std::exception::what
From cppreference.com
virtual const char* what() const throw(); |
(until C++11) | |
virtual const char* what() const noexcept; |
(since C++11) (constexpr since C++26) |
|
Returns the explanatory string.
[edit] Parameters
(none)
[edit] 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.
The returned string is encoded with the ordinary literal encoding during constant evaluation. |
(since C++26) |
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 108 | C++98 | it was unspecified when the returned pointer becomes invalid | specified |