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Niels Lohmann 4971200b54 Add images of json_documents: save() and load() (#5632) 
* Add images of json_documents: save() and load()

An image is a document stored so that loading it needs no
parsing: save() writes the node index, the text and the decoded
strings; the static load() reads an image written by save().

load() takes a pointer and size, a borrowed vector, or an owned
rvalue vector; the nodes are copied so they are aligned and can
be edited, while the text and decoded strings stay in the image.

image_check controls how much load() trusts the input: full
checks structure, bounds, strings and numbers, the parser's own
guarantees; bounds checks structure and bounds only; none skips
all checks, for images from a trusted source.

Layout is little-endian only ("NJVI" header, nodes, text, decoded
strings), following the idea of zero-copy formats such as
FlatBuffers and YaFF; the check follows FlatBuffers' Verifier.

New errors: parse_error.116 for a malformed image or a failed
check, type_error.320 for a discarded document or a big-endian
target.

A dedicated fuzzer and 6,000 seeded corruptions, checked under
ASan/UBSan, found and fixed two gaps: unchecked reserved header
fields, and unbounded null/boolean offsets that could make
dump() throw std::length_error.

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

* Fix MSVC errors in image test and add image_check doc anchor

Move the raw string literal out of the CHECK macro (MSVC preprocessor),
cast 64-bit header fields to std::size_t (C4244 on 32-bit), and give the
image_check section in load.md a real anchor for the mkdocs strict build.

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

* Check each distinct string and float range once in the full image check

The full check scanned the contents of every string node and every float token over its own range, so many nodes pointing to one large range made load() quadratic. The structural walk now only collects the ranges; after it, each kind is sorted and checked once per distinct range. Ranges of one kind that overlap without being identical are rejected, as save() never writes them (nodes that share a value share the whole range). The cost is linear in the size of the image plus sorting the ranges.

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

* Adapt the image tests to named documents and last-wins lookups

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

* Test that the targets of links never reach an image

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

* Test lookups in loaded images with duplicate and colliding keys

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

* Release the list of large objects once load() has built the indexes

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

* Test that invalid UTF-8 of a loaded image is not copied into an editable document

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

* Document that editable documents refuse invalid UTF-8 copied from a loaded image

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

* Expect first-wins lookups in the image tests

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

* Avoid useless casts of header fields in the image tests

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

* Fix clang-tidy 22 findings in unit-json_view_image.cpp and image.hpp

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

* Fix MSVC C4244 and C2017 in the image test

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

* Fix the indentation of a loop in the image test

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

* Make json_view.hpp pass include-what-you-use

ci_single_binaries runs IWYU with --error on every header. For json_view.hpp
it suggested adding <array> (std::array is used), the headers that json.hpp
already provides (abi_config, abi_macros, input_adapters, json_pointer,
cpp_future, string_concat, value_t, json_fwd), and <version> for
std::nullptr_t, and removing <cstddef>.

- include <array>
- keep <cstddef> (nullptr_t, size_t; IWYU attributes them to <version> and <cstring>)
- tell IWYU not to suggest the headers that json.hpp provides: the amalgamated
  json_view.hpp only includes json.hpp, so including them here would duplicate
  their definitions
- drop edit_storage.hpp, which edit.hpp includes

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

* Silence a clang-tidy C++17 finding in the image test

bugprone-suspicious-stringview-data-usage flags data() of the source view
under C++17, although the length is passed and checked by the REQUIRE
before it.

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

* Build the image link test without exceptions

load_result() exists only with exceptions; with JSON_NOEXCEPTION the test
loads the image with the check directly (a failed check aborts).

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

* Regenerate the amalgamated headers

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

* Follow the renames from the review of the view builder

The review of #5620 renamed document_data's tape/tape_size/tape_cap to
nodes/node_count/node_capacity and made the decode arena a
std::vector<char>; adapt the code of this change to it.

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

* Rename the emit lambda in the image writer for Qt compatibility

Qt defines emit as an empty macro, so a Qt header included before
json_view.hpp broke the lambda's declaration (see #5865). The slots
variables in the image tests are renamed as well.

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

* Address the review of json_document images

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

* Regenerate the amalgamated headers

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

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-10-21 10:21:29 +02:00

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# Project information
site_name: JSON for Modern C++
site_author: Niels Lohmann
site_url: https://json.nlohmann.me/
# Repository
repo_name: nlohmann/json
repo_url: https://github.com/nlohmann/json
edit_uri: edit/develop/docs/mkdocs/docs
# Copyright
copyright: Copyright &copy; 2013-2026 Niels Lohmann
# Configuration
theme:
name: material
language: en
palette:
- media: '(prefers-color-scheme: light)'
scheme: default
primary: indigo
accent: indigo
toggle:
icon: material/brightness-7
name: Switch to dark mode
- media: '(prefers-color-scheme: dark)'
scheme: slate
primary: indigo
accent: indigo
toggle:
icon: material/brightness-4
name: Switch to light mode
icon:
repo: fontawesome/brands/github
font:
text: Roboto
code: JetBrains Mono
features:
- navigation.instant
- navigation.tracking
- navigation.tabs
- navigation.indexes
- navigation.top
- content.tabs.link
- content.action.edit
- content.action.view
nav:
- Home:
- index.md
- home/license.md
- "FAQ": home/faq.md
- home/exceptions.md
- home/releases.md
- home/design_goals.md
- home/architecture.md
- home/customers.md
- home/sponsors.md
- home/debugging.md
- Features:
- features/index.md
- features/arbitrary_types.md
- Binary Formats:
- features/binary_formats/index.md
- features/binary_formats/bjdata.md
- features/binary_formats/bon8.md
- features/binary_formats/bson.md
- features/binary_formats/cbor.md
- features/binary_formats/messagepack.md
- features/binary_formats/ubjson.md
- features/binary_values.md
- features/comments.md
- features/conversions.md
- features/creating_values.md
- Element Access:
- features/element_access/index.md
- features/element_access/unchecked_access.md
- features/element_access/checked_access.md
- features/element_access/default_value.md
- features/iterators.md
- features/merge_patch.md
- features/json_patch.md
- features/json_pointer.md
- features/modifying_values.md
- features/modules.md
- 'nlohmann Namespace': features/namespace.md
- features/object_order.md
- features/performance.md
- Parsing:
- features/parsing/index.md
- features/parsing/json_lines.md
- features/parsing/parse_exceptions.md
- features/parsing/parser_callbacks.md
- features/parsing/sax_interface.md
- features/parsing/untrusted_input.md
- features/assertions.md
- features/serialization.md
- features/enum_conversion.md
- features/macros.md
- features/trailing_commas.md
- Types:
- features/types/index.md
- features/types/number_handling.md
- features/types/template_parameters.md
- features/json_view.md
- Integration:
- integration/index.md
- integration/migration_guide.md
- integration/cmake.md
- integration/package_managers.md
- integration/pkg-config.md
- integration/compile_times.md
- API Documentation:
- basic_json:
- 'Overview': api/basic_json/index.md
- '(Constructor)': api/basic_json/basic_json.md
- '(Destructor)': api/basic_json/~basic_json.md
- 'accept': api/basic_json/accept.md
- 'array': api/basic_json/array.md
- 'array_t': api/basic_json/array_t.md
- 'as_base_class': api/basic_json/as_base_class.md
- 'at': api/basic_json/at.md
- 'back': api/basic_json/back.md
- 'begin': api/basic_json/begin.md
- 'binary': api/basic_json/binary.md
- 'binary_t': api/basic_json/binary_t.md
- 'boolean_t': api/basic_json/boolean_t.md
- 'cbegin': api/basic_json/cbegin.md
- 'cbor_tag_handler_t': api/basic_json/cbor_tag_handler_t.md
- 'cend': api/basic_json/cend.md
- 'clear': api/basic_json/clear.md
- 'contains': api/basic_json/contains.md
- 'count': api/basic_json/count.md
- 'crbegin': api/basic_json/crbegin.md
- 'crend': api/basic_json/crend.md
- 'default_object_comparator_t': api/basic_json/default_object_comparator_t.md
- 'diff': api/basic_json/diff.md
- 'dump': api/basic_json/dump.md
- 'emplace': api/basic_json/emplace.md
- 'emplace_back': api/basic_json/emplace_back.md
- 'empty': api/basic_json/empty.md
- 'end': api/basic_json/end.md
- 'end_pos': api/basic_json/end_pos.md
- 'erase': api/basic_json/erase.md
- 'error_handler_t': api/basic_json/error_handler_t.md
- 'exception': api/basic_json/exception.md
- 'find': api/basic_json/find.md
- 'flatten': api/basic_json/flatten.md
- 'format_as': api/basic_json/format_as.md
- 'from_bjdata': api/basic_json/from_bjdata.md
- 'from_bon8': api/basic_json/from_bon8.md
- 'from_bson': api/basic_json/from_bson.md
- 'from_cbor': api/basic_json/from_cbor.md
- 'from_msgpack': api/basic_json/from_msgpack.md
- 'from_ubjson': api/basic_json/from_ubjson.md
- 'front': api/basic_json/front.md
- 'get': api/basic_json/get.md
- 'get_allocator': api/basic_json/get_allocator.md
- 'get_binary': api/basic_json/get_binary.md
- 'get_ptr': api/basic_json/get_ptr.md
- 'get_ref': api/basic_json/get_ref.md
- 'get_to': api/basic_json/get_to.md
- 'std::formatter&lt;basic_json&gt;': api/basic_json/std_formatter.md
- 'std::hash&lt;basic_json&gt;': api/basic_json/std_hash.md
- 'input_format_t': api/basic_json/input_format_t.md
- 'insert': api/basic_json/insert.md
- 'invalid_iterator': api/basic_json/invalid_iterator.md
- 'is_array': api/basic_json/is_array.md
- 'is_binary': api/basic_json/is_binary.md
- 'is_boolean': api/basic_json/is_boolean.md
- 'is_discarded': api/basic_json/is_discarded.md
- 'is_null': api/basic_json/is_null.md
- 'is_number': api/basic_json/is_number.md
- 'is_number_float': api/basic_json/is_number_float.md
- 'is_number_integer': api/basic_json/is_number_integer.md
- 'is_number_unsigned': api/basic_json/is_number_unsigned.md
- 'is_object': api/basic_json/is_object.md
- 'is_primitive': api/basic_json/is_primitive.md
- 'is_string': api/basic_json/is_string.md
- 'is_structured': api/basic_json/is_structured.md
- 'items': api/basic_json/items.md
- 'json_base_class_t': api/basic_json/json_base_class_t.md
- 'json_serializer': api/basic_json/json_serializer.md
- 'max_size': api/basic_json/max_size.md
- 'meta': api/basic_json/meta.md
- 'merge_diff': api/basic_json/merge_diff.md
- 'merge_patch': api/basic_json/merge_patch.md
- 'number_float_t': api/basic_json/number_float_t.md
- 'number_integer_t': api/basic_json/number_integer_t.md
- 'number_unsigned_t': api/basic_json/number_unsigned_t.md
- 'object': api/basic_json/object.md
- 'object_comparator_t': api/basic_json/object_comparator_t.md
- 'object_t': api/basic_json/object_t.md
- 'operator ValueType': api/basic_json/operator_ValueType.md
- 'operator value_t': api/basic_json/operator_value_t.md
- 'operator[]': api/basic_json/operator[].md
- 'operator=': api/basic_json/operator=.md
- 'operator+=': api/basic_json/operator+=.md
- 'operator==': api/basic_json/operator_eq.md
- 'operator!=': api/basic_json/operator_ne.md
- 'operator<': api/basic_json/operator_lt.md
- 'operator>': api/basic_json/operator_gt.md
- 'operator<=': api/basic_json/operator_le.md
- 'operator>=': api/basic_json/operator_ge.md
- 'operator<=>': api/basic_json/operator_spaceship.md
- 'out_of_range': api/basic_json/out_of_range.md
- 'other_error': api/basic_json/other_error.md
- 'parse': api/basic_json/parse.md
- 'parse_error': api/basic_json/parse_error.md
- 'parse_event_t': api/basic_json/parse_event_t.md
- 'parser_callback_t': api/basic_json/parser_callback_t.md
- 'patch': api/basic_json/patch.md
- 'patch_inplace': api/basic_json/patch_inplace.md
- 'push_back': api/basic_json/push_back.md
- 'rbegin': api/basic_json/rbegin.md
- 'rend': api/basic_json/rend.md
- 'sax_parse': api/basic_json/sax_parse.md
- 'size': api/basic_json/size.md
- 'start_pos': api/basic_json/start_pos.md
- 'string_t': api/basic_json/string_t.md
- 'swap': api/basic_json/swap.md
- 'std::swap&lt;basic_json&gt;': api/basic_json/std_swap.md
- 'to_bjdata': api/basic_json/to_bjdata.md
- 'to_bon8': api/basic_json/to_bon8.md
- 'to_bson': api/basic_json/to_bson.md
- 'to_cbor': api/basic_json/to_cbor.md
- 'to_msgpack': api/basic_json/to_msgpack.md
- 'to_string': api/basic_json/to_string.md
- 'to_ubjson': api/basic_json/to_ubjson.md
- 'type': api/basic_json/type.md
- 'type_error': api/basic_json/type_error.md
- 'type_name': api/basic_json/type_name.md
- 'unflatten': api/basic_json/unflatten.md
- 'update': api/basic_json/update.md
- 'value': api/basic_json/value.md
- 'value_t': api/basic_json/value_t.md
- 'with_t': api/basic_json/with_t.md
- basic_json_document:
- 'Overview': api/basic_json_document/index.md
- '(Constructor)': api/basic_json_document/basic_json_document.md
- 'accept': api/basic_json_document/accept.md
- 'erase': api/basic_json_document/erase.md
- 'insert': api/basic_json_document/insert.md
- 'is_discarded': api/basic_json_document/is_discarded.md
- 'load': api/basic_json_document/load.md
- 'memory_usage': api/basic_json_document/memory_usage.md
- 'node_count': api/basic_json_document/node_count.md
- 'owns_source': api/basic_json_document/owns_source.md
- 'parse': api/basic_json_document/parse.md
- 'parse_copy': api/basic_json_document/parse_copy.md
- 'push_back': api/basic_json_document/push_back.md
- 'read': api/basic_json_document/read.md
- 'root': api/basic_json_document/root.md
- 'save': api/basic_json_document/save.md
- 'set': api/basic_json_document/set.md
- 'shrink_to_fit': api/basic_json_document/shrink_to_fit.md
- 'source': api/basic_json_document/source.md
- basic_json_view:
- 'Overview': api/basic_json_view/index.md
- '(Constructor)': api/basic_json_view/basic_json_view.md
- 'at': api/basic_json_view/at.md
- 'back': api/basic_json_view/back.md
- 'begin': api/basic_json_view/begin.md
- 'cbegin': api/basic_json_view/cbegin.md
- 'cend': api/basic_json_view/cend.md
- 'contains': api/basic_json_view/contains.md
- 'count': api/basic_json_view/count.md
- 'dump': api/basic_json_view/dump.md
- 'empty': api/basic_json_view/empty.md
- 'end': api/basic_json_view/end.md
- 'find': api/basic_json_view/find.md
- 'front': api/basic_json_view/front.md
- 'get': api/basic_json_view/get.md
- 'get_string': api/basic_json_view/get_string.md
- 'get_to': api/basic_json_view/get_to.md
- 'is_array': api/basic_json_view/is_array.md
- 'is_binary': api/basic_json_view/is_binary.md
- 'is_boolean': api/basic_json_view/is_boolean.md
- 'is_discarded': api/basic_json_view/is_discarded.md
- 'is_null': api/basic_json_view/is_null.md
- 'is_number': api/basic_json_view/is_number.md
- 'is_number_float': api/basic_json_view/is_number_float.md
- 'is_number_integer': api/basic_json_view/is_number_integer.md
- 'is_number_unsigned': api/basic_json_view/is_number_unsigned.md
- 'is_object': api/basic_json_view/is_object.md
- 'is_primitive': api/basic_json_view/is_primitive.md
- 'is_string': api/basic_json_view/is_string.md
- 'is_structured': api/basic_json_view/is_structured.md
- 'items': api/basic_json_view/items.md
- 'materialize': api/basic_json_view/materialize.md
- 'number_format': api/basic_json_view/number_format.md
- 'number_token': api/basic_json_view/number_token.md
- 'operator<<': api/basic_json_view/operator_ltlt.md
- 'operator[]': api/basic_json_view/operator[].md
- 'operator==': api/basic_json_view/operator_eq.md
- 'operator!=': api/basic_json_view/operator_ne.md
- 'size': api/basic_json_view/size.md
- 'source_offset': api/basic_json_view/source_offset.md
- 'type': api/basic_json_view/type.md
- 'type_name': api/basic_json_view/type_name.md
- 'value': api/basic_json_view/value.md
- byte_container_with_subtype:
- 'Overview': api/byte_container_with_subtype/index.md
- '(constructor)': api/byte_container_with_subtype/byte_container_with_subtype.md
- 'clear_subtype': api/byte_container_with_subtype/clear_subtype.md
- 'has_subtype': api/byte_container_with_subtype/has_subtype.md
- 'operator==': api/byte_container_with_subtype/operator_eq.md
- 'operator!=': api/byte_container_with_subtype/operator_ne.md
- 'set_subtype': api/byte_container_with_subtype/set_subtype.md
- 'subtype': api/byte_container_with_subtype/subtype.md
- adl_serializer:
- 'Overview': api/adl_serializer/index.md
- 'from_json': api/adl_serializer/from_json.md
- 'to_json': api/adl_serializer/to_json.md
- 'json': api/json.md
- 'json_document': api/json_document.md
- 'json_editable_document': api/json_editable_document.md
- 'json_editable_view': api/json_editable_view.md
- json_pointer:
- 'Overview': api/json_pointer/index.md
- '(Constructor)': api/json_pointer/json_pointer.md
- 'back': api/json_pointer/back.md
- 'empty': api/json_pointer/empty.md
- 'front': api/json_pointer/front.md
- 'operator string_t': api/json_pointer/operator_string_t.md
- 'operator==': api/json_pointer/operator_eq.md
- 'operator!=': api/json_pointer/operator_ne.md
- 'operator<=>': api/json_pointer/operator_spaceship.md
- 'operator/': api/json_pointer/operator_slash.md
- 'operator/=': api/json_pointer/operator_slasheq.md
- 'parent_pointer': api/json_pointer/parent_pointer.md
- 'pop_back': api/json_pointer/pop_back.md
- 'pop_front': api/json_pointer/pop_front.md
- 'push_back': api/json_pointer/push_back.md
- 'push_front': api/json_pointer/push_front.md
- 'string_t': api/json_pointer/string_t.md
- 'to_string': api/json_pointer/to_string.md
- json_sax:
- 'Overview': api/json_sax/index.md
- 'binary': api/json_sax/binary.md
- 'boolean': api/json_sax/boolean.md
- 'end_array': api/json_sax/end_array.md
- 'end_object': api/json_sax/end_object.md
- 'key': api/json_sax/key.md
- 'null': api/json_sax/null.md
- 'number_float': api/json_sax/number_float.md
- 'number_integer': api/json_sax/number_integer.md
- 'number_unsigned': api/json_sax/number_unsigned.md
- 'parse_error': api/json_sax/parse_error.md
- 'start_array': api/json_sax/start_array.md
- 'start_object': api/json_sax/start_object.md
- 'string': api/json_sax/string.md
- 'json_view': api/json_view.md
- 'operator<<(basic_json), operator<<(json_pointer)': api/operator_ltlt.md
- 'operator>>(basic_json)': api/operator_gtgt.md
- 'operator""_json': api/operator_literal_json.md
- 'operator""_json_pointer': api/operator_literal_json_pointer.md
- 'ordered_json': api/ordered_json.md
- 'ordered_json_document': api/ordered_json_document.md
- 'ordered_json_editable_document': api/ordered_json_editable_document.md
- 'ordered_json_editable_view': api/ordered_json_editable_view.md
- 'ordered_json_view': api/ordered_json_view.md
- 'ordered_map': api/ordered_map.md
- macros:
- 'Overview': api/macros/index.md
- 'JSON_ASSERT': api/macros/json_assert.md
- 'JSON_BRACE_INIT_COPY_SEMANTICS': api/macros/json_brace_init_copy_semantics.md
- 'JSON_CATCH_USER, JSON_THROW_USER, JSON_TRY_USER': api/macros/json_throw_user.md
- 'JSON_DIAGNOSTICS': api/macros/json_diagnostics.md
- 'JSON_DELETE_DEPRECATED_FUNCTIONS': api/macros/json_delete_deprecated_functions.md
- 'JSON_DIAGNOSTIC_POSITIONS': api/macros/json_diagnostic_positions.md
- 'JSON_DISABLE_ENUM_SERIALIZATION': api/macros/json_disable_enum_serialization.md
- 'JSON_DISABLE_STREAM_BULK_SCAN': api/macros/json_disable_stream_bulk_scan.md
- 'JSON_DISABLE_TUPLE_REFERENCE_CONVERSION': api/macros/json_disable_tuple_reference_conversion.md
- 'JSON_DISABLE_UNLOCKED_FILE_IO': api/macros/json_disable_unlocked_file_io.md
- 'JSON_HAS_CPP_11, JSON_HAS_CPP_14, JSON_HAS_CPP_17, JSON_HAS_CPP_20, JSON_HAS_CPP_23, JSON_HAS_CPP_26': api/macros/json_has_cpp_11.md
- 'JSON_HAS_EXPERIMENTAL_FILESYSTEM, JSON_HAS_FILESYSTEM': api/macros/json_has_filesystem.md
- 'JSON_HAS_RANGE_VIEW_CONVERSION': api/macros/json_has_range_view_conversion.md
- 'JSON_HAS_RANGES': api/macros/json_has_ranges.md
- 'JSON_HAS_STATIC_RTTI': api/macros/json_has_static_rtti.md
- 'JSON_HAS_STD_FORMAT': api/macros/json_has_std_format.md
- 'JSON_HAS_THREE_WAY_COMPARISON': api/macros/json_has_three_way_comparison.md
- 'JSON_NO_AUTOMATIC_UDLS': api/macros/json_no_automatic_udls.md
- 'JSON_NOEXCEPTION': api/macros/json_noexception.md
- 'JSON_NO_IO': api/macros/json_no_io.md
- 'JSON_NO_THREAD_LOCAL': api/macros/json_no_thread_local.md
- 'JSON_PRECISE_STREAM_POSITION': api/macros/json_precise_stream_position.md
- 'JSON_SKIP_LIBRARY_VERSION_CHECK': api/macros/json_skip_library_version_check.md
- 'JSON_SKIP_UNSUPPORTED_COMPILER_CHECK': api/macros/json_skip_unsupported_compiler_check.md
- 'JSON_STRICT_BINARY_UTF8': api/macros/json_strict_binary_utf8.md
- 'JSON_STRICT_NUL_HANDLING': api/macros/json_strict_nul_handling.md
- 'JSON_USE_GLOBAL_UDLS': api/macros/json_use_global_udls.md
- 'JSON_USE_IMPLICIT_CONVERSIONS': api/macros/json_use_implicit_conversions.md
- 'JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON': api/macros/json_use_legacy_discarded_value_comparison.md
- 'JSON_USE_OBJECTS_FOR_ENUM_KEYED_MAPS': api/macros/json_use_objects_for_enum_keyed_maps.md
- 'JSON_USE_SIMDUTF': api/macros/json_use_simdutf.md
- 'JSON_VIEW_NO_SIMD': api/macros/json_view_no_simd.md
- 'JSON_VIEW_USE_SSSE3': api/macros/json_view_use_ssse3.md
- 'NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_derived_type.md
- 'NLOHMANN_DEFINE_TYPE_INTRUSIVE, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_type_intrusive.md
- 'NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_type_non_intrusive.md
- 'NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES': api/macros/nlohmann_define_type_with_names.md
- 'NLOHMANN_JSON_NAMESPACE': api/macros/nlohmann_json_namespace.md
- 'NLOHMANN_JSON_NAMESPACE_BEGIN, NLOHMANN_JSON_NAMESPACE_END': api/macros/nlohmann_json_namespace_begin.md
- 'NLOHMANN_JSON_NAMESPACE_NO_VERSION': api/macros/nlohmann_json_namespace_no_version.md
- 'NLOHMANN_JSON_SERIALIZE_ENUM': api/macros/nlohmann_json_serialize_enum.md
- 'NLOHMANN_JSON_SERIALIZE_ENUM_STRICT': api/macros/nlohmann_json_serialize_enum_strict.md
- 'NLOHMANN_JSON_VERSION_MAJOR, NLOHMANN_JSON_VERSION_MINOR, NLOHMANN_JSON_VERSION_PATCH': api/macros/nlohmann_json_version_major.md
- Community:
- community/index.md
- community/ecosystem.md
- "Code of Conduct": community/code_of_conduct.md
- community/contribution_guidelines.md
- community/quality_assurance.md
- community/governance.md
- community/roadmap.md
- community/security_policy.md
- community/assurance_case.md
# Extras
extra:
social:
- icon: fontawesome/brands/github
link: https://github.com/nlohmann
- icon: fontawesome/brands/linkedin
link: https://www.linkedin.com/in/nielslohmann/
- icon: fontawesome/brands/xing
link: https://www.xing.com/profile/Niels_Lohmann
- icon: fontawesome/brands/paypal
link: https://www.paypal.me/nlohmann
generator: false
# Extensions
markdown_extensions:
- abbr
- admonition
- attr_list
- def_list
- codehilite:
guess_lang: false
- toc:
permalink: true
- md_in_html
- pymdownx.betterem:
smart_enable: all
- pymdownx.caret
- pymdownx.critic
- pymdownx.details
- pymdownx.emoji:
emoji_index: !!python/name:material.extensions.emoji.twemoji
emoji_generator: !!python/name:material.extensions.emoji.to_svg
- pymdownx.inlinehilite
- pymdownx.magiclink
- pymdownx.mark
#- pymdownx.smartsymbols
- pymdownx.superfences:
custom_fences:
- name: mermaid
class: mermaid
format: !!python/name:pymdownx.superfences.fence_code_format
- pymdownx.tasklist:
custom_checkbox: true
- pymdownx.tabbed:
alternate_style: true
- pymdownx.tilde
- pymdownx.snippets:
base_path: docs
check_paths: true
restrict_base_path: false # needed to allow including files from the .github folder
auto_append:
- ../includes/glossary.md
# report broken links, anchors, and nav entries as warnings, so that `mkdocs build --strict` (make build) fails
validation:
nav:
omitted_files: warn
not_found: warn
absolute_links: warn
links:
not_found: warn
anchors: warn
absolute_links: warn
unrecognized_links: warn
hooks:
- hooks/copy_markdown_source.py
- hooks/unreleased_versions.py
plugins:
- search:
separator: '[\s\-\.]'
lang: en
- minify:
minify_html: true
- git-revision-date-localized:
strict: false # log "has no git logs" for uncommitted pages as info, not as a warning
- redirects:
redirect_maps:
'api/basic_json/operator_gtgt.md': api/operator_gtgt.md
'api/basic_json/operator_ltlt.md': api/operator_ltlt.md
'api/basic_json/operator_literal_json.md': api/operator_literal_json.md
'api/basic_json/operator_literal_json_pointer.md': api/operator_literal_json_pointer.md
'api/json_pointer/operator_string.md': api/json_pointer/operator_string_t.md
'home/code_of_conduct.md': community/code_of_conduct.md
- htmlproofer: # see https://github.com/manuzhang/mkdocs-htmlproofer-plugin
enabled: !ENV [ENABLED_HTMLPROOFER, False]
raise_error_after_finish: true # log every broken link, then fail
skip_downloads: true # check headers only (customers.md links large PDFs)
raise_error_excludes: # integer status codes, fnmatch patterns
403: ['*'] # bot protection against the plugin's "Bot <uuid>" user agent
429: ['*'] # rate limiting (hundreds of github.com URLs)
502: ['*']
503: ['*']
504: ['*'] # timeouts are reported as 504
-1: # connection errors
- 'https://repology.org/*' # repology.org is suspended since 2026-09
- 'http://2ak5ape.257.cz/' # customers.md: kept although unreachable
401: ['https://fossies.org/*'] # answers the plugin's user agent with 401, browsers and curl with 200
404:
- 'https://gitlab.b-data.ch/*' # answers the plugin's user agent with 404, browsers with 200
# customers.md: kept although dead
- 'https://www.cisco.com/c/dam/en_us/about/doing_business/open_source/docs/CiscoWebexDeskCamera-23-1622100417.pdf'
- 'https://docs.cyberark.com/Downloads/Legal/Privileged%20Session%20Manager%20for%20SSH%20Third-Party%20Notices.pdf'
500: ['https://marne.io/licenses'] # customers.md: kept although dead
ignore_urls:
- mailto:*
- privacy:
# repology.org refuses requests from GitHub Actions runners, which made
# the privacy plugin abort the whole build when it could not download the
# package badges (the fetch fails, then reading the missing cache entry
# raises FileNotFoundError). Readers' browsers are served normally, so
# leave these badges as external references instead of self-hosting them.
# The same goes for img.shields.io, whose version badges time out from
# time to time (strict mode turns the failed download into an error) and
# would go stale between builds if they were self-hosted anyway.
assets_exclude:
- repology.org/*
- img.shields.io/*
- llmstxt:
markdown_description: >
JSON for Modern C++ is a C++11 header-only library implementing a JSON
value type with an STL-like API, JSON Pointer/Patch, CBOR/MessagePack/
BSON/UBJSON/BJData/BON8 binary format support, and a SAX-style parser interface.
sections:
Home:
- index.md
- home/*.md
Features:
- features/*.md
- features/binary_formats/*.md
- features/element_access/*.md
- features/parsing/*.md
- features/types/*.md
Integration:
- integration/*.md
API Documentation:
- api/*.md
- api/basic_json/*.md
- api/basic_json_document/*.md
- api/basic_json_view/*.md
- api/adl_serializer/*.md
- api/byte_container_with_subtype/*.md
- api/json_pointer/*.md
- api/json_sax/*.md
- api/macros/*.md
Community:
- community/*.md
extra_css:
- css/custom.css
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