std::is_error_condition_enum

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std::error_condition

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error_condition::error_condition
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error_condition::value
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error_condition::operator bool
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is_error_condition_enum
hash<std::error_condition>

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Defined in header`<system_error>`
template<class T> struct is_error_condition_enum;		(since C++11)

IfT is an error condition enum (such asstd::errc), this template provides the member constantvalue equaltrue. For any other type,value isfalse.

This template may be specialized for aprogram-defined type to indicate that the type is eligible forstd::error_condition implicit conversions.

[edit]Helper variable template

template<class T> inlineconstexprbool is_error_condition_enum_v= is_error_condition_enum<T>::value;		(since C++17)

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Inherited fromstd::integral_constant

Member constants

value

[static]

true ifT is an error condition enum,false otherwise
(public static member constant)

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operator bool	converts the object tobool, returnsvalue (public member function)
operator() (C++14)	returnsvalue (public member function)

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Type	Definition
`value_type`	bool
`type`	std::integral_constant<bool, value>

[edit]See also

is_error_code_enum

(C++11)

identifies a class as anerror_code enumeration
(class template)[edit]

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std::is_error_condition_enum

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[edit]Helper variable template

Inherited fromstd::integral_constant

Member constants

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