19 Diagnostics library [diagnostics]

19.5 System error support [syserr]

19.5.5 Class error_condition [syserr.errcondition]

19.5.5.2 Constructors [syserr.errcondition.constructors]

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error_condition() noexcept;
1
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Effects: Initializes val_ with 0 and cat_ with &generic_category().
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error_condition(int val, const error_category& cat) noexcept;
2
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Effects: Initializes val_ with val and cat_ with &cat.
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template<class ErrorConditionEnum> error_condition(ErrorConditionEnum e) noexcept;
3
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Constraints: is_error_condition_enum_v<ErrorConditionEnum> is true.
4
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Effects: Equivalent to: error_condition ec = make_error_condition(e); assign(ec.value(), ec.category());