重载std :: exception-what（）无法转换const char *

Question

I am writing my exception class:

class MyExcept: public std::exception
{
public:
    MyExcept(std::string _msg);
    virtual ~MyExcept() throw();
    virtual const char* what() const throw();

private:
    std::string m_errorMsg;
};


MyExcept::MyExcept(std::string _msg)
: m_errorMsg(_msg)
{
}

MyExcept::~MyExcept() throw()
{
}

const char* MyExcept:: what() const throw()
{
    return m_errorMsg.c_str;
}

I compiling with g++ and get the following error for the return line in the function what():

cannot convert 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::c_str, std::allocator >' from type 'const char* (std::__cxx11::basic_string::)() const' to type 'const char*' return m_errorMsg.c_str;

What I am I doing wrong? Thanks

Answer 1

Use return m_errorMsg.c_str(); , and it should work - c_str is a function , not a variable .