Files
json/docs/mkdocs/mkdocs.yml
T
Niels Lohmann 1419aeff60 Move the user-defined string literals to <nlohmann/json_literals.hpp>
Following the review in #5294, the literals now live in their own header
instead of being removed entirely: <nlohmann/json.hpp> includes it at the
end unless JSON_NO_AUTOMATIC_UDLS (renamed from JSON_NO_UDLS) is defined,
so a project can opt out globally and include the header only where the
literals are used.

The header only uses public and standard macros, because the library's
internal macros are undefined at the end of json.hpp and the amalgamation
inlines macro_scope.hpp only once. For the same reason, the library no
longer defines and undefines JSON_USE_GLOBAL_UDLS, so a user's definition
is still visible to the header. The single-header copy is identical to
the multi-header one, as it only includes <nlohmann/json.hpp>. The module
always exports the literals.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-09-28 21:49:37 +02:00

448 lines
20 KiB
YAML

# 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
- 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/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
- Integration:
- integration/index.md
- integration/migration_guide.md
- integration/cmake.md
- integration/package_managers.md
- integration/pkg-config.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
- '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_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
- 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
- '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_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_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
- '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_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_DIAGNOSTIC_POSITIONS': api/macros/json_diagnostic_positions.md
- 'JSON_DISABLE_ENUM_SERIALIZATION': api/macros/json_disable_enum_serialization.md
- 'JSON_HAS_CPP_11, JSON_HAS_CPP_14, JSON_HAS_CPP_17, JSON_HAS_CPP_20': api/macros/json_has_cpp_11.md
- 'JSON_HAS_EXPERIMENTAL_FILESYSTEM, JSON_HAS_FILESYSTEM': api/macros/json_has_filesystem.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_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_SIMDUTF': api/macros/json_use_simdutf.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.arithmatex
- 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
hooks:
- hooks/copy_markdown_source.py
plugins:
- search:
separator: '[\s\-\.]'
lang: en
- minify:
minify_html: true
- git-revision-date-localized
- 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]
ignore_urls:
- http://nlohmann.github.io/json/*
- https://nlohmann.github.io/json/*
- 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.
assets_exclude:
- repology.org/*
- 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:
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- api/basic_json/*.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:
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extra_javascript:
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