std::is_execution_policy
From cppreference.com
C++
Algorithm library
Defined in header <execution>
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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>
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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
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bool |
type
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std::integral_constant < bool, value> |
Run this code
#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
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(C++17)
(C++17)
(C++17)
(C++20)
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execution policy types (class) |
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(C++17)
(C++17)
(C++17)
(C++20)
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global execution policy objects (constant) |