libcxx/include/coroutine

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP_COROUTINE
  11 #define _LIBCPP_COROUTINE
  12
  13 /**
  14     coroutine synopsis
  15
  16 namespace std {
  17 // [coroutine.traits]
  18 template <class R, class... ArgTypes>
  19   struct coroutine_traits;
  20 // [coroutine.handle]
  21 template <class Promise = void>
  22   struct coroutine_handle;
  23 // [coroutine.handle.compare]
  24 constexpr bool operator==(coroutine_handle<> x, coroutine_handle<> y) noexcept;
  25 constexpr strong_ordering operator<=>(coroutine_handle<> x, coroutine_handle<> y) noexcept;
  26 // [coroutine.handle.hash]
  27 template <class T> struct hash;
  28 template <class P> struct hash<coroutine_handle<P>>;
  29 // [coroutine.noop]
  30 struct noop_coroutine_promise;
  31 template<> struct coroutine_handle<noop_coroutine_promise>;
  32 using noop_coroutine_handle = coroutine_handle<noop_coroutine_promise>;
  33 noop_coroutine_handle noop_coroutine() noexcept;
  34 // [coroutine.trivial.awaitables]
  35 struct suspend_never;
  36 struct suspend_always;
  37 } // namespace std
  38
  39  */
  40
  41 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
  42 #  include <__cxx03/coroutine>
  43 #else
  44 #  include <__config>
  45
  46 #  if _LIBCPP_STD_VER >= 20
  47 #    include <__coroutine/coroutine_handle.h>
  48 #    include <__coroutine/coroutine_traits.h>
  49 #    include <__coroutine/noop_coroutine_handle.h>
  50 #    include <__coroutine/trivial_awaitables.h>
  51 #  endif // _LIBCPP_STD_VER >= 20
  52
  53 #  include <version>
  54
  55 // standard-mandated includes
  56
  57 // [coroutine.syn]
  58 #  include <compare>
  59
  60 #  ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
  61 #    pragma GCC system_header
  62 #  endif
  63
  64 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
  65 #    include <cstddef>
  66 #    include <iosfwd>
  67 #    include <limits>
  68 #    include <type_traits>
  69 #  endif
  70 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
  71
  72 #endif // _LIBCPP_COROUTINE