std::is_error_code_enum
Defined in header <system_error> |
||
|---|---|---|
|
(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:
Helper variable template
|
(since C++17) |
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) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/error/error_code/is_error_code_enum