std:: is_execution_policy
|
Defined in header
<execution>
|
||
|
template
<
class
T
>
struct is_execution_policy ; |
(since C++17) | |
Checks whether
T
is a standard or implementation-defined execution policy type.
Provides the member constant
value
which is equal to
true
, if
T
is
a standard execution policy type
, or an implementation-defined execution policy type. Otherwise,
value
is equal to
false
.
If the program adds specializations for
std::is_execution_policy
or
std::is_execution_policy_v
, the behavior is undefined.
Template parameters
| T | - | a type to check |
Helper template
|
Defined in header
<execution>
|
||
|
template
<
class
T
>
constexpr bool is_execution_policy_v = std :: is_execution_policy < T > :: value ; |
(since C++17) | |
Inherited from std:: integral_constant
Member constants
|
value
[static]
|
true
if
T
is a standard or implementation-defined execution policy type,
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 > |
#include <execution> static_assert(std::is_execution_policy_v<std::execution::unsequenced_policy>); static_assert(!std::is_execution_policy_v<int>); int main() {}
See also
|
(C++17)
(C++17)
(C++17)
(C++20)
|
execution policy types
(class) |
|
(C++17)
(C++17)
(C++17)
(C++20)
|
global execution policy objects
(constant) |