捕获异常后确定异常类型? [英] Determining exception type after the exception is caught?

问题描述

有没有办法确定异常类型，即使你知道你用 catch all 捕获了异常?

Is there a way to determine the exception type even know you caught the exception with a catch all?

例子:

try
{
   SomeBigFunction();
}
catch(...)
{
   //Determine exception type here
}

推荐答案

你实际上可以在 catch(...) 中确定类型，但它不是很有用:

You can actully determine type inside a catch(...), but it is not very useful:

#include <iostream>
#include <exception>

    class E1 : public std::exception {};
    class E2 : public std::exception {};

    int main() {
        try {
            throw E2();
        }
        catch( ... ) {
            try {
                throw;
            }
            catch( const E1 & e ) {
                std::cout << "E1
";
            }
            catch( const E2 & e ) {
                std::cout << "E2
";
            }
        }
    }

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