std:: is_error_condition_enum
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Member functions | ||||
Non-member functions | ||||
(until C++20)
(until C++20)
(C++20)
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Helper classes | ||||
is_error_condition_enum
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Defined in header
<system_error>
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template
<
class
T
>
struct is_error_condition_enum ; |
(since C++11) | |
If
T
is an error condition enum (such as
std::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_condition implicit conversions.
Helper variable template
template
<
class
T
>
inline
constexpr
bool
is_error_condition_enum_v
=
|
(since C++17) | |
Inherited from std:: integral_constant
Member constants
value
[static]
|
true
if
T
is an error condition 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 a class as an
error_code
enumeration
(class template) |