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JSON_HAS_THREE_WAY_COMPARISON

#define JSON_HAS_THREE_WAY_COMPARISON /* value */

This macro indicates whether the compiler and standard library support 3-way comparison. Possible values are 1 when supported or 0 when unsupported.

Default definition

The default value is detected based on the preprocessor macros __cpp_impl_three_way_comparison and __cpp_lib_three_way_comparison.

When the macro is not defined, the library will define it to its default value.

Examples

Example

The code below forces the library to use 3-way comparison:

#define JSON_HAS_THREE_WAY_COMPARISON 1
#include <nlohmann/json.hpp>

...

Version history

  • Added in version 3.11.0.

Last update: August 12, 2022