std::is_error_code_enum - cppreference.com (original) (raw)
| | | | | -------------------------------------------------- | | ------------- | | template< class T > struct is_error_code_enum; | | (since C++11) |
If T is an error code enumeration (such as std::io_errc and std::future_errc), this template provides the member constant value equal true. For any other type, value is false.
This template may be specialized for a program-defined type to indicate that the type is eligible for std::error_code implicit conversion.
Contents
[edit] Helper variable template
| template< class T > constexpr bool is_error_code_enum_v = is_error_code_enum<T>::value; | | (since C++17) | | ------------------------------------------------------------------------------------------------- | | ------------- |
Inherited from std::integral_constant
Member constants
| | true if T is an error code enum, false otherwise (public static member constant) | | ----------------------------------------------------------------------------------- |
Member functions
| | converts the object to bool, returns value (public member function) | | ---------------------------------------------------------------------- | | | returns value (public member function) |