# JSON_HAS_RANGES¶

#define JSON_HAS_RANGES /* value */


This macro indicates whether the standard library has any support for ranges. Implies support for concepts. Possible values are 1 when supported or 0 when unsupported.

## Default definition¶

The default value is detected based on the preprocessor macro __cpp_lib_ranges.

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

## Examples¶

Example

The code below forces the library to enable support for ranges:

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

...


## Version history¶

• Added in version 3.11.0.

Last update: December 19, 2022