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@@ -62,6 +62,18 @@ When defined, default parse and serialize functions for enums are excluded and h
See [full documentation of `JSON_DISABLE_ENUM_SERIALIZATION`](https://json.nlohmann.me/api/macros/json_disable_enum_serialization/index.md).
## `JSON_DISABLE_TUPLE_REFERENCE_CONVERSION`
When defined to `1`, a JSON value can no longer be created from a one-element `std::tuple` holding a reference to a JSON value, such as the result of `std::forward_as_tuple(j)`. This lets `std::tuple` convert such tuples element-wise.
See [full documentation of `JSON_DISABLE_TUPLE_REFERENCE_CONVERSION`](https://json.nlohmann.me/api/macros/json_disable_tuple_reference_conversion/index.md).
## `JSON_NO_AUTOMATIC_UDLS`
When defined, `<nlohmann/json.hpp>` does not include `<nlohmann/json_literals.hpp>` with the user-defined string literals `operator""_json` and `operator""_json_pointer`. This reduces the compile time of translation units that do not use them, because the literals instantiate the parser in every translation unit that includes them. Include `<nlohmann/json_literals.hpp>` where the literals are needed.
See [full documentation of `JSON_NO_AUTOMATIC_UDLS`](https://json.nlohmann.me/api/macros/json_no_automatic_udls/index.md).
## `JSON_NO_IO`
When defined, headers `<cstdio>`, `<ios>`, `<iosfwd>`, `<istream>`, and `<ostream>` are not included and parse functions relying on these headers are excluded. This is relevant for environment where these I/O functions are disallowed for security reasons (e.g., Intel Software Guard Extensions (SGX)).