[syserr.errcondition.observers] (original) (raw)

19 Diagnostics library [diagnostics]

19.5 System error support [syserr]

19.5.5 Class error_condition [syserr.errcondition]

19.5.5.4 Observers [syserr.errcondition.observers]

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int value() const noexcept;

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Returns: val_.

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const error_category& category() const noexcept;

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Returns: *cat_.

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string message() const;

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

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explicit operator bool() const noexcept;

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Returns: value() != 0.