c++ - 嵌套异常和原始类型

Question

当我捕获的异常是原始类型时，我可以使用 std::throw_with_nested 吗？

据说，新类型是从捕获的异常和新的异常中派生出来的。但我无法从 int 等原始类型派生。因此我不能对原始类型使用嵌套异常。是真的吗？

Answer 1

我的标准拷贝是这样说的:

18.8.6/7 Throws: if U is a non-union class type not derived from nested_exception, an exception of unspecified type that is publicly derived from both U and nested_exception and constructed from std::forward<T>(t), otherwise std::forward<T>(t).

所以 throw_with_nested(42)应该throw 42;