1 files changed, 126 insertions, 0 deletions
diff --git a/lib/asio/detail/is_executor.hpp b/lib/asio/detail/is_executor.hpp
new file mode 100644
index 0000000..4584dd0
--- /dev/null
+++ b/lib/asio/detail/is_executor.hpp
@@ -0,0 +1,126 @@
+//
+// detail/is_executor.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASIO_DETAIL_IS_EXECUTOR_HPP
+#define ASIO_DETAIL_IS_EXECUTOR_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include "asio/detail/type_traits.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+struct executor_memfns_base
+{
+  void context();
+  void on_work_started();
+  void on_work_finished();
+  void dispatch();
+  void post();
+  void defer();
+};
+
+template <typename T>
+struct executor_memfns_derived
+  : T, executor_memfns_base
+{
+};
+
+template <typename T, T>
+struct executor_memfns_check
+{
+};
+
+template <typename>
+char (&context_memfn_helper(...))[2];
+
+template <typename T>
+char context_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::context>*);
+
+template <typename>
+char (&on_work_started_memfn_helper(...))[2];
+
+template <typename T>
+char on_work_started_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::on_work_started>*);
+
+template <typename>
+char (&on_work_finished_memfn_helper(...))[2];
+
+template <typename T>
+char on_work_finished_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::on_work_finished>*);
+
+template <typename>
+char (&dispatch_memfn_helper(...))[2];
+
+template <typename T>
+char dispatch_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::dispatch>*);
+
+template <typename>
+char (&post_memfn_helper(...))[2];
+
+template <typename T>
+char post_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::post>*);
+
+template <typename>
+char (&defer_memfn_helper(...))[2];
+
+template <typename T>
+char defer_memfn_helper(
+    executor_memfns_check<
+      void (executor_memfns_base::*)(),
+      &executor_memfns_derived<T>::defer>*);
+
+template <typename T>
+struct is_executor_class
+  : integral_constant<bool,
+      sizeof(context_memfn_helper<T>(0)) != 1 &&
+      sizeof(on_work_started_memfn_helper<T>(0)) != 1 &&
+      sizeof(on_work_finished_memfn_helper<T>(0)) != 1 &&
+      sizeof(dispatch_memfn_helper<T>(0)) != 1 &&
+      sizeof(post_memfn_helper<T>(0)) != 1 &&
+      sizeof(defer_memfn_helper<T>(0)) != 1>
+{
+};
+
+template <typename T>
+struct is_executor
+  : conditional<is_class<T>::value,
+      is_executor_class<T>,
+      false_type>::type
+{
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_IS_EXECUTOR_HPP