANTICS', 'Macro', 'api/macros/json_brace_init_copy_semantics/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_CATCH_USER', 'Macro', 'api/macros/json_throw_user/index.html');
+INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DELETE_DEPRECATED_FUNCTIONS', 'Macro', 'api/macros/json_delete_deprecated_functions/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DIAGNOSTICS', 'Macro', 'api/macros/json_diagnostics/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DIAGNOSTIC_POSITIONS', 'Macro', 'api/macros/json_diagnostic_positions/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_DISABLE_ENUM_SERIALIZATION', 'Macro', 'api/macros/json_disable_enum_serialization/index.html');
@@ -288,6 +250,7 @@ INSERT INTO searchIndex(name, type, path) VALUES ('JSON_TRY_USER', 'Macro', 'api
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_GLOBAL_UDLS', 'Macro', 'api/macros/json_use_global_udls/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_IMPLICIT_CONVERSIONS', 'Macro', 'api/macros/json_use_implicit_conversions/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON', 'Macro', 'api/macros/json_use_legacy_discarded_value_comparison/index.html');
+INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS', 'Macro', 'api/macros/json_use_objects_for_enum_keyed_maps/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('JSON_USE_SIMDUTF', 'Macro', 'api/macros/json_use_simdutf/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('Macros', 'Macro', 'api/macros/index.html');
 INSERT INTO searchIndex(name, type, path) VALUES ('NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE', 'Macro', 'api/macros/nlohmann_define_derived_type/index.html');
@@ -8,7 +8,7 @@ static basic_json diff(const basic_json& source,
 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 always `#!cpp true`:
+For two JSON values `source` and `target`, the following code always yields `#!cpp true`:
 ```cpp
 source.patch(diff(source, target)) == target;
 ```
@@ -27,7 +27,7 @@ a JSON patch to convert the `source` to `target`

 ## Exception safety

-Strong guarantee: if an exception is thrown, there are no changes in the JSON value.
+Strong guarantee: `source` and `target` are never modified.

 ## Complexity

@@ -64,7 +64,6 @@ itself is empty which is `#!cpp false` in the case of a string.

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

 ## Version history

@@ -120,3 +120,12 @@ Linear in the size of the input.
 - Extended container support (1) to include types with lvalue-only ADL `begin`/`end` (matching `std::begin`/`std::end` semantics) in version 3.13.0.
 - Extended overload (2) to accept heterogeneous iterator+sentinel pairs (C++20 ranges support) in version 3.13.0.
 - Added `error_handler` parameter in version 3.13.0.
+
+!!! warning "Deprecation"
+
+    - Overload (2) replaces calls to `from_bjdata` with a pointer and a length as first two parameters, which has been
+      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      `#!cpp from_bjdata(ptr, len, ...);` with `#!cpp from_bjdata(ptr, ptr+len, ...);`.
+
+    You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
+    function.
@@ -106,3 +106,12 @@ Linear in the size of the input.
 ## Version history

 - Added in version 3.13.0.
+
+!!! warning "Deprecation"
+
+    - Overload (2) replaces calls to `from_bon8` with a pointer and a length as first two parameters, which has been
+      deprecated in version 3.13.0. This overload will be removed in version 4.0.0. Please replace all calls like
+      `#!cpp from_bon8(ptr, len, ...);` with `#!cpp from_bon8(ptr, ptr+len, ...);`.
+
+    You should be warned by your compiler with a `-Wdeprecated-declarations` warning if you are using a deprecated
+    function.
@@ -40,7 +40,6 @@ Constant.
 - [is_structured](is_structured.md) checks whether the JSON value is structured (array or object)
 - [type](type.md) returns the type of the JSON value
 - [array_t](array_t.md) the type used to store JSON arrays
- [basic_json_view::is_array](../basic_json_view/is_array.md) - the same check on a zero-copy view

 ## Version history

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

 ## Version history

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

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

 ## Version history

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

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

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

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

 ## Version history

@@ -23,10 +23,9 @@ type to use.
 ## Template parameters

 `NumberFloatType`
-:   the type to store floating-point numbers. The parser converts `#!cpp float`, `#!cpp double`, and a
-    `#!cpp long double` that is IEEE 754 binary64 itself and other `#!cpp long double` formats with
-    `#!cpp std::from_chars` or `#!cpp std::strtold`, and serialization falls back to `#!cpp std::snprintf`, so the
-    type must be `#!cpp float`, `#!cpp double`, or `#!cpp long double`. The
+:   the type to store floating-point numbers. Parsing and serialization are implemented in terms of
+    `#!cpp std::strtof`/`#!cpp std::strtod`/`#!cpp std::strtold` and `#!cpp std::snprintf`, so the type must be
+    `#!cpp float`, `#!cpp double`, or `#!cpp long double`. The
    [binary formats](../../features/binary_formats/index.md) additionally require `#!cpp float` or `#!cpp double`,
    because they have no encoding for `#!cpp long double`. See
    [Template Parameter Requirements](../../features/types/template_parameters.md#numberfloattype).
@@ -56,6 +55,10 @@ This implementation does exactly follow this approach, as it uses double precisi
 smaller than `-1.79769313486232e+308` and values greater than `1.79769313486232e+308` will be stored as NaN internally
 and be serialized to `null`.

+During deserialization (from JSON text or any of the binary formats), a finite number that does not fit into
+`number_float_t` is rejected with [`out_of_range.406`](../../home/exceptions.md#jsonexceptionout_of_range406), for
+example a double-precision number in a binary format when `number_float_t` is `#!cpp float`.
+
 ### Storage

 Floating-point number values are stored directly inside a `basic_json` type.
@@ -47,8 +47,9 @@ With the default values for `NumberIntegerType` (`std::int64_t`), the default va

 When the default type is used, the maximal integer number that can be stored is `9223372036854775807` (INT64_MAX) and
 the minimal integer number that can be stored is `-9223372036854775808` (INT64_MIN). Integer numbers that are out of
-range will yield over/underflow when used in a constructor. During deserialization, too large or small integer numbers
-will automatically be stored as [`number_unsigned_t`](number_unsigned_t.md) or [`number_float_t`](number_float_t.md).
+range will yield over/underflow when used in a constructor. During deserialization (from JSON text or any of the binary
+formats), too large or small integer numbers will automatically be stored as [`number_unsigned_t`](number_unsigned_t.md)
+or [`number_float_t`](number_float_t.md).

 [RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
 > Note that when such software is used, numbers that are integers and are in the range [-2<sup>53</sup>+1, 2<sup>53</sup>-1] are
@@ -48,8 +48,9 @@ With the default values for `NumberUnsignedType` (`std::uint64_t`), the default

 When the default type is used, the maximal integer number that can be stored is `18446744073709551615` (UINT64_MAX) and
 the minimal integer number that can be stored is `0`. Integer numbers that are out of range will yield over/underflow
-when used in a constructor. During deserialization, too large or small integer numbers will automatically be stored
-as [`number_integer_t`](number_integer_t.md) or [`number_float_t`](number_float_t.md).
+when used in a constructor. During deserialization (from JSON text or any of the binary formats), too large or small
+integer numbers will automatically be stored as [`number_integer_t`](number_integer_t.md) or
+[`number_float_t`](number_float_t.md).

 [RFC 8259](https://tools.ietf.org/html/rfc8259) further states:
 > Note that when such software is used, numbers that are integers and are in the range [-2<sup>53</sup>+1, 2<sup>53</sup>-1] are
@@ -55,7 +55,6 @@ JSON value which is `1` in the case of a string.

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

 ## Version history

@@ -68,6 +68,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key in `j` is
  not valid UTF-8 and `error_handler` is `strict` (the default only if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled)
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if `j` or a value nested in it is
+  discarded; example: `"cannot serialize discarded value to BJData"`

 ## Complexity

@@ -119,4 +121,6 @@ Linear in the size of the JSON value `j`.
 - BJData version parameter (for draft3 binary encoding) added in version 3.12.0.
 - Added `error_handler` parameter in version 3.13.0. Its default, `keep`, writes the bytes of a string or object key
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
-  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
+  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
+- Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
+  array or object was silently skipped, producing invalid BJData.
@@ -58,6 +58,9 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key is
  not valid UTF-8 and `error_handler` is `strict` (the default only if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled)
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if a value nested in `j` is discarded
+  (the top-level value itself is covered by `type_error.317` above, since it must be an object); example:
+  `"cannot serialize discarded value to BSON"`

 ## Complexity

@@ -110,6 +113,8 @@ pass before anything is written.
 - Throws `out_of_range.412` and `out_of_range.415` since version 3.13.0.
 - Linear in the size of `j`, and no longer limited by the call stack for deeply nested values, since version 3.13.0.
 - `out_of_range.415` is now detected before anything is written, like the other exceptions above, since version 3.13.0.
+- Throws `type_error.321` for a discarded value nested in `j` since version 3.13.0; previously, it was silently
+  skipped, producing a document whose declared size did not match what was actually written.
 - Added `error_handler` parameter in version 3.13.0. Its default, `keep`, writes the bytes of a string or object key
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316` before anything
@@ -49,6 +49,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key in `j` is
  not valid UTF-8 and `error_handler` is `strict` (the default only if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled)
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if `j` or a value nested in it is
+  discarded; example: `"cannot serialize discarded value to CBOR"`

 ## Complexity

@@ -86,3 +88,5 @@ Linear in the size of the JSON value `j`.
 - Added `error_handler` parameter in version 3.13.0. Its default, `keep`, writes the bytes of a string or object key
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
+- Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
+  array or object was silently skipped, producing invalid CBOR.
@@ -54,6 +54,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
  `"subtype 70000 is too large for the MessagePack ext type (max 255)"`
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key in `j` is
  not valid UTF-8 and `error_handler` is `strict`
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if `j` or a value nested in it is
+  discarded; example: `"cannot serialize discarded value to MessagePack"`

 ## Complexity

@@ -108,3 +110,5 @@ Linear in the size of the JSON value `j`.
 - Fixed in version 3.13.0 to serialize `number_integer_t`/`number_unsigned_t` pairs of different width correctly;
  before, integers could be serialized with the wrong value if `number_integer_t` was narrower than
  `number_unsigned_t`.
+- Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
+  array or object was silently skipped, producing invalid MessagePack.
@@ -61,6 +61,8 @@ Strong guarantee: if an exception is thrown, there are no changes in the JSON va
 - Throws [type_error.316](../../home/exceptions.md#jsonexceptiontype_error316) if a string or object key in `j` is
  not valid UTF-8 and `error_handler` is `strict` (the default only if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled)
+- Throws [type_error.321](../../home/exceptions.md#jsonexceptiontype_error321) if `j` or a value nested in it is
+  discarded; example: `"cannot serialize discarded value to UBJSON"`

 ## Complexity

@@ -112,3 +114,5 @@ Linear in the size of the JSON value `j`.
 - Added `error_handler` parameter in version 3.13.0. Its default, `keep`, writes the bytes of a string or object key
  that is not valid UTF-8 unchanged, as before; `strict` (the default if
  [`JSON_STRICT_BINARY_UTF8`](../macros/json_strict_binary_utf8.md) is enabled) throws `type_error.316`.
+- Throws `type_error.321` for a discarded value since version 3.13.0; previously, a discarded value nested in an
+  array or object was silently skipped, producing invalid UBJSON.
@@ -52,7 +52,6 @@ Constant.
 - [operator value_t](operator_value_t.md) implicit conversion operator equivalent to this named member function
 - [type_name](type_name.md) returns the type as a string, for use in error messages
 - [value_t](value_t.md) the enumeration of JSON types
- [basic_json_view::type](../basic_json_view/type.md) - the same function on a zero-copy view

 ## Version history

@@ -1,67 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>accept
-
-```cpp
-template<typename InputType>
-static bool accept(InputType&& input,
-                   const bool ignore_comments = false,
-                   const bool ignore_trailing_commas = false);
-```
-
-Checks whether the input is valid JSON, accepting and rejecting exactly what
-[`BasicJsonType::accept()`](../basic_json/accept.md) does, with the same options. Unlike [`parse()`](parse.md), this
-function never throws an exception for invalid input, and the returned `#!cpp bool` is the only result -- no document
-is returned.
-
-## Template parameters
-
-`InputType`
-:   A compatible input; see [`parse`](parse.md#template-parameters).
-
-## Parameters
-
-`input` (in)
-:   Input to check.
-
-`ignore_comments` (in)
-:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
-    (`#!cpp false`); (optional, `#!cpp false` by default)
-
-`ignore_trailing_commas` (in)
-:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
-    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
-
-## Return value
-
-Whether the input is valid JSON.
-
-## Exception safety
-
-Strong guarantee: this function itself never throws for an invalid input; it can only throw what allocating the
-input's own copy (for inputs that are always read into a buffer) throws.
-
-## Complexity
-
-Linear in the length of the input.
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__accept.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__accept.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input
- [`BasicJsonType::accept`](../basic_json/accept.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,58 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>basic_json_document
-
-```cpp
-// (1)
-basic_json_document() = default;
-
-// (2)
-basic_json_document(basic_json_document&& other) noexcept = default;
-
-// (3)
-basic_json_document(const basic_json_document&) = delete;
-```
-
-1. Creates an empty (discarded) document: [`root()`](root.md) returns a discarded view, and
-   [`is_discarded()`](is_discarded.md) is `#!cpp true`.
-2. Move constructor. Takes over `other`'s index and, if owned, its text; `other` is left as an empty document. Views
-   taken from `other` before the move remain valid, because the index is heap-allocated independently of the
-   `basic_json_document` object.
-3. `basic_json_document` is move-only. Copying is disabled because it would either duplicate a potentially large index
-   and text, or leave two documents claiming to borrow the same buffer.
-
-## Parameters
-
-`other` (in)
-:   another document to move the index and text from
-
-## Exception safety
-
-No-throw guarantee: the default and move constructors never throw exceptions.
-
-## Complexity
-
-Constant, for the default and move constructors.
-
-## Examples
-
-??? example
-
-    The example below shows the default constructor and demonstrates that `basic_json_document` is move-only.
-
-    ```cpp
-    --8<-- "examples/basic_json_document__basic_json_document.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__basic_json_document.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input
- [is_discarded](is_discarded.md) - return whether the last parse failed
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,56 +0,0 @@
-# <small>nlohmann::</small>basic_json_document
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-template<typename BasicJsonType>
-class basic_json_document;
-```
-
-A parsed JSON text, held as a flat index of its values
-([16 bytes per value](../../home/architecture.md#node-index-of-json-views)) instead of a tree of `BasicJsonType` values.
-Strings and numbers stay in the source text; only strings that contain escapes are decoded, into one buffer owned by
-the document. [`basic_json_view`](../basic_json_view/index.md) is a read-only handle to one value of a
-`basic_json_document`; [`materialize()`](../basic_json_view/materialize.md) turns a subtree back into the
-`BasicJsonType` value that [`BasicJsonType::parse()`](../basic_json/parse.md) would have produced for it.
-
-A document may **borrow** the text it was parsed from (the caller's buffer must then outlive the document) or **own**
-it (a copy, or an rvalue `#!cpp std::string` that was moved in); see [`owns_source`](owns_source.md). `basic_json_document`
-is move-only: copying a document would either duplicate a potentially large index and text, or leave two documents
-claiming to borrow the same buffer, so it is disabled.
-
-## Template parameters
-
-`BasicJsonType`
-:   a specialization of [`basic_json`](../basic_json/index.md), for instance [`json`](../json.md) or
-    [`ordered_json`](../ordered_json.md). Only 64-bit `number_integer_t`/`number_unsigned_t` types are supported; this
-    is checked with a `static_assert`.
-
-## Specializations
-
- [**json_document**](../json_document.md) - documents of the default specialization [`json`](../json.md)
- [**ordered_json_document**](../ordered_json_document.md) - documents of [`ordered_json`](../ordered_json.md)
-
-## Member types
-
- **view_type** - the type of view returned by [`root()`](root.md) (`#!cpp basic_json_view<BasicJsonType>`)
- **value_t** - the JSON type enumeration, see [`basic_json::value_t`](../basic_json/value_t.md)
-
-## Member functions
-
- [(constructor)](basic_json_document.md)
- [**parse**](parse.md) (_static_) - deserialize from a compatible input, borrowing or owning it as appropriate
- [**parse_copy**](parse_copy.md) (_static_) - deserialize a copy of a compatible input
- [**accept**](accept.md) (_static_) - check whether the input is valid JSON
- [**read**](read.md) - (re-)parse into this document, reusing its memory
- [**root**](root.md) - the view of the root value
- [**is_discarded**](is_discarded.md) - return whether the last parse failed
- [**source**](source.md) - the parsed text
- [**owns_source**](owns_source.md) - return whether the document holds its own copy of the text
- [**node_count**](node_count.md) - the number of index entries (values plus object keys)
- [**memory_usage**](memory_usage.md) - the number of bytes held by the document
- [**shrink_to_fit**](shrink_to_fit.md) - release unused index capacity
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,49 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>is_discarded
-
-```cpp
-bool is_discarded() const noexcept;
-```
-
-Returns whether the document holds no value, either because it was default-constructed or because the last call to
-[`parse()`](parse.md), [`parse_copy()`](parse_copy.md), or [`read()`](read.md) failed with `allow_exceptions` set to
-`#!cpp false`.
-
-## Return value
-
-`#!cpp true` if the document is discarded, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-When the document is discarded, [`root()`](root.md) returns a discarded view (its
-[`is_discarded()`](../basic_json_view/is_discarded.md) is also `#!cpp true`).
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__is_discarded.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__is_discarded.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input
- [is_discarded (basic_json_view)](../basic_json_view/is_discarded.md) - return whether a view is invalid
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,50 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>memory_usage
-
-```cpp
-std::size_t memory_usage() const noexcept;
-```
-
-Returns the number of bytes held by the document: the node index, the decoded-string buffer (for strings that
-contain escapes), and, for an owned document, its copy of the source text.
-
-## Return value
-
-The number of bytes the document holds, `0` for a [discarded](is_discarded.md) document.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-The exact value depends on the platform, the allocator, and the library's own layout, and may change between
-versions; do not rely on it being a specific number, and do not compare it across different builds or platforms.
-Compare it for the same document over time, or between documents built with the same binary, instead -- for instance
-to observe the effect of [`shrink_to_fit()`](shrink_to_fit.md).
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__memory_usage.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__memory_usage.output"
-    ```
-
-## See also
-
- [node_count](node_count.md) - the number of index entries
- [shrink_to_fit](shrink_to_fit.md) - release unused index capacity
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,49 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>node_count
-
-```cpp
-std::size_t node_count() const noexcept;
-```
-
-Returns the number of entries in the document's flat index.
-
-## Return value
-
-The number of index entries: one per value (of any type, at any nesting depth) plus one per object key. `0` for a
-[discarded](is_discarded.md) document.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-Each index entry is [16 bytes](../../home/architecture.md#node-index-of-json-views), so `#!cpp node_count() * 16` is
-the size of the index itself (part, but not all, of [`memory_usage()`](memory_usage.md), which also counts decoded
-strings and, for an owned document, the text).
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__node_count.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__node_count.output"
-    ```
-
-## See also
-
- [memory_usage](memory_usage.md) - the number of bytes held by the document
- [shrink_to_fit](shrink_to_fit.md) - release unused index capacity
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,49 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>owns_source
-
-```cpp
-bool owns_source() const noexcept;
-```
-
-Returns whether the document holds its own copy of the parsed text, as opposed to borrowing the caller's buffer.
-
-## Return value
-
-`#!cpp true` if the document owns the text returned by [`source()`](source.md), `#!cpp false` if it borrows it (or if
-the document is [discarded](is_discarded.md)).
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-See the ownership table on [`parse`](parse.md#notes) for which inputs are borrowed and which are owned. A borrowed
-document (`#!cpp owns_source() == false`) is only valid while the buffer it was parsed from is still alive.
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__owns_source.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__owns_source.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input
- [parse_copy](parse_copy.md) - deserialize a copy of a compatible input, always owned
- [source](source.md) - the parsed text
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,139 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>parse
-
-```cpp
-// (1)
-template<typename InputType>
-static basic_json_document parse(InputType&& input,
-                                 const bool allow_exceptions = true,
-                                 const bool ignore_comments = false,
-                                 const bool ignore_trailing_commas = false);
-
-// (2)
-template<typename IteratorType>
-static basic_json_document parse(IteratorType first, IteratorType last,
-                                 const bool allow_exceptions = true,
-                                 const bool ignore_comments = false,
-                                 const bool ignore_trailing_commas = false);
-```
-
-1. Deserialize from a compatible input, borrowing or owning it depending on its value category and type (see Notes).
-2. Deserialize from a pair of input iterators.
-
-Both overloads accept exactly what [`BasicJsonType::parse()`](../basic_json/parse.md) accepts, with the same
-`ignore_comments`/`ignore_trailing_commas` options, but build a [`basic_json_document`](index.md) (a flat index into
-the input) instead of a tree of `BasicJsonType` values.
-
-## Template parameters
-
-`InputType`
-:   A compatible input, for instance:
-
-    - a `#!cpp std::string`, `#!cpp std::string_view`, or a C-style array of characters
-    - a pointer to a null-terminated string of single byte characters
-    - a container for which `#!cpp obj.data()` and `#!cpp obj.size()` give contiguous single-byte access, e.g.
-      `#!cpp std::vector<char>` or `#!cpp std::vector<std::uint8_t>`
-    - an `#!cpp std::istream` object, or anything else [`BasicJsonType::parse()`](../basic_json/parse.md) accepts
-
-`IteratorType`
-:   a compatible iterator type, for instance a pair of pointers such as `ptr` and `ptr + len`, or a pair of
-    `#!cpp std::string::iterator`
-
-## Parameters
-
-`input` (in)
-:   Input to parse from.
-
-`allow_exceptions` (in)
-:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
-
-`ignore_comments` (in)
-:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
-    (`#!cpp false`); (optional, `#!cpp false` by default)
-
-`ignore_trailing_commas` (in)
-:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
-    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
-
-`first` (in)
-:   iterator to the start of a character range
-
-`last` (in)
-:   iterator to the end of a character range
-
-## Return value
-
-The parsed document. If `allow_exceptions` is `#!cpp false` and the input is not valid JSON, the returned document is
-discarded; see [`is_discarded`](is_discarded.md).
-
-## Exceptions
-
-Throws the same exception [`BasicJsonType::parse()`](../basic_json/parse.md) throws for the same input and options --
-the same exception id, message, and position -- because on a failing input the library's own parser is run on the
-same bytes to produce the diagnostic. Additionally throws
-[`out_of_range.416`](../../home/exceptions.md#jsonexceptionout_of_range416) if the input is 4 GiB or larger, a size
-[`BasicJsonType::parse()`](../basic_json/parse.md) does not reject.
-
-## Complexity
-
-Linear in the length of the input.
-
-## Notes
-
-**Ownership.** Whether the document borrows `input` or owns a copy of it depends on its value category and type:
-
-| `input`                                                                             | ownership                                                    |
-|--------------------------------------------------------------------------------------|--------------------------------------------------------------|
-| lvalue byte container (`std::string`, `std::vector<char>`, ...), `std::string_view`, C string, character array | **borrowed** -- `input` must outlive the document |
-| rvalue `#!cpp std::string`                                                            | **owned**, moved in without a copy                            |
-| rvalue byte container other than `#!cpp std::string`                                  | **owned**, copied                                             |
-| stream, wide string, or anything else read through the general input adapter          | **owned**, read into a buffer (a stream is read to its end)   |
-
-For overload (2), a pair of pointers to single-byte integers (e.g. `#!cpp const char*`, `#!cpp std::uint8_t*`) is
-borrowed. From C++20 on, so is any other contiguous iterator over single bytes, such as
-`#!cpp std::vector<char>::iterator` or `#!cpp std::string::const_iterator`. Before C++20 these iterators cannot be
-told apart from other class-type iterators, so their range is read into an owned buffer, as is any non-contiguous
-range (e.g. of a `#!cpp std::list<char>`).
-
-See [`owns_source`](owns_source.md) to check which happened after a call, and the
-[feature page](../../features/json_view.md) for the reasoning.
-
-**Numbers.** As for [`BasicJsonType::parse()`](../basic_json/parse.md), an integer literal too large for the 64-bit
-integer type becomes a floating-point value.
-
-## Examples
-
-??? example "Example: (1) borrowed vs. owned input, and errors identical to `BasicJsonType::parse()`"
-
-    ```cpp
-    --8<-- "examples/basic_json_document__parse.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__parse.output"
-    ```
-
-??? example "Example: (2) parse an iterator range (no NUL terminator required)"
-
-    ```cpp
-    --8<-- "examples/basic_json_document__parse_iterator_pair.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__parse_iterator_pair.output"
-    ```
-
-## See also
-
- [parse_copy](parse_copy.md) - deserialize a copy of a compatible input
- [accept](accept.md) - check whether the input is valid JSON
- [read](read.md) - (re-)parse into this document, reusing its memory
- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
- [`BasicJsonType::parse`](../basic_json/parse.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,77 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>parse_copy
-
-```cpp
-template<typename InputType>
-static basic_json_document parse_copy(InputType&& input,
-                                      const bool allow_exceptions = true,
-                                      const bool ignore_comments = false,
-                                      const bool ignore_trailing_commas = false);
-```
-
-Deserialize from a compatible input, always taking the document's own copy of it, regardless of the value category or
-type of `input`. Unlike [`parse()`](parse.md), the returned document never depends on `input` staying alive.
-
-## Template parameters
-
-`InputType`
-:   A compatible input; see [`parse`](parse.md#template-parameters).
-
-## Parameters
-
-`input` (in)
-:   Input to parse from.
-
-`allow_exceptions` (in)
-:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
-
-`ignore_comments` (in)
-:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
-    (`#!cpp false`); (optional, `#!cpp false` by default)
-
-`ignore_trailing_commas` (in)
-:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
-    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
-
-## Return value
-
-The parsed document, with [`owns_source()`](owns_source.md) `#!cpp true`. If `allow_exceptions` is `#!cpp false` and
-the input is not valid JSON, the returned document is discarded; see [`is_discarded`](is_discarded.md).
-
-## Exceptions
-
-Same as [`parse`](parse.md#exceptions).
-
-## Complexity
-
-Linear in the length of the input.
-
-## Notes
-
-`parse_copy()` accepts and rejects exactly what [`parse()`](parse.md) does, and classifies numbers the same way; it
-only differs in that the input is always copied rather than sometimes borrowed. Prefer [`parse()`](parse.md) when the
-input's lifetime already covers the document's, since it avoids the copy for borrowed inputs.
-
-## Examples
-
-??? example
-
-    The example below returns a document from a function whose local buffer would otherwise not outlive it.
-
-    ```cpp
-    --8<-- "examples/basic_json_document__parse_copy.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__parse_copy.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input, borrowing it where possible
- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,76 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>read
-
-```cpp
-template<typename InputType>
-void read(InputType&& input,
-         const bool allow_exceptions = true,
-         const bool ignore_comments = false,
-         const bool ignore_trailing_commas = false);
-```
-
-(Re-)parses `input` into `#!cpp *this`, discarding the document's previous value and reusing its memory (the node
-index, the decoded-string buffer, and, if applicable, the owned copy of the text) rather than allocating a fresh
-document. [`parse()`](parse.md) is implemented in terms of this function, applied to a default-constructed document.
-
-## Template parameters
-
-`InputType`
-:   A compatible input; see [`parse`](parse.md#template-parameters).
-
-## Parameters
-
-`input` (in)
-:   Input to parse from.
-
-`allow_exceptions` (in)
-:   whether to throw exceptions in case of a parse error (optional, `#!cpp true` by default)
-
-`ignore_comments` (in)
-:   whether comments should be ignored and treated like whitespace (`#!cpp true`) or yield a parse error
-    (`#!cpp false`); (optional, `#!cpp false` by default)
-
-`ignore_trailing_commas` (in)
-:   whether trailing commas in arrays or objects should be ignored and treated like whitespace (`#!cpp true`) or
-    yield a parse error (`#!cpp false`); (optional, `#!cpp false` by default)
-
-## Exceptions
-
-Same as [`parse`](parse.md#exceptions).
-
-## Complexity
-
-Linear in the length of the input.
-
-## Notes
-
-Every view taken from `#!cpp *this` before the call -- including the previous [`root()`](root.md) -- is invalidated,
-whether or not the new parse succeeds; take fresh views from [`root()`](root.md) afterward.
-
-`input` is borrowed or owned by the same rules as [`parse()`](parse.md#notes); a document can borrow on one call and
-own on the next, since ownership is decided freshly each time.
-
-## Examples
-
-??? example
-
-    The example below parses a sequence of messages into the same document, reusing its memory instead of allocating
-    a new document for each one.
-
-    ```cpp
-    --8<-- "examples/basic_json_document__read.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__read.output"
-    ```
-
-## See also
-
- [parse](parse.md) - deserialize from a compatible input
- [root](root.md) - the view of the root value
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,50 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>root
-
-```cpp
-view_type root() const noexcept;
-```
-
-Returns a view of the root value of the document.
-
-## Return value
-
-A [`view_type`](index.md#member-types) (i.e. `#!cpp basic_json_view<BasicJsonType>`) for the root value, or a
-discarded view if the document is [discarded](is_discarded.md).
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-`root()` is a cheap handle into the document's index, not a copy of anything; call it as often as needed. The
-returned view is valid under the same conditions as any other view of the document -- see
-[Object inspection](../basic_json_view/index.md) -- in particular, it is invalidated by the next
-[`read()`](read.md) or [`shrink_to_fit()`](shrink_to_fit.md) on this document.
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__root.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__root.output"
-    ```
-
-## See also
-
- [is_discarded](is_discarded.md) - return whether the last parse failed
- [materialize](../basic_json_view/materialize.md) - build the `BasicJsonType` value of a subtree
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,58 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>shrink_to_fit
-
-```cpp
-void shrink_to_fit();
-```
-
-Releases capacity that is no longer needed, both of the node index and of the buffer for decoded strings (strings that
-contained escape sequences), e.g. after [`read()`](read.md) replaced a large document with a much smaller one. Like
-`#!cpp std::vector::shrink_to_fit()`, this is a non-binding request: the library may keep more capacity than strictly
-necessary.
-
-## Exception safety
-
-Strong guarantee: if an exception is thrown, there are no changes to the document.
-
-## Exceptions
-
-May throw `#!cpp std::bad_alloc` if the reallocation fails; on exception, the document is unchanged.
-
-## Complexity
-
-Linear in [`node_count()`](node_count.md) plus the length of the decoded strings.
-
-## Notes
-
-!!! warning "Invalidates views"
-
-    Unlike moving the document, `shrink_to_fit()` **invalidates every view taken from this document before the
-    call**, including a previously obtained [`root()`](root.md): the node index is moved into a new, smaller
-    allocation, and the old one is freed. Take a fresh view from [`root()`](root.md) after calling this function.
-
-This is unlike `#!cpp std::vector::shrink_to_fit()`, which promises nothing about validity but in practice often
-leaves iterators alone when it did not need to reallocate; here, an implementation that avoids a reallocation when
-possible would be an internal optimization only, not a guarantee to rely on.
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__shrink_to_fit.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__shrink_to_fit.output"
-    ```
-
-## See also
-
- [node_count](node_count.md) - the number of index entries
- [memory_usage](memory_usage.md) - the number of bytes held by the document
- [root](root.md) - the view of the root value
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,48 +0,0 @@
-# <small>nlohmann::basic_json_document::</small>source
-
-```cpp
-view_type::string_view_t source() const noexcept;
-```
-
-Returns the parsed text, whether it is borrowed from the caller or owned by the document.
-
-## Return value
-
-A `#!cpp string_view_t` (`#!cpp std::string_view` on C++17 and newer) over the parsed text, or an empty one if the
-document is [discarded](is_discarded.md).
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-For a borrowed document, `source()` points directly into the caller's buffer, so it is only valid while that buffer
-is; see [`owns_source`](owns_source.md).
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_document__source.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_document__source.output"
-    ```
-
-## See also
-
- [owns_source](owns_source.md) - return whether the document holds its own copy of the text
- [source_offset](../basic_json_view/source_offset.md) - byte offset of a value in the source text
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,51 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>basic_json_view
-
-```cpp
-basic_json_view() noexcept = default;
-```
-
-Creates an invalid (discarded) view: [`type()`](type.md) is `#!cpp value_t::discarded`,
-[`is_discarded()`](is_discarded.md) is `#!cpp true`, and `#!cpp explicit operator bool()` is `#!cpp false`.
-
-This is the only constructor a caller can use directly. Every other view is obtained from a
-[`basic_json_document`](../basic_json_document/index.md), via [`root()`](../basic_json_document/root.md) or (once
-element access is added) from navigating into a container.
-
-## Exception safety
-
-No-throw guarantee: this constructor never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-`basic_json_view` is trivially copyable (it holds two pointers), so a default-constructed view can be used as a
-placeholder for "no value yet" and later be assigned a real view.
-
-## Examples
-
-??? example
-
-    The example below shows the default constructor and that a `basic_json_view` is a small, copyable handle.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__basic_json_view.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__basic_json_view.output"
-    ```
-
-## See also
-
- [is_discarded](is_discarded.md) - return whether the view is invalid
- [operator bool](operator_bool.md) - return whether the view refers to a value
- [root](../basic_json_document/root.md) - the view of a document's root value
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,61 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>empty
-
-```cpp
-bool empty() const noexcept;
-```
-
-Checks whether [`size()`](size.md) is `0`, as [`BasicJsonType::empty()`](../basic_json/empty.md) would for the same
-value.
-
-## Return value
-
-The return value depends on the type and is defined as follows:
-
-| Value type          | return value    |
-|----------------------|-----------------|
-| null                  | `#!cpp true`     |
-| discarded             | `#!cpp true`     |
-| boolean               | `#!cpp false`    |
-| string                | `#!cpp false`    |
-| number                | `#!cpp false`    |
-| object                | `#!cpp object_t::empty()` |
-| array                 | `#!cpp array_t::empty()`  |
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-As for [`BasicJsonType::empty()`](../basic_json/empty.md), this does not return whether a string value is empty -- it
-is `#!cpp false` for any string, regardless of its length.
-
-## Examples
-
-??? example
-
-    The example below uses [`size()`](size.md) and `empty()` to decide whether a parsed message is worth acting on,
-    without materializing it into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__size_empty.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__size_empty.output"
-    ```
-
-## See also
-
- [size](size.md) - return the number of elements
- [`BasicJsonType::empty`](../basic_json/empty.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,82 +0,0 @@
-# <small>nlohmann::</small>basic_json_view
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-template<typename BasicJsonType>
-class basic_json_view;
-```
-
-A read-only handle to one value of a [`basic_json_document`](../basic_json_document/index.md): two pointers (a pointer
-to the document and a pointer into its index), trivially copyable. A view is valid as long as
-
- the document is alive,
- the document has not been re-parsed with [`read()`](../basic_json_document/read.md) (or
-  [`parse()`](../basic_json_document/parse.md) into it) or shrunk with
-  [`shrink_to_fit()`](../basic_json_document/shrink_to_fit.md) since the view was taken, and
- if the document borrows its source text, that text is still alive.
-
-Moving the document itself does not invalidate its views: the index is heap-allocated independently of the
-`basic_json_document` object.
-
-`basic_json_view` provides the read-only part of the `BasicJsonType` interface: the type-inspection functions, and
-[`materialize()`](materialize.md) to build the `BasicJsonType` value of a subtree on demand. It does not (yet) provide
-element access, iteration, `get<T>()`, JSON Pointer support, `dump()`, or comparison.
-
-## Template parameters
-
-`BasicJsonType`
-:   a specialization of [`basic_json`](../basic_json/index.md), matching the
-    [`basic_json_document`](../basic_json_document/index.md) the view was taken from.
-
-## Specializations
-
- [**json_view**](../json_view.md) - views of a [`json_document`](../json_document.md)
- [**ordered_json_view**](../ordered_json_view.md) - views of an [`ordered_json_document`](../ordered_json_document.md)
-
-## Member types
-
- **value_t** - the JSON type enumeration, see [`basic_json::value_t`](../basic_json/value_t.md)
- **string_t**, **number_integer_t**, **number_unsigned_t**, **number_float_t**, **json_pointer** - the corresponding
-  member types of `BasicJsonType`
- **size_type** - `#!cpp std::size_t`
- **string_view_t** - `#!cpp std::string_view` on C++17 and newer, a minimal internal substitute otherwise
-
-## Member functions
-
- [(constructor)](basic_json_view.md)
-
-### Object inspection
-
- [**type**](type.md) - return the type of the value
- [**is_null**](is_null.md) - return whether the value is null
- [**is_boolean**](is_boolean.md) - return whether the value is a boolean
- [**is_number**](is_number.md) - return whether the value is a number
- [**is_number_integer**](is_number_integer.md) - return whether the value is an integer number
- [**is_number_unsigned**](is_number_unsigned.md) - return whether the value is an unsigned integer number
- [**is_number_float**](is_number_float.md) - return whether the value is a floating-point number
- [**is_string**](is_string.md) - return whether the value is a string
- [**is_array**](is_array.md) - return whether the value is an array
- [**is_object**](is_object.md) - return whether the value is an object
- [**is_binary**](is_binary.md) - return whether the value is a binary array (always `#!cpp false`)
- [**is_primitive**](is_primitive.md) - return whether the type is primitive
- [**is_structured**](is_structured.md) - return whether the type is structured
- [**is_discarded**](is_discarded.md) - return whether the view is invalid
- [**operator bool**](operator_bool.md) - return whether the view refers to a value
-
-### Capacity
-
- [**size**](size.md) - return the number of elements
- [**empty**](empty.md) - return whether the value has no elements
-
-### Conversion
-
- [**materialize**](materialize.md) - build the `BasicJsonType` value of this subtree
-
-### Source access
-
- [**source_offset**](source_offset.md) - byte offset of this value in the document's source text
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_array
-
-```cpp
-bool is_array() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is an array.
-
-## Return value
-
-`#!cpp true` if the type is an array, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_structured](is_structured.md) - return whether the type is structured
- [size](size.md), [empty](empty.md) - the number of elements, and whether there are none
- [`BasicJsonType::is_array`](../basic_json/is_array.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_binary
-
-```cpp
-bool is_binary() const noexcept;
-```
-
-This function always returns `#!cpp false`: a JSON text has no binary values, so a view can never refer to one. The
-function exists for interface parity with [`BasicJsonType::is_binary`](../basic_json/is_binary.md).
-
-## Return value
-
-`#!cpp false`, always.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [type](type.md) - return the type of the value
- [`BasicJsonType::is_binary`](../basic_json/is_binary.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,45 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_boolean
-
-```cpp
-bool is_boolean() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is a boolean.
-
-## Return value
-
-`#!cpp true` if the type is a boolean, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [type](type.md) - return the type of the value
- [`BasicJsonType::is_boolean`](../basic_json/is_boolean.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,55 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_discarded
-
-```cpp
-bool is_discarded() const noexcept;
-```
-
-Returns whether this view is invalid, i.e. does not refer to a value. This is the case for a default-constructed
-view (see [(constructor)](basic_json_view.md)), and for [`root()`](../basic_json_document/root.md) of a document
-that is itself [discarded](../basic_json_document/is_discarded.md) -- in particular, the root of a failed
-[`parse()`](../basic_json_document/parse.md) with `allow_exceptions` set to `#!cpp false`.
-
-## Return value
-
-`#!cpp true` if the view is discarded, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-`#!cpp v.is_discarded()` and `#!cpp !static_cast<bool>(v)` are equivalent; use whichever reads better at the call
-site.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [operator bool](operator_bool.md) - return whether the view refers to a value
- [(constructor)](basic_json_view.md) - the default constructor creates a discarded view
- [is_discarded (basic_json_document)](../basic_json_document/is_discarded.md) - return whether the last parse failed
- [`BasicJsonType::is_discarded`](../basic_json/is_discarded.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,45 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_null
-
-```cpp
-bool is_null() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is `#!json null`.
-
-## Return value
-
-`#!cpp true` if the type is `#!json null`, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [type](type.md) - return the type of the value
- [`BasicJsonType::is_null`](../basic_json/is_null.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,47 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_number
-
-```cpp
-bool is_number() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is a number, i.e. an integer, unsigned integer, or floating-point value. It is defined as `#!cpp is_number_integer() || is_number_float()`.
-
-## Return value
-
-`#!cpp true` if the type is a number, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_number_integer](is_number_integer.md) - return whether the value is an integer or unsigned integer number
- [is_number_unsigned](is_number_unsigned.md) - return whether the value is an unsigned integer number
- [is_number_float](is_number_float.md) - return whether the value is a floating-point number
- [`BasicJsonType::is_number`](../basic_json/is_number.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,51 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_number_float
-
-```cpp
-bool is_number_float() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is a floating-point number.
-
-## Return value
-
-`#!cpp true` if the type is `#!cpp value_t::number_float`, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-As for [`BasicJsonType::parse`](../basic_json/parse.md), an integer literal that does not fit into the 64-bit
-integer type is classified as a floating-point number, so `is_number_float()` can be `#!cpp true` even for an
-integer-looking token in the source text.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_number](is_number.md) - return whether the value is a number
- [`BasicJsonType::is_number_float`](../basic_json/is_number_float.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,51 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_number_integer
-
-```cpp
-bool is_number_integer() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is an integer or unsigned integer number.
-
-## Return value
-
-`#!cpp true` if the type is `#!cpp value_t::number_integer` or `#!cpp value_t::number_unsigned`, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-As for [`BasicJsonType::is_number_integer`](../basic_json/is_number_integer.md), this includes unsigned integer
-values; use [`is_number_unsigned`](is_number_unsigned.md) to test for those specifically.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_number](is_number.md) - return whether the value is a number
- [is_number_unsigned](is_number_unsigned.md) - return whether the value is an unsigned integer number
- [`BasicJsonType::is_number_integer`](../basic_json/is_number_integer.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,45 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_number_unsigned
-
-```cpp
-bool is_number_unsigned() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is an unsigned integer number.
-
-## Return value
-
-`#!cpp true` if the type is `#!cpp value_t::number_unsigned`, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_number_integer](is_number_integer.md) - return whether the value is an integer or unsigned integer number
- [`BasicJsonType::is_number_unsigned`](../basic_json/is_number_unsigned.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_object
-
-```cpp
-bool is_object() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is an object.
-
-## Return value
-
-`#!cpp true` if the type is an object, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_structured](is_structured.md) - return whether the type is structured
- [size](size.md), [empty](empty.md) - the number of elements, and whether there are none
- [`BasicJsonType::is_object`](../basic_json/is_object.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_primitive
-
-```cpp
-bool is_primitive() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is primitive, i.e. `#!json null`, a boolean, a number, or a string. It is defined as `#!cpp is_null() || is_string() || is_boolean() || is_number()`.
-
-## Return value
-
-`#!cpp true` if the type is primitive, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_structured](is_structured.md) - return whether the type is structured (the complement of this function, for a
-  non-discarded view)
- [`BasicJsonType::is_primitive`](../basic_json/is_primitive.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,45 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_string
-
-```cpp
-bool is_string() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is a string.
-
-## Return value
-
-`#!cpp true` if the type is a string, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [source_offset](source_offset.md) - byte offset of this value in the document's source text
- [`BasicJsonType::is_string`](../basic_json/is_string.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>is_structured
-
-```cpp
-bool is_structured() const noexcept;
-```
-
-This function returns `#!cpp true` if and only if the value is structured, i.e. an array or an object. It is defined as `#!cpp is_array() || is_object()`.
-
-## Return value
-
-`#!cpp true` if the type is structured, `#!cpp false` otherwise.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_primitive](is_primitive.md) - return whether the type is primitive
- [size](size.md), [empty](empty.md) - the number of elements, and whether there are none
- [`BasicJsonType::is_structured`](../basic_json/is_structured.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,69 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>materialize
-
-```cpp
-BasicJsonType materialize() const;
-```
-
-Builds the `BasicJsonType` value of this subtree: the value [`BasicJsonType::parse()`](../basic_json/parse.md) would
-have produced for the same source text, allocated for the first time by this call.
-
-## Return value
-
-The `BasicJsonType` value of this subtree, or a discarded `BasicJsonType` value (`#!cpp BasicJsonType(value_t::discarded)`)
-if the view is [discarded](is_discarded.md).
-
-## Exception safety
-
-Strong guarantee: if an exception is thrown, there are no changes to the view or the document it refers to (nothing
-about either is mutated by this function).
-
-## Exceptions
-
-May throw `#!cpp std::bad_alloc` (via `BasicJsonType`'s allocator) if constructing the result fails.
-
-## Complexity
-
-Linear in the size of the subtree.
-
-## Notes
-
-`materialize()` replays the subtree through the same SAX builder [`BasicJsonType::parse()`](../basic_json/parse.md)
-uses internally, so the result matches it exactly -- including, for an object, that a repeated key keeps only its
-last value. The replay is iterative, so it is not limited by the call stack the way a naive recursive conversion
-would be; the JSON nesting depth is limited only by available memory, as for `BasicJsonType::parse()` itself.
-
-Unlike parsing with [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) enabled, the values
-produced by `materialize()` do not carry source positions: there is no lexer run during the replay to record them.
-
-Calling `materialize()` on the same view repeatedly builds a new, independent `BasicJsonType` value each time; it
-never caches the result.
-
-## Examples
-
-??? example
-
-    The example below skips messages that are not useful -- a discarded value, or an empty array -- using only
-    [`is_array()`](is_array.md) and [`empty()`](empty.md), and calls `materialize()` only for the messages that are
-    actually used, so no `BasicJsonType` value (and none of its per-element allocations) is ever built for the
-    skipped ones.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__materialize.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__materialize.output"
-    ```
-
-## See also
-
- [root](../basic_json_document/root.md) - the view of a document's root value
- [`BasicJsonType::parse`](../basic_json/parse.md) - build a `BasicJsonType` value directly from a JSON text
- [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) - source positions on parsed values (not
-  produced by `materialize()`)
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,46 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>operator bool
-
-```cpp
-explicit operator bool() const noexcept;
-```
-
-Returns whether this view refers to a value, i.e. the negation of [`is_discarded()`](is_discarded.md). Being
-`#!cpp explicit`, this conversion is only considered in a boolean context (`#!cpp if (v)`, `#!cpp !v`, `#!cpp v &&
-...`), not for implicit conversions to other types.
-
-## Return value
-
-`#!cpp true` if the view refers to a value, `#!cpp false` if it is [discarded](is_discarded.md).
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_discarded](is_discarded.md) - return whether the view is invalid
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,60 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>size
-
-```cpp
-size_type size() const noexcept;
-```
-
-Returns the number of elements, as [`BasicJsonType::size()`](../basic_json/size.md) would for the same value.
-
-## Return value
-
-The return value depends on the type and is defined as follows:
-
-| Value type          | return value                |
-|----------------------|-----------------------------|
-| null                  | `0`                          |
-| discarded             | `0`                          |
-| boolean               | `1`                          |
-| string                | `1`                          |
-| number                | `1`                          |
-| object                | number of key/value pairs    |
-| array                 | number of elements           |
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant: for an object or array, the element count is stored in the index, not counted on demand.
-
-## Notes
-
-As for [`BasicJsonType::size()`](../basic_json/size.md), this does not return the length of a string value -- it is
-`1` for a string, regardless of its length.
-
-## Examples
-
-??? example
-
-    The example below uses `size()` and [`empty()`](empty.md) to decide whether a parsed message is worth acting on,
-    without materializing it into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__size_empty.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__size_empty.output"
-    ```
-
-## See also
-
- [empty](empty.md) - return whether the value has no elements
- [`BasicJsonType::size`](../basic_json/size.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,55 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>source_offset
-
-```cpp
-std::size_t source_offset() const noexcept;
-```
-
-Returns the byte offset of this value in the document's [`source()`](../basic_json_document/source.md) text, without
-materializing anything.
-
-## Return value
-
- For a string with no escapes, a number, `#!json true`/`#!json false`/`#!json null`, an array, or an object: the
-  byte offset of the first byte of the value's token (for a string: the first byte after the opening quote) in
-  [`source()`](../basic_json_document/source.md).
- `#!cpp static_cast<std::size_t>(-1)` for a [discarded](is_discarded.md) view, and for a string that contains
-  escapes -- such a string was decoded once into the document's own buffer, so there is no single byte range in
-  `source()` left to point at.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-This is a raw offset, not a length: the API does not (yet) expose how many bytes the token occupies in the source
-text, so `source_offset()` alone is enough to report *where* a value came from (for an error message, for syntax
-highlighting, ...) but not to slice its exact text back out of [`source()`](../basic_json_document/source.md) for a
-string, whose token length is not the same as its decoded [`size()`](size.md).
-
-## Examples
-
-??? example
-
-    ```cpp
-    --8<-- "examples/basic_json_view__source_offset.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__source_offset.output"
-    ```
-
-## See also
-
- [source](../basic_json_document/source.md) - the parsed text
- [is_string](is_string.md) - return whether the value is a string
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,53 +0,0 @@
-# <small>nlohmann::basic_json_view::</small>type
-
-```cpp
-value_t type() const noexcept;
-```
-
-Returns the type of the value this view refers to, as a value from the [`value_t`](../basic_json/value_t.md)
-enumeration -- the same enumeration [`BasicJsonType::type()`](../basic_json/type.md) uses.
-
-## Return value
-
-The type of the value; `#!cpp value_t::discarded` for a [discarded](is_discarded.md) view.
-
-## Exception safety
-
-No-throw guarantee: this function never throws exceptions.
-
-## Complexity
-
-Constant.
-
-## Notes
-
-Unlike [`BasicJsonType::type()`](../basic_json/type.md), this function can never return `#!cpp value_t::binary`: a
-JSON text has no binary values, so `type()` only distinguishes the eight ordinary JSON value types (plus
-`#!cpp discarded`).
-
-## Examples
-
-??? example
-
-    The example below classifies several parsed documents by the type of their root value, without materializing any
-    of them into a `BasicJsonType` value.
-
-    ```cpp
-    --8<-- "examples/basic_json_view__type_predicates.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/basic_json_view__type_predicates.output"
-    ```
-
-## See also
-
- [is_null](is_null.md), [is_boolean](is_boolean.md), [is_number](is_number.md), [is_string](is_string.md),
-  [is_array](is_array.md), [is_object](is_object.md) - type-specific predicates built on `type()`
- [`BasicJsonType::type`](../basic_json/type.md) - the corresponding function of `basic_json`
-
-## Version history
-
- Added in version 3.13.0.
@@ -1,35 +0,0 @@
-# <small>nlohmann::</small>json_document
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-using json_document = basic_json_document<json>;
-```
-
-This type is a [`basic_json_document`](basic_json_document/index.md) of the default [`json`](json.md)
-specialization.
-
-## Examples
-
-??? example
-
-    The example below demonstrates how to use the type `nlohmann::json_document`.
-
-    ```cpp
-    --8<-- "examples/json_document.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/json_document.output"
-    ```
-
-## See also
-
- [json_view](json_view.md) - a view of a value of a `json_document`
- [ordered_json_document](ordered_json_document.md) - the corresponding document for `ordered_json`
-
-## Version history
-
-Since version 3.13.0.
@@ -1,34 +0,0 @@
-# <small>nlohmann::</small>json_view
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-using json_view = basic_json_view<json>;
-```
-
-This type is a [`basic_json_view`](basic_json_view/index.md) of a value of a [`json_document`](json_document.md).
-
-## Examples
-
-??? example
-
-    The example below demonstrates how to use the type `nlohmann::json_view`.
-
-    ```cpp
-    --8<-- "examples/json_view.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/json_view.output"
-    ```
-
-## See also
-
- [json_document](json_document.md) - the document type this view refers into
- [ordered_json_view](ordered_json_view.md) - the corresponding view for `ordered_json_document`
-
-## Version history
-
-Since version 3.13.0.
@@ -58,6 +58,13 @@ header. See also the [macro overview page](../../features/macros.md).
 - [**JSON_DISABLE_ENUM_SERIALIZATION**](json_disable_enum_serialization.md) - switch off default serialization/deserialization functions for enums
 - [**JSON_DISABLE_TUPLE_REFERENCE_CONVERSION**](json_disable_tuple_reference_conversion.md) - switch off conversion from a one-element tuple of a JSON reference
 - [**JSON_USE_IMPLICIT_CONVERSIONS**](json_use_implicit_conversions.md) - control implicit conversions
+- [**JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS**](json_use_objects_for_enum_keyed_maps.md) - opt in to storing maps with enum
+  keys as objects
+
+## Deprecated functions
+
+- [**JSON_DELETE_DEPRECATED_FUNCTIONS**](json_delete_deprecated_functions.md) - opt in to deleting the deprecated
+  functions ahead of their removal in version 4.0.0

 ## Comparison behavior

@@ -0,0 +1,96 @@
+# JSON_DELETE_DEPRECATED_FUNCTIONS
+
+```cpp
+#define JSON_DELETE_DEPRECATED_FUNCTIONS /* value */
+```
+
+When defined to `1`, all [deprecated functions](../../community/roadmap.md#removal-of-deprecated-functions) of the
+library are declared as deleted (`= delete`) instead of only being marked as deprecated. Code that still calls one of
+them no longer compiles. This way, you can find all calls that need to be replaced before version 4.0.0 removes these
+functions; the [migration guide](../../integration/migration_guide.md#replace-deprecated-functions) describes how.
+
+A deleted function, unlike a removed one, still takes part in overload resolution. A call that would select it
+therefore fails to compile instead of silently selecting another overload. This matters for the deprecated
+`from_*(ptr, len)` overloads of [`from_cbor`](../basic_json/from_cbor.md), [`from_msgpack`](../basic_json/from_msgpack.md),
+[`from_ubjson`](../basic_json/from_ubjson.md), [`from_bjdata`](../basic_json/from_bjdata.md),
+[`from_bon8`](../basic_json/from_bon8.md), and [`from_bson`](../basic_json/from_bson.md): without them, a call like
+`from_cbor(ptr, len)` would compile, read `ptr` as a NUL-terminated string, and convert `len` to the `strict` parameter.
+
+The macro does not affect the deprecated legacy comparison of discarded values, which is controlled by
+[`JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON`](json_use_legacy_discarded_value_comparison.md).
+
+## Default definition
+
+The default value is `0` (disabled, the deprecated functions can still be called, and the compiler warns about it).
+
+```cpp
+#define JSON_DELETE_DEPRECATED_FUNCTIONS 0
+```
+
+## Notes
+
+!!! info "CMake option"
+
+    The macro can also be set with the CMake option
+    [`JSON_DeleteDeprecatedFunctions`](../../integration/cmake.md#json_deletedeprecatedfunctions) (`OFF` by default).
+
+!!! warning "Opt-in only"
+
+    This macro must be defined **before** including `<nlohmann/json.hpp>`. Defining it after the include has no
+    effect. Define it for the whole project to avoid different declarations of the same class in different
+    translation units.
+
+!!! note "ABI compatibility"
+
+    The macro only turns calls that compile into calls that do not; it does not change the layout or the behavior of
+    any type. Its value is therefore not encoded in the [namespace](../../features/namespace.md).
+
+## Examples
+
+??? example "Example: default behavior (macro not defined)"
+
+    Without the macro, the deprecated overload is called, and the compiler warns about it:
+
+    ```cpp
+    #include <nlohmann/json.hpp>
+
+    using json = nlohmann::json;
+
+    int main()
+    {
+        const std::vector<std::uint8_t> v = {0x82, 0x01, 0x02};
+        auto j = json::from_cbor(v.data(), v.size());
+        // warning: 'from_cbor' is deprecated: Since 3.8.0; use from_cbor(ptr, ptr + len)
+    }
+    ```
+
+??? example "Example: deleted deprecated functions (macro defined to 1)"
+
+    With the macro, the call does not compile:
+
+    ```cpp
+    #define JSON_DELETE_DEPRECATED_FUNCTIONS 1
+    #include <nlohmann/json.hpp>
+
+    using json = nlohmann::json;
+
+    int main()
+    {
+        const std::vector<std::uint8_t> v = {0x82, 0x01, 0x02};
+        auto j = json::from_cbor(v.data(), v.size());
+        // error: call to deleted function 'from_cbor'
+    }
+    ```
+
+## See also
+
+- [Roadmap: removal of deprecated functions](../../community/roadmap.md#removal-of-deprecated-functions) - the
+  deprecated functions and the version they were deprecated in
+- [Migration guide: replace deprecated functions](../../integration/migration_guide.md#replace-deprecated-functions) -
+  how to replace each deprecated function
+
+## Version history
+
+- Added in version 3.13.0.
+- Planned to be removed in version 4.0.0, which removes the deprecated functions. The deprecated `from_*(ptr, len)`
+  overloads stay deleted in version 4.0.0.
@@ -112,3 +112,4 @@ The default value is `0` (disabled — existing behavior is preserved).
 ## Version history

 - Added in version 3.13.0.
+- Planned to become the default (with the macro removed) in version 4.0.0.
@@ -44,7 +44,7 @@ By default, implicit conversions are enabled.

 ## Examples

-??? example "Example: implicit conversion"
+??? example "Example: implicit and explicit conversions"

    This is an example for an implicit conversion:

@@ -0,0 +1,139 @@
+# JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS
+
+```cpp
+#define JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS /* value */
+```
+
+When defined to `1`, maps whose keys are enums (such as `std::map<E, T>` or `std::unordered_map<E, T>`) are stored as
+JSON objects, using the enum's own conversion for the keys. By default, they are stored as arrays of `[key, value]`
+pairs.
+
+## Default definition
+
+The default value is `0` (disabled — existing behavior is preserved).
+
+```cpp
+#define JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS 0
+```
+
+## Notes
+
+!!! note "Background"
+
+    JSON object keys are strings, so a map is only stored as an object if its keys can be converted to a string type.
+    Enums are not, even if [`NLOHMANN_JSON_SERIALIZE_ENUM`](nlohmann_json_serialize_enum.md) maps them to strings, so a
+    map with enum keys becomes an array of `[key, value]` pairs:
+
+    ```json
+    [["stopped", "aa"], ["completed", "bb"]]
+    ```
+
+    With this macro, the same map becomes an object
+    (see [#4378](https://github.com/nlohmann/json/issues/4378)):
+
+    ```json
+    {"completed": "bb", "stopped": "aa"}
+    ```
+
+!!! note "Maps with non-unique keys"
+
+    Maps that allow duplicate keys, such as `std::multimap<E, T>` or `std::unordered_multimap<E, T>`, are not affected
+    by the macro and are still stored as arrays of `[key, value]` pairs, as an object cannot hold duplicate keys.
+
+!!! note "Reading"
+
+    Reading is not affected by the macro: a map with enum keys can always be read from both an array of pairs and an
+    object. For the latter, each key is converted to the enum with its `from_json` function, e.g., the one defined by
+    [`NLOHMANN_JSON_SERIALIZE_ENUM`](nlohmann_json_serialize_enum.md). Data written without the macro can therefore
+    still be read after enabling it.
+
+!!! warning "Keys must serialize to distinct strings"
+
+    Each key is converted with the enum's `to_json` function. If a key is not converted to a string (for instance, an
+    enum without [`NLOHMANN_JSON_SERIALIZE_ENUM`](nlohmann_json_serialize_enum.md), which is stored as an integer, or an
+    enumerator mapped to `nullptr`), [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) is thrown.
+    If two keys are converted to the same string (for instance, because
+    [`NLOHMANN_JSON_SERIALIZE_ENUM`](nlohmann_json_serialize_enum.md) maps an unlisted enumerator to the first entry),
+    [`type_error.318`](../../home/exceptions.md#jsonexceptiontype_error318) is thrown. In both cases, the target value
+    is not changed.
+
+!!! warning "Opt-in only"
+
+    This macro must be defined **before** including `<nlohmann/json.hpp>`. Defining it after the include has no effect.
+
+!!! note "ABI compatibility"
+
+    The value of this macro is encoded in the [namespace](../../features/namespace.md) (tag `_ekmo`), resulting in
+    distinct symbol names. Translation units compiled with and without it can therefore be linked into the same program
+    without One Definition Rule (ODR) violations, but they cannot exchange instances of library types.
+
+## Examples
+
+??? example "Example: default behavior (macro not defined)"
+
+    Without the macro, a map with enum keys is stored as an array of pairs:
+
+    ```cpp
+    #include <map>
+    #include <nlohmann/json.hpp>
+
+    using json = nlohmann::json;
+
+    enum TaskState { TS_STOPPED, TS_RUNNING, TS_COMPLETED };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(TaskState, {
+        {TS_STOPPED, "stopped"},
+        {TS_RUNNING, "running"},
+        {TS_COMPLETED, "completed"},
+    })
+
+    int main()
+    {
+        std::map<TaskState, std::string> m = {{TS_STOPPED, "aa"}, {TS_COMPLETED, "bb"}};
+
+        json j = m;
+        // j is [["stopped","aa"],["completed","bb"]]
+    }
+    ```
+
+??? example "Example: objects for enum-keyed maps (macro defined to 1)"
+
+    With the macro, the same map is stored as an object:
+
+    ```cpp
+    #define JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS 1
+    #include <map>
+    #include <nlohmann/json.hpp>
+
+    using json = nlohmann::json;
+
+    enum TaskState { TS_STOPPED, TS_RUNNING, TS_COMPLETED };
+
+    NLOHMANN_JSON_SERIALIZE_ENUM(TaskState, {
+        {TS_STOPPED, "stopped"},
+        {TS_RUNNING, "running"},
+        {TS_COMPLETED, "completed"},
+    })
+
+    int main()
+    {
+        std::map<TaskState, std::string> m = {{TS_STOPPED, "aa"}, {TS_COMPLETED, "bb"}};
+
+        json j = m;
+        // j is {"completed":"bb","stopped":"aa"}
+
+        auto m2 = j.get<std::map<TaskState, std::string>>();
+        // m2 == m
+    }
+    ```
+
+## See also
+
+- [Specializing enum conversion](../../features/enum_conversion.md)
+- [**NLOHMANN_JSON_SERIALIZE_ENUM**](nlohmann_json_serialize_enum.md) - serialize/deserialize an enum
+- [**NLOHMANN_JSON_SERIALIZE_ENUM_STRICT**](nlohmann_json_serialize_enum_strict.md) - serialize/deserialize an enum with
+  exceptions
+
+## Version history
+
+- Added in version 3.13.0.
@@ -41,6 +41,9 @@ inline void from_json(const BasicJsonType& j, type& e);
      conversion. Select this default pair carefully. See example 1 below.
    - If an enum or JSON value is specified in multiple conversions, the first matching conversion from the top of the
      list will be returned when converting to or from JSON. See example 2 below.
+    - Maps with enum keys (e.g., `std::map<ENUM_TYPE, T>`) are stored as arrays of `[key, value]` pairs by default.
+      Define [`JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS`](json_use_objects_for_enum_keyed_maps.md) to store them as objects
+      with the converted keys. Such maps can be read from both forms.

 ## Examples

@@ -80,6 +83,7 @@ inline void from_json(const BasicJsonType& j, type& e);
 - [Specializing enum conversion](../../features/enum_conversion.md)
 - [`NLOHMANN_JSON_SERIALIZE_ENUM_STRICT`](./nlohmann_json_serialize_enum_strict.md)
 - [`JSON_DISABLE_ENUM_SERIALIZATION`](json_disable_enum_serialization.md)
+- [`JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS`](json_use_objects_for_enum_keyed_maps.md)

 ## Version history

@@ -44,6 +44,9 @@ inline void from_json(const BasicJsonType& j, type& e);
      `"enum value out of range for <type>"`.
    - If an enum or JSON value is specified in multiple conversions, the first matching conversion from the top of the
      list will be returned when converting to or from JSON. See example 2 below.
+    - Maps with enum keys (e.g., `std::map<ENUM_TYPE, T>`) are stored as arrays of `[key, value]` pairs by default.
+      Define [`JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS`](json_use_objects_for_enum_keyed_maps.md) to store them as objects
+      with the converted keys. Such maps can be read from both forms.

 ## Examples

@@ -99,6 +102,7 @@ inline void from_json(const BasicJsonType& j, type& e);
 - [Specializing enum conversion](../../features/enum_conversion.md)
 - [`NLOHMANN_JSON_SERIALIZE_ENUM`](./nlohmann_json_serialize_enum.md)
 - [`JSON_DISABLE_ENUM_SERIALIZATION`](json_disable_enum_serialization.md)
+- [`JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS`](json_use_objects_for_enum_keyed_maps.md)

 ## Version history

@@ -1,38 +0,0 @@
-# <small>nlohmann::</small>ordered_json_document
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-using ordered_json_document = basic_json_document<ordered_json>;
-```
-
-This type is a [`basic_json_document`](basic_json_document/index.md) of the [`ordered_json`](ordered_json.md)
-specialization: [`materialize()`](basic_json_view/materialize.md) on one of its views preserves the insertion order
-of object keys, instead of sorting them like [`json_document`](json_document.md) does.
-
-## Examples
-
-??? example
-
-    The example below demonstrates how `ordered_json_document` preserves the insertion order of object keys when
-    materializing.
-
-    ```cpp
-    --8<-- "examples/ordered_json_document.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/ordered_json_document.output"
-    ```
-
-## See also
-
- [ordered_json_view](ordered_json_view.md) - a view of a value of an `ordered_json_document`
- [json_document](json_document.md) - the corresponding document for the default `json` specialization
- [Object Order](../features/object_order.md)
-
-## Version history
-
-Since version 3.13.0.
@@ -1,35 +0,0 @@
-# <small>nlohmann::</small>ordered_json_view
-
-<small>Defined in header `<nlohmann/json_view.hpp>`</small>
-
-```cpp
-using ordered_json_view = basic_json_view<ordered_json>;
-```
-
-This type is a [`basic_json_view`](basic_json_view/index.md) of a value of an
-[`ordered_json_document`](ordered_json_document.md).
-
-## Examples
-
-??? example
-
-    The example below demonstrates how to use the type `nlohmann::ordered_json_view`.
-
-    ```cpp
-    --8<-- "examples/ordered_json_view.cpp"
-    ```
-
-    Output:
-
-    ```json
-    --8<-- "examples/ordered_json_view.output"
-    ```
-
-## See also
-
- [ordered_json_document](ordered_json_document.md) - the document type this view refers into
- [json_view](json_view.md) - the corresponding view for `json_document`
-
-## Version history
-
-Since version 3.13.0.
@@ -21,17 +21,18 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
      
        | Compiler                                     | Architecture | Operating System                  | CI        |
        |----------------------------------------------|--------------|-----------------------------------|-----------|
-        | AppleClang 15.0.0.15000040; Xcode 15.0.1     | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
-        | AppleClang 15.0.0.15000100; Xcode 15.1       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
-        | AppleClang 15.0.0.15000100; Xcode 15.2       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
-        | AppleClang 15.0.0.15000309; Xcode 15.3       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
-        | AppleClang 15.0.0.15000309; Xcode 15.4       | arm64        | macOS 14.7.2 (Sonoma)             | GitHub    |
        | AppleClang 16.0.0.16000026; Xcode 16         | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
        | AppleClang 16.0.0.16000026; Xcode 16.1       | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
        | AppleClang 16.0.0.16000026; Xcode 16.2       | arm64        | macOS 15.2 (Sequoia)              | GitHub    |
        | AppleClang 17.0.0.17000013; Xcode 16.3       | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
        | AppleClang 17.0.0.17000013; Xcode 16.4       | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
        | AppleClang 17.0.0.17000319; Xcode 26.0.1     | arm64        | macOS 15.5 (Sequoia)              | GitHub    |
+        | AppleClang 17.0.0.17000404; Xcode 26.1.1     | arm64        | macOS 15.7.9 (Sequoia)            | GitHub    |
+        | AppleClang 17.0.0.17000603; Xcode 26.2       | arm64        | macOS 15.7.9 (Sequoia)            | GitHub    |
+        | AppleClang 17.0.0.17000604; Xcode 26.3       | arm64        | macOS 15.7.9 (Sequoia)            | GitHub    |
+        | AppleClang 21.0.0.21000099; Xcode 26.4.1     | arm64        | macOS 26.6.2 (Tahoe)              | GitHub    |
+        | AppleClang 21.0.0.21000101; Xcode 26.5       | arm64        | macOS 26.6.2 (Tahoe)              | GitHub    |
+        | AppleClang 21.0.0.21000101; Xcode 26.6       | arm64        | macOS 26.6.2 (Tahoe)              | GitHub    |
        | Clang 3.4.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
        | Clang 3.5.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
        | Clang 3.6.2                                  | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
@@ -89,7 +90,7 @@ Note: Some modern features (like C++20 ranges or filesystem support) may be disa
        | GNU 13.3.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
        | GNU 14.2.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
        | GNU 15.1.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
-        | GNU 16.1.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
+        | GNU 16.2.0                                   | x86_64       | Ubuntu 22.04.1 LTS                | GitHub    |
        | GNU 16.1.0                                   | arm64        | Ubuntu 24.04                      | GitHub    |
        | icpc (ICC) 2021.10.0 20230609                | x86_64       | Ubuntu 22.04 LTS                  | GitHub    |
        | icpx (Intel oneAPI DPC++/C++) 2025.3.2       | x86_64       | Ubuntu 24.04 LTS                  | GitHub    |
@@ -64,6 +64,8 @@ The following macros guard changes that are planned to become the default in ver
 | [`JSON_PRECISE_STREAM_POSITION`](../api/macros/json_precise_stream_position.md)                                  | `0`         | `1`: reading from a stream does not consume the character after a number                                                      | –                                                                                                                  | 3.13.0 |
 | [`JSON_STRICT_NUL_HANDLING`](../api/macros/json_strict_nul_handling.md)                                          | `0`         | `1`: a NUL byte in the input is a parse error instead of the end of input                                                     | [`JSON_StrictNulHandling`](../integration/cmake.md#json_strictnulhandling)                                         | 3.13.0 |
 | [`JSON_STRICT_BINARY_UTF8`](../api/macros/json_strict_binary_utf8.md)                                            | `0`         | `1`: `to_cbor`, `to_ubjson`, `to_bjdata`, and `to_bson` throw for strings that are not valid UTF-8 by default                 | [`JSON_StrictBinaryUTF8`](../integration/cmake.md#json_strictbinaryutf8)                                           | 3.13.0 |
+| [`JSON_DISABLE_TUPLE_REFERENCE_CONVERSION`](../api/macros/json_disable_tuple_reference_conversion.md)            | `0`         | `1`: a `basic_json` value can no longer be created from a one-element tuple of a reference to it, such as `std::forward_as_tuple(j)`| [`JSON_DisableTupleReferenceConversion`](../integration/cmake.md#json_disabletuplereferenceconversion)             | 3.13.0 |
+| [`JSON_DELETE_DEPRECATED_FUNCTIONS`](../api/macros/json_delete_deprecated_functions.md)                          | `0`         | removed: the deprecated functions are removed (see below); the `from_*(ptr, len)` overloads stay deleted                      | [`JSON_DeleteDeprecatedFunctions`](../integration/cmake.md#json_deletedeprecatedfunctions)                         | 3.13.0 |

 For example, the following makes a 3.x release behave like version 4.0 with respect to these changes:

@@ -75,6 +77,8 @@ For example, the following makes a 3.x release behave like version 4.0 with resp
 #define JSON_PRECISE_STREAM_POSITION 1
 #define JSON_STRICT_NUL_HANDLING 1
 #define JSON_STRICT_BINARY_UTF8 1
+#define JSON_DISABLE_TUPLE_REFERENCE_CONVERSION 1
+#define JSON_DELETE_DEPRECATED_FUNCTIONS 1
 #include <nlohmann/json.hpp>
 ```

@@ -84,8 +88,13 @@ way to achieve this.
 ### Removal of deprecated functions

 Version 4.0 will remove all deprecated functions. Compiling with deprecation warnings enabled shows which of them your
-code still uses. The [migration guide](../integration/migration_guide.md#replace-deprecated-functions) shows how to
-replace each of them.
+code still uses. Defining [`JSON_DELETE_DEPRECATED_FUNCTIONS`](../api/macros/json_delete_deprecated_functions.md) to
+`1` turns these warnings into errors, as the deprecated functions are then deleted. The
+[migration guide](../integration/migration_guide.md#replace-deprecated-functions) shows how to replace each of them.
+
+The `from_*` overloads taking a pointer and a length are not removed in version 4.0, but stay deleted. Without them, a
+call like `from_cbor(ptr, len)` would still compile: it would read `ptr` as a NUL-terminated string and convert `len`
+to the `strict` parameter.

 | Deprecated                                                                                                                                                                                                                                         | Since  | Migration                                                                        |
 |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------------------------------------------------------------------|
@@ -97,6 +106,7 @@ replace each of them.
 | [`json_pointer::operator string_t`](../api/json_pointer/operator_string_t.md)                                                                                                                                                                      | 3.11.0 | [JSON Pointers](../integration/migration_guide.md#json-pointers)                 |
 | [`json_pointer`](../api/json_pointer/index.md) with a `basic_json` type as template argument, and the overloads of `value`, `contains`, `operator[]`, and `at` accepting such a pointer                                                           | 3.11.0 | [JSON Pointers](../integration/migration_guide.md#json-pointers)                 |
 | Comparing a [`json_pointer`](../api/json_pointer/index.md) with a string via [`operator==`](../api/json_pointer/operator_eq.md) or [`operator!=`](../api/json_pointer/operator_ne.md)                                                              | 3.11.2 | [JSON Pointers](../integration/migration_guide.md#json-pointers)                 |
+| [`from_bjdata`](../api/basic_json/from_bjdata.md) and [`from_bon8`](../api/basic_json/from_bon8.md) with `(ptr, len)`                                                                                                                              | 3.13.0 | [Parsing](../integration/migration_guide.md#parsing)                             |

 The deprecated legacy comparison of discarded values is controlled by a macro and therefore listed in the table above.

@@ -1,19 +0,0 @@
-#include <iostream>
-#include <nlohmann/json.hpp>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    // accept() behaves exactly like basic_json::accept(): the same inputs are
-    // accepted or rejected, with the same ignore_comments/ignore_trailing_commas
-    // options
-    std::cout << json_document::accept(R"({"a": 1})") << '\n';
-    std::cout << json_document::accept(R"({"a": 1,})") << '\n'; // trailing comma: rejected by default
-    std::cout << json_document::accept(R"({"a": 1,})", false, true) << '\n'; // ignore_trailing_commas
-
-    std::cout << (json_document::accept(R"({"a": 1})") == nlohmann::json::accept(R"({"a": 1})")) << '\n';
-}
@@ -1,4 +0,0 @@
-true
-false
-true
-true
@@ -1,23 +0,0 @@
-#include <iostream>
-#include <utility>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    // the default constructor creates an empty (discarded) document
-    json_document empty;
-    std::cout << empty.is_discarded() << '\n';
-
-    // json_document is move-only: parse() itself returns by value (moved out),
-    // and a document can be moved again, e.g. into a container
-    json_document doc = json_document::parse(R"({"a": 1})");
-    json_document moved = std::move(doc);
-    std::cout << moved.root().is_object() << '\n';
-
-    // copying is disabled at compile time:
-    // json_document another = moved; // does not compile
-}
@@ -1,2 +0,0 @@
-true
-true
@@ -1,19 +0,0 @@
-#include <iostream>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    // with allow_exceptions == false, a parse error produces a discarded
-    // document instead of throwing -- exactly like basic_json::parse()
-    json_document doc = json_document::parse(R"({"a": )", /* allow_exceptions */ false);
-    std::cout << doc.is_discarded() << '\n';
-    std::cout << doc.root().is_discarded() << '\n';
-
-    // a successful parse is never discarded
-    json_document ok = json_document::parse(R"({"a": 1})", false);
-    std::cout << ok.is_discarded() << '\n';
-}
@@ -1,3 +0,0 @@
-true
-true
-false
@@ -1,28 +0,0 @@
-#include <iostream>
-#include <string>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    // long enough that copying it needs a real (heap) allocation, so the
-    // comparison below does not depend on the standard library's small
-    // string optimization threshold
-    const std::string text = std::string(200, ' ') + "[1, 2, 3, 4, 5]";
-
-    // memory_usage() is not portable across platforms/allocators/compilers, so
-    // compare it relatively instead of printing the raw byte count
-    json_document borrowed = json_document::parse(text);
-    json_document owned = json_document::parse_copy(text);
-
-    // the owned document additionally stores its own copy of the source text
-    std::cout << (owned.memory_usage() > borrowed.memory_usage()) << '\n';
-
-    // a document with more values needs a larger index
-    json_document small = json_document::parse(std::string("[1]"));
-    json_document large = json_document::parse(std::string("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]"));
-    std::cout << (large.memory_usage() > small.memory_usage()) << '\n';
-}
@@ -1,2 +0,0 @@
-true
-true
@@ -1,15 +0,0 @@
-#include <iostream>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    // node_count() is the size of the flat index: one 16-byte node per value,
-    // plus one per object key (values and keys are all the index stores)
-    json_document scalar = json_document::parse("42");
-    std::cout << scalar.node_count() << '\n';
-
-    json_document doc = json_document::parse(R"({"a": 1, "b": [1, 2]})");
-    std::cout << doc.node_count() << '\n';
-}
@@ -1,2 +0,0 @@
-1
-7
@@ -1,24 +0,0 @@
-#include <iostream>
-#include <string>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    std::string text = R"({"a": 1})";
-
-    // borrowed: the document only points into `text`; `text` must outlive it
-    json_document borrowed = json_document::parse(text);
-    std::cout << borrowed.owns_source() << '\n';
-
-    // owned: parse_copy() always takes its own copy
-    json_document copied = json_document::parse_copy(text);
-    std::cout << copied.owns_source() << '\n';
-
-    // owned: an rvalue std::string is moved in, not copied, but still owned
-    json_document moved_in = json_document::parse(std::string(text));
-    std::cout << moved_in.owns_source() << '\n';
-}
@@ -1,3 +0,0 @@
-false
-true
-true
@@ -1,33 +0,0 @@
-#include <iostream>
-#include <string>
-#include <nlohmann/json.hpp>
-#include <nlohmann/json_view.hpp>
-
-using json_document = nlohmann::json_document;
-
-int main()
-{
-    std::cout << std::boolalpha;
-
-    // an lvalue std::string is BORROWED: the document only stores a pointer
-    // into `text`, so `text` must outlive `borrowed`
-    std::string text = R"({"count": 3})";
-    json_document borrowed = json_document::parse(text);
-    std::cout << borrowed.owns_source() << '\n'; // false
-
-    // an rvalue std::string is MOVED into the document -- no copy of the text
-    json_document owned = json_document::parse(std::string(R"({"count": 3})"));
-    std::cout << owned.owns_source() << '\n'; // true
-
-    // errors are identical to basic_json::parse: same exception id, message,
-    // and position, because the library parser runs on the same bytes on a
-    // failing input
-    try
-    {
-        static_cast<void>(json_document::parse(R"({"count": )"));
-    }
-    catch (const nlohmann::json::parse_error& e)
-    {
-        std::cout << e.id << '\n';
-    }
-}