detail/await_suspend_helper.hpp
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detail/await_suspend_helper.hpp
| Line | Hits | Source Code |
|---|---|---|
| 1 | // | |
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) | |
| 3 | // | |
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | // | |
| 7 | // Official repository: https://github.com/cppalliance/capy | |
| 8 | // | |
| 9 | ||
| 10 | #ifndef BOOST_CAPY_DETAIL_AWAIT_SUSPEND_HELPER_HPP | |
| 11 | #define BOOST_CAPY_DETAIL_AWAIT_SUSPEND_HELPER_HPP | |
| 12 | ||
| 13 | #include <coroutine> | |
| 14 | #include <boost/capy/ex/io_env.hpp> | |
| 15 | ||
| 16 | #include <type_traits> | |
| 17 | ||
| 18 | namespace boost { | |
| 19 | namespace capy { | |
| 20 | namespace detail { | |
| 21 | ||
| 22 | // Helper to normalize await_suspend return types to std::coroutine_handle<> | |
| 23 | template<typename Awaitable> | |
| 24 | 7 | std::coroutine_handle<> call_await_suspend( |
| 25 | Awaitable* a, | |
| 26 | std::coroutine_handle<> h, | |
| 27 | io_env const* env) | |
| 28 | { | |
| 29 | using R = decltype(a->await_suspend(h, env)); | |
| 30 | if constexpr (std::is_void_v<R>) | |
| 31 | { | |
| 32 | ✗ | a->await_suspend(h, env); |
| 33 | ✗ | return std::noop_coroutine(); |
| 34 | } | |
| 35 | else if constexpr (std::is_same_v<R, bool>) | |
| 36 | { | |
| 37 | if(a->await_suspend(h, env)) | |
| 38 | return std::noop_coroutine(); | |
| 39 | return h; | |
| 40 | } | |
| 41 | else | |
| 42 | { | |
| 43 | 7 | return a->await_suspend(h, env); |
| 44 | } | |
| 45 | } | |
| 46 | ||
| 47 | } // namespace detail | |
| 48 | } // namespace capy | |
| 49 | } // namespace boost | |
| 50 | ||
| 51 | #endif | |
| 52 |