Method SwapWithUndefined

library/cpp/json/writer/json_value.cpp:958–968

    }

    void TJsonValue::SwapWithUndefined(TJsonValue& output) noexcept {
        if (Type == JSON_STRING) {
            static_assert(std::is_nothrow_move_constructible<TString>::value, "noexcept violation! Add some try {} catch (...) logic");
            new (&output.Value.String) TString(std::move(Value.String));
            Value.String.~TString();
        } else {
            std::memcpy(&output.Value, &Value, sizeof(Value));
        }
        output.Type = Type;
        Type = JSON_UNDEFINED;
    }

    void TJsonValue::Swap(TJsonValue& rhs) noexcept {
        TJsonValue tmp(std::move(*this));