Initial Commit

include/asio/execution/bad_executor.hpp

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+//
+// execution/bad_executor.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// 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_EXECUTION_BAD_EXECUTOR_HPP
+#define ASIO_EXECUTION_BAD_EXECUTOR_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include <exception>
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace execution {
+
+/// Exception thrown when trying to access an empty polymorphic executor.
+class bad_executor
+  : public std::exception
+{
+public:
+  /// Constructor.
+  ASIO_DECL bad_executor() noexcept;
+
+  /// Obtain message associated with exception.
+  ASIO_DECL virtual const char* what() const noexcept;
+};
+
+} // namespace execution
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/execution/impl/bad_executor.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // ASIO_EXECUTION_BAD_EXECUTOR_HPP