added asio

include/asio/impl/executor.ipp

@@ -0,0 +1,43 @@
+//
+// impl/executor.ipp
+// ~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2025 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_IMPL_EXECUTOR_IPP
+#define ASIO_IMPL_EXECUTOR_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#if !defined(ASIO_NO_TS_EXECUTORS)
+
+#include "asio/executor.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+bad_executor::bad_executor() noexcept
+{
+}
+
+const char* bad_executor::what() const noexcept
+{
+  return "bad executor";
+}
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // !defined(ASIO_NO_TS_EXECUTORS)
+
+#endif // ASIO_IMPL_EXECUTOR_IPP