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26 lines
677 B
C++
26 lines
677 B
C++
#pragma once
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#include "coro/concepts/awaitable.hpp"
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#include <concepts>
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namespace coro::concepts
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{
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// clang-format off
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template<typename type, typename return_type>
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concept promise = requires(type t)
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{
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{ t.get_return_object() } -> std::convertible_to<std::coroutine_handle<>>;
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{ t.initial_suspend() } -> awaiter;
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{ t.final_suspend() } -> awaiter;
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{ t.yield_value() } -> awaitable;
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}
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&& requires(type t, return_type return_value)
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{
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std::same_as<decltype(t.return_void()), void> ||
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std::same_as<decltype(t.return_value(return_value)), void> ||
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requires { t.yield_value(return_value); };
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};
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// clang-format on
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} // namespace coro::concepts
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