* 📡 Fix documentation gaps found in a full GitHub Discussions review
Reviewed all 1008 GitHub Discussions (2020-2026) for recurring questions
that better or more visible documentation would have avoided. Adds/expands
documentation for ~26 distinct gaps, including:
- New "Debugging" page collecting natvis, GDB pretty printer, LLDB status,
and JSON_DIAGNOSTICS pointers (previously scattered/undiscoverable)
- Thread-safety and schema-validation FAQ entries
- StringType's char-based requirement (no wstring/u16string/u32string)
- Brace-initialization-yields-arrays warning directly on the constructor
reference page (previously only in the FAQ, missed by users reading
the constructor docs)
- std::any exclusion from get<T>(), with a manual-dispatch example
- Non-string-keyed std::map serializing as an array of pairs
- ordered_json compatibility with NLOHMANN_DEFINE_TYPE_* macros
(already worked, was undocumented)
- std::array truncation on size-mismatched conversion (no exception)
- static_cast vs. get<std::optional<T>>() divergence
- Recipe for omitting a std::optional field instead of emitting null
- No built-in nesting-depth limit during parsing + a callback-based
workaround recipe
- Recipe for streaming a large homogeneous array via parser callbacks
- operator>> stream-position semantics for concatenated JSON values
- JSON Pointer array-vs-object creation rule for non-existing paths
- CMake target name (nlohmann_json_modules) needed to link C++20 modules
- ESP-IDF/PlatformIO: no official package, link to a community fork
- get(key, default) as the Python dict.get() equivalent
- reserve() recipe for pre-allocating array capacity
- JSONC as an alias for the existing ignore_comments/ignore_trailing_commas
combination (distinct from the unsupported JSON5)
- items() dereferenced-element type: decltype() idiom + detail-namespace
stability caveat
- Various macro/type-conversion limitations (MSGPACK_DEFINE_ARRAY
equivalent, char-array round-tripping, ADL serializer macro gap)
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
* 🚶 fix format
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
---------
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Implement the scoped agent-readiness subset for json.nlohmann.me:
- Add the mkdocs-llmstxt plugin to generate llms.txt from the nav
(full_output/llms-full.txt deliberately omitted to avoid dumping
500+ API reference pages into one giant file).
- Add a permissive robots.txt with a Sitemap reference.
- Add a build hook (hooks/copy_markdown_source.py) that copies each
page's Markdown source into the built site as a `<path>.md` sibling
of its HTML output, so agents/tools can fetch raw Markdown directly.
sitemap.xml was already emitted by default and needed no change.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
* Added NLOHNMANN_JSON_SERIALIZE_ENUM_STRICT
- duplicate of NLOHMANN_JSON_SERIALIZE_ENUM
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* Added failing tests for NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* modified NLOHMANN_JSON_SERIALIZE_STRICT to throw
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* added documentation and changed readme to include NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* ran amalgamate
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* docs(macros): add page for JSON_SERIALIZE_ENUM_STRICT
- added page to nav
- added links to new page where appropriate
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* refactor(macros): make JSON_SERIALIZE_ENUM_STRICT use JSON_THROW
- added templated wrapper function to fix scope error in calling JSON_THROW
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* refactor(macros): make NLOHMANN_SERIALIZE_ENUM_STRICT use error code 410
- added error code 410 to docs
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* tests(macros): add test for to_json with enum value not mentioned
in mapping for NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* Apply suggestions from code review
Co-authored-by: Niels Lohmann <niels.lohmann@gmail.com>
Signed-off-by: Caillin Nugent <nugentcaillin@gmail.com>
* fix(macro): prevent compilation error with -Werror and -Wunused-parameter
with NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
- casted exception to void to avoid warning
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* fix(docs): add link to NLOHMANN_SERIALIZE_ENUM_STRICT docs to exception page
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* docs(macros): add example of exception throwing for NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
* refactor(macros): add more in-depth error message to NLOHMANN_JSON_SERIALIZE_ENUM_STRICT
- changed error message to follow style of nlohmann/json#4989
- made description of throw wrapper more general
- updated tests and example of exceptions
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
---------
Signed-off-by: Caillin Nugent <caillinn@student.unimelb.edu.au>
Signed-off-by: Caillin Nugent <nugentcaillin@gmail.com>
Co-authored-by: Niels Lohmann <niels.lohmann@gmail.com>
* Add new macros for named conversions
* Unit tests for the named conversion macros
* Update the docs to include the new macros
* Fix the documentation for the macros
the correct maximum number of member variables is 63
* Fix CI tests
* update the named macros
* move the example files
* update the explicit macros expansion
* update documentation
* fix documentation hiccups
* astyle changes
* add static analysis exceptions
* change md header to explicit html to fit the length
* Small corrections to docs
Co-authored-by: Niels Lohmann <niels.lohmann@gmail.com>
Signed-off-by: George Sedov <radist.morse@gmail.com>
---------
Signed-off-by: George Sedov <radist.morse@gmail.com>
Co-authored-by: Niels Lohmann <niels.lohmann@gmail.com>
* Move UDLs into nlohmann::literals::json_literals namespace
* Add 'using namespace' to unit tests
* Add 'using namespace' to examples
* Add 'using namespace' to README
* Move UDL mkdocs pages out of basic_json/
* Update documentation
* Update docset index
* Add JSON_GlobalUDLs CMake option
* Add unit test
* Build examples without global UDLs
* Add CI target
* Add versioned inline namespace
Add a versioned inline namespace to prevent ABI issues when linking code
using multiple library versions.
* Add namespace macros
* Encode ABI information in inline namespace
Add _diag suffix to inline namespace if JSON_DIAGNOSTICS is enabled, and
_ldvcmp suffix if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON is enabled.
* Move ABI-affecting macros into abi_macros.hpp
* Move std_fs namespace definition into std_fs.hpp
* Remove std_fs namespace from unit test
* Format more files in tests directory
* Add unit tests
* Update documentation
* Fix GDB pretty printer
* fixup! Add namespace macros
* Derive ABI prefix from NLOHMANN_JSON_VERSION_*
* Add operator<< for json_pointer
* Deprecate json_pointer::operator string_t()
* Update documentation
* Move operator<<(basic_json) example
* Add example
* Add mkdocs-redirects
* Move operator<< and operator>> doc pages out of basic_json/
* Rename JSON pointer operator_string to operator_string_t
* Add unit test
* Add C++20 3-way comparison operator and fix broken comparisons
Fixes#3207.
Fixes#3409.
* Fix iterators to meet (more) std::ranges requirements
Fixes#3130.
Related discussion: #3408
* Add note about CMake standard version selection to unit tests
Document how CMake chooses which C++ standard version to use when
building tests.
* Update documentation
* CI: add legacy discarded value comparison
* Fix internal linkage errors when building a module
Niels Lohmann
Caillin Nugent
George Sedov
trdesilva
DmitriBogdanov
Miko
chirsz
Nikhil
Einars Netlis-Galejs
Florian Albrechtskirchinger
Raphael Grimm
Richard Hozák