completion_signatures.hpp

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#ifndef KOKKOS_EXECUTION_IMPL_COMPLETION_SIGNATURES_HPP
#define KOKKOS_EXECUTION_IMPL_COMPLETION_SIGNATURES_HPP
 
#include "kokkos-execution/stdexec.hpp"
 
namespace Kokkos::Execution::Impl {

template <stdexec::sender Sndr, stdexec::__valid_completion_signatures ExtraSigs, typename... Env>
consteval auto completion_signatures_add() {
    using completions_t = stdexec::__completion_signatures_of_t<Sndr, Env...>;
 
    if constexpr (stdexec::__sends<stdexec::set_value_t, Sndr, Env...>) {
        return stdexec::__concat_completion_signatures(completions_t{}, ExtraSigs{});
    } else {
        return completions_t{};
    }
}
 
template <stdexec::sender Sndr, stdexec::__valid_completion_signatures ExtraSigs, typename... Env>
using completion_signatures_add_t = decltype(completion_signatures_add<Sndr, ExtraSigs, Env...>());
 
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define KOKKOS_EXECUTION_COMPL_SIGS_ADD(_decayed_self_type_, _sndr_type_, ...)                                         \
    template <stdexec::__decays_to<_decayed_self_type_> Self, typename... Env>                                         \
    static consteval auto get_completion_signatures() {                                                                \
        return Kokkos::Execution::Impl::completion_signatures_add<                                                     \
            stdexec::__copy_cvref_t<Self, _sndr_type_>,                                                                \
            stdexec::completion_signatures<__VA_ARGS__>,                                                               \
            Env...                                                                                                     \
        >();                                                                                                           \
    }
 
// NOLINTNEXTLINE(cppcoreguidelines-macro-usage)
#define KOKKOS_EXECUTION_COMPL_SIGS_KEEP(_decayed_self_type_, _sndr_type_)                                             \
    template <stdexec::__decays_to<_decayed_self_type_> Self, typename... Env>                                         \
    static consteval auto get_completion_signatures() {                                                                \
        return stdexec::__completion_signatures_of_t<stdexec::__copy_cvref_t<Self, _sndr_type_>, Env...>{};            \
    }
 
} // namespace Kokkos::Execution::Impl
 
#endif // KOKKOS_EXECUTION_IMPL_COMPLETION_SIGNATURES_HPP