std::is_error_code_enum
From cppreference.com
< cpp | error | error code
Defined in header
<system_error>
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template< class T >
struct is_error_code_enum; |
(since C++11) | |
If T
is an error code enumeration, 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_code and std::error_condition automatic conversions.
The following classes of the standard library are an error code enum:
Contents |
Inherited from std::integral_constant
Member constants
value
[static]
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true if T is an error code enum, false otherwise (public static member constant) |
Member functions
operator bool |
converts the object to bool, returns value (public member function) |
operator()
(C++14)
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returns value (public member function) |
Member types
Type | Definition |
value_type
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bool
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type
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std::integral_constant<bool, value> |
[edit] See also
(C++11)
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identifies an enumeration as an std::error_condition (class template) |
(library fundamentals TS)
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variable template alias of std::is_error_code_enum::value (variable template) |