std::exception::what

Returns the explanatory string.

# Declarations

virtual const char* what() const throw();

(until C++11)

virtual const char* what() const noexcept;

(since C++11) (constexpr since C++26)

# Return value

Pointer to a null-terminated string with explanatory information. The pointer is guaranteed to be valid at least until the exception object from which it is obtained is destroyed, or until a non-const member function on the exception object is called.

# Defect reports