Method IsUInteger

library/cpp/json/writer/json_value.cpp:778–789

    }

    bool TJsonValue::IsUInteger() const noexcept {
        switch (Type) {
            case JSON_UINTEGER:
                return true;
            case JSON_INTEGER:
                return (Value.Integer >= 0);
            case JSON_DOUBLE:
                return ((unsigned long long)Value.Double == Value.Double);
            default:
                return false;
        }
    }

    bool TJsonValue::IsDouble() const noexcept {
        // Check whether we can convert integer to floating-point