C++ 异常:抛出 std::string

问题描述

当我的 C++ 方法遇到一些奇怪的事情并且无法恢复时，我想抛出一个异常.抛出一个 std::string 指针可以吗?

I would like to throw an exception when my C++ methods encounter something weird and can't recover. Is it OK to throw a std::string pointer?

这是我期待做的事情:

void Foo::Bar() {
    if(!QueryPerformanceTimer(&m_baz)) {
        throw new std::string("it's the end of the world!");
    }
}

void Foo::Caller() {
    try {
        this->Bar(); // should throw
    }
    catch(std::string *caught) { // not quite sure the syntax is OK here...
        std::cout << "Got " << caught << std::endl;
    }
}

推荐答案

是的.std::exception 是C++ 标准库.您可能希望避免使用字符串作为异常类，因为它们本身在使用过程中会抛出异常.如果发生这种情况，那么你会在哪里?

Yes. std::exception is the base exception class in the C++ standard library. You may want to avoid using strings as exception classes because they themselves can throw an exception during use. If that happens, then where will you be?

boost 有一个优秀的文档，关于异常和错误处理的良好风格.值得一读.

boost has an excellent document on good style for exceptions and error handling. It's worth a read.

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