std::is_error_condition_enum

 

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std::error_condition

Member functions

error_condition::error_condition

error_condition::operator=

error_condition::assign

error_condition::clear

error_condition::value

error_condition::category

error_condition::message

error_condition::operator bool

Non-member functions

operator==operator!=operator<

Helper classes

is_error_condition_enum

hash<std::error_condition>

 

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

If T is an error condition enum, this template provides the member constant value equal true. For any other type, value is false.

This template may be specialized for a user-defined type to indicate that the type is eligible for std::error_condition automatic conversions.

The following class of the standard library is an error condition enum: std::errc.

Helper variable template

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

Inherited from std::integral_constant

Member constants

value [static]

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

Member functions

operator bool	converts the object to bool, returns value (public member function)
operator() (C++14)	returns value (public member function)

Member types

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

See also

is_error_code_enum (C++11)

identifies a class as an error_code enumeration (class template)