ceph/src/Beast/include/beast/core/handler_concepts.hpp

   1 //
   2 // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot 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
   8 #ifndef BEAST_HANDLER_CONCEPTS_HPP
   9 #define BEAST_HANDLER_CONCEPTS_HPP
  10
  11 #include <beast/config.hpp>
  12 #include <beast/core/detail/is_call_possible.hpp>
  13 #include <type_traits>
  14
  15 namespace beast {
  16
  17 /// Determine if `T` meets the requirements of @b `CompletionHandler`.
  18 template<class T, class Signature>
  19 #if BEAST_DOXYGEN
  20 using is_CompletionHandler = std::integral_constant<bool, ...>;
  21 #else
  22 using is_CompletionHandler = std::integral_constant<bool,
  23     std::is_copy_constructible<typename std::decay<T>::type>::value &&
  24         detail::is_call_possible<T, Signature>::value>;
  25 #endif
  26 } // beast
  27
  28 #endif