20 General utilities library [utilities]

20.18 Execution policies [execpol]

20.18.2 Header <execution> synopsis [execution.syn]

namespace std { // [execpol.type], execution policy type trait template<class T> struct is_execution_policy; template<class T> inline constexpr bool is_execution_policy_v = is_execution_policy<T>::value; } namespace std::execution { // [execpol.seq], sequenced execution policy class sequenced_policy; // [execpol.par], parallel execution policy class parallel_policy; // [execpol.parunseq], parallel and unsequenced execution policy class parallel_unsequenced_policy; // [execpol.unseq], unsequenced execution policy class unsequenced_policy; // [execpol.objects], execution policy objects inline constexpr sequenced_policy seq{ unspecified }; inline constexpr parallel_policy par{ unspecified }; inline constexpr parallel_unsequenced_policy par_unseq{ unspecified }; inline constexpr unsequenced_policy unseq{ unspecified }; }