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# Macros
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2022-04-09 19:09:23 +03:00
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!!! note
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This page is under construction. See the [macro overview page](../../features/macros.md) until then.
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2021-12-29 15:41:01 +03:00
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Some aspects of the library can be configured by defining preprocessor macros before including the `json.hpp` header.
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2022-04-16 23:33:06 +03:00
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- [**JSON_ASSERT(x)**](json_assert.md) - control behavior of runtime assertions
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- `JSON_CATCH_USER(exception)`
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- [**JSON_DIAGNOSTICS**](json_diagnostics.md) - control extended diagnostics
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- `JSON_HAS_CPP_11`, `JSON_HAS_CPP_14`, `JSON_HAS_CPP_17`, `JSON_HAS_CPP_20`
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- [**JSON_HAS_FILESYSTEM**/**JSON_HAS_EXPERIMENTAL_FILESYSTEM**](json_has_filesystem.md) - control `std::filesystem` support
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- `JSON_NOEXCEPTION`
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- `JSON_NO_IO`
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- [**JSON_SKIP_UNSUPPORTED_COMPILER_CHECK**](json_skip_unsupported_compiler_check.md) - do not warn about unsupported compilers
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2021-12-29 15:41:01 +03:00
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- `JSON_THROW_USER(exception)`
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- `JSON_TRY_USER`
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- `JSON_USE_IMPLICIT_CONVERSIONS`
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- `NLOHMANN_DEFINE_TYPE_INTRUSIVE(type, member...)`
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- `NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE(type, member...)`
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- `NLOHMANN_JSON_SERIALIZE_ENUM(type, ...)`
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- `NLOHMANN_JSON_VERSION_MAJOR`, `NLOHMANN_JSON_VERSION_MINOR`, `NLOHMANN_JSON_VERSION_PATCH`
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