std::is_execution_policy
Defined in header <execution> | ? | ? |
|---|---|---|
template< class T > struct is_execution_policy; | ? | (since C++17) |
检查是否T是标准或实现定义的执行策略类型。
提供成员常量。value等于true，如果T是std::execution::sequenced_policy，，，std::execution::parallel_policy，，，std::execution::parallel_unsequenced_policy，或者实现定义的执行策略类型。否则，value等于false...
程序添加专门化的行为。std::is_execution_policy
模板参数
T | - | a type to check |
|---|
辅助模板
Defined in header <execution> | ? | ? |
|---|---|---|
template< class T > inline constexpr bool is_execution_policy_v = std::is_execution_policy<T>::value; | ? | (since C++17) |
STD：积分[医]常量
成员常数
value static | true if T is a standard or implementation-defined execution policy type , false otherwise (public static member constant) |
|---|
成员函数
operator bool | converts the object to bool, returns value (public member function) |
|---|---|
operator() (C++14) | returns value (public member function) |
成员类型
Type | Definition |
|---|---|
value_type | bool |
type | std::integral_constant<bool, value> |
另见
sequenced_policyparallel_policyparallel_unsequenced_policy (C++17)(C++17)(C++17) | execution policy types (class) |
|---|---|
seqparpar_unseq (C++17)(C++17)(C++17) | global execution policy objects (constant) |
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