json/docs/mkdocs at e0eb3e7490579172d08db9403798be63785b91f6 - json

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Niels Lohmann 3ae4d7c45e Make cross-string-type basic_json conversion explicit without implicit conversions

The converting constructor from another basic_json specialization was
always implicit, so a value with a different string_t (std::wstring, a
string with a custom allocator, ...) silently converted into a temporary,
e.g. when passed to a function taking const nlohmann::json&. Such
conversions do not produce correct values (#3425), and
JSON_USE_IMPLICIT_CONVERSIONS=0 did not catch them.

When JSON_USE_IMPLICIT_CONVERSIONS is 0, the constructor is now explicit
if the string types differ. Specializations sharing a string type (json
and ordered_json, different serializers or object maps) stay implicitly
convertible, so the NLOHMANN_DEFINE_TYPE_* macros keep working with
nested json members. get<BasicJsonType>() constructs explicitly and
works in both modes.

Fixes #2649.

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

2026-09-27 16:32:26 +02:00

docs

Make cross-string-type basic_json conversion explicit without implicit conversions

2026-09-27 16:32:26 +02:00

hooks

📝 make documentation more LLM friendly (#5244 )

2026-07-08 20:18:24 +02:00

includes

Clean up and document project files (#4560 )

2025-01-17 06:53:35 +01:00

scripts

Clean up and document project files (#4560 )