22 Diagnostics library [diagnostics]

22.5 System error support [syserr]

22.5.4 Class error_­condition [syserr.errcondition]

22.5.4.4 Class error_­condition observers [syserr.errcondition.observers]

int value() const noexcept;

1
#

Returns: val_­.

const error_category& category() const noexcept;

2
#

Returns: *cat_­.

string message() const;

3
#

Returns: category().message(value()).

explicit operator bool() const noexcept;

4
#

Returns: value() != 0.