# JSON_HAS_STATIC_RTTI - JSON for Modern C++
Author: Niels Lohmann

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# JSON_HAS_STATIC_RTTI

    #define JSON_HAS_STATIC_RTTI /* value */

This macro indicates whether the standard library has any support for RTTI (run time type information). Possible values are `1` when supported or `0` when unsupported.

## Default definition

The default value is detected based on the preprocessor macro `_HAS_STATIC_RTTI`.

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 libraries with RTTI dependence:

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

    ...

## Version history

- Added in version 3.11.3.

November 12, 2025