Function optional_bool

include/engine/framework/io/json.h:111–114

    return value->as_i64();
}

inline int optional_i32(const Value & object, const std::string & key, int default_value) {
    return static_cast<int>(optional_i64(object, key, default_value));
}

inline float optional_f32(const Value & object, const std::string & key, float default_value) {
    const auto * value = object.find(key);