std::system_error::what
Min standard notice:
Returns the explanatory string.
# Declarations
virtual const char* what() const noexcept;
(since C++11)
# Return value
Pointer to a null-terminated string with explanatory information.
Returns the explanatory string.
virtual const char* what() const noexcept;
(since C++11)
Pointer to a null-terminated string with explanatory information.