Difference between revisions of "cpp/error/error code/is error code enum"
From cppreference.com
< cpp | error | error code
m (Use since= and until= params of {{dcl}} template.) |
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* {{lc|std::future_errc}}. | * {{lc|std::future_errc}}. | ||
| − | {{cpp/types/integral_constant/inherit | {{tt|T}} is an error code enum}} | + | {{cpp/types/integral_constant/inherit | {{tt|T}} is an error code enum}} |
| + | |||
| + | ===See also=== | ||
| + | {{dsc begin}} | ||
| + | {{dsc inc | cpp/error/error_condition/dsc is_error_condition_enum}} | ||
| + | {{dsc end}} | ||
Revision as of 06:32, 9 March 2015
| Defined in header <system_error>
|
||
| 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] |
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) |
returns value (public member function) |
Member types
| Type | Definition |
value_type
|
bool |
type
|
std::integral_constant<bool, value> |
See also
| (C++11) |
identifies an enumeration as an std::error_condition (class template) |
