SDL_PropertyType.3type - Man Page

#include <SDL3/SDL_properties.h>

typedef enum SDL_PropertyType
{
    SDL_PROPERTY_TYPE_INVALID,
    SDL_PROPERTY_TYPE_POINTER,
    SDL_PROPERTY_TYPE_STRING,
    SDL_PROPERTY_TYPE_NUMBER,
    SDL_PROPERTY_TYPE_FLOAT,
    SDL_PROPERTY_TYPE_BOOLEAN
} SDL_PropertyType;

This enum is available since SDL 3.2.0.