19 Diagnostics library [diagnostics]

19.5 System error support [syserr]

19.5.5 Class error_condition [syserr.errcondition]

19.5.5.3 Modifiers [syserr.errcondition.modifiers]

void assign(int val, const error_category& cat) noexcept;
Postconditions: val_ == val and cat_ == &cat.
template<class ErrorConditionEnum> error_condition& operator=(ErrorConditionEnum e) noexcept;
Effects: Equivalent to: error_condition ec = make_error_condition(e); assign(ec.value(), ec.category();
Returns: *this.
void clear() noexcept;
Postconditions: value() == 0 and category() == generic_category().

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