std::is_error_condition_enum
< cpp | error | error condition
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Defined in header
<system_error> |
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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
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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
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value
[static]
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true if T is an error condition enum, false otherwise(public static member constant) |
Member functions
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operator bool
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converts the object to bool, returns value (public member function) |
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operator()
(C++14)
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returns value (public member function) |
Member types
| Type | Definition |
value_type |
bool |
type |
std::integral_constant<bool, value> |
See also
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(C++11)
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identifies a class as an error_code enumeration (class template) |