Difference between revisions of "cpp/error/error code/is error code enum"
From cppreference.com
< cpp | error | error code
m (Shorten template names. Use {{lc}} where appropriate.) |
m (Use since= and until= params of {{dcl}} template.) |
||
| Line 3: | Line 3: | ||
{{dcl begin}} | {{dcl begin}} | ||
{{dcl header | system_error}} | {{dcl header | system_error}} | ||
| − | {{dcl | | + | {{dcl | since=c++11 | 1= |
template< class T > | template< class T > | ||
struct is_error_code_enum; | struct is_error_code_enum; | ||
Revision as of 15:34, 1 July 2013
| 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> |
