immediate_awaitable.hpp

#ifndef MRS_LIB_CORO_INTERNAL_IMMEDIATE_AWAITABLE_HPP_
#define MRS_LIB_CORO_INTERNAL_IMMEDIATE_AWAITABLE_HPP_
 
 
#include <utility>
 
 
namespace mrs_lib::coro::internal
{

  template <typename Awaiter>
  class [[nodiscard("The result must be awaited, otherwise, it may do NOTHING!!!")]] ImmediateAwaitable
  {
 
  public:
    ImmediateAwaitable()
      requires std::default_initializable<Awaiter>
    = default;
    ImmediateAwaitable(Awaiter awaiter) : awaiter_(std::move(awaiter))
    {
    }
 
    ~ImmediateAwaitable() = default;
 
    ImmediateAwaitable(const ImmediateAwaitable&) = delete;
    ImmediateAwaitable(ImmediateAwaitable&&) = delete;
    ImmediateAwaitable& operator=(const ImmediateAwaitable&) = delete;
    ImmediateAwaitable& operator=(ImmediateAwaitable&&) = delete;
 
    friend Awaiter operator co_await(ImmediateAwaitable awaitable)
    {
      return std::move(awaitable).awaiter_;
    }
 
  private:
    Awaiter awaiter_{};
  };
 
} // namespace mrs_lib::coro::internal
 
 
#endif // MRS_LIB_CORO_INTERNAL_IMMEDIATE_AWAITABLE_HPP_