Added thirdparty: boost library

thirdparty/include/boost/cobalt/error.hpp

@@ -0,0 +1,72 @@
+// Copyright (c) 2023 Klemens D. Morgenstern
+//
+// 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 BOOST_COBALT_ERROR_HPP
+#define BOOST_COBALT_ERROR_HPP
+
+#include <boost/cobalt/config.hpp>
+#include <boost/system/error_code.hpp>
+
+namespace boost::cobalt
+{
+
+enum class error
+{
+  moved_from,
+  detached,
+  completed_unexpected,
+  wait_not_ready,
+  already_awaited,
+  allocation_failed
+};
+
+
+struct cobalt_category_t final : system::error_category
+{
+  cobalt_category_t() : system::error_category(0x7d4c7b49d8a4fdull) {}
+
+
+  std::string message( int ev ) const override
+  {
+
+    return message(ev, nullptr, 0u);
+  }
+  char const * message( int ev, char * , std::size_t ) const noexcept override
+  {
+    switch (static_cast<error>(ev))
+    {
+      case error::moved_from:
+        return "moved from";
+      case error::detached:
+        return "detached";
+      case error::completed_unexpected:
+        return "completed unexpected";
+      case error::wait_not_ready:
+        return "wait not ready";
+      case error::already_awaited:
+        return "already awaited";
+      case error::allocation_failed:
+        return "allocation failed";
+      default:
+        return "unknown cobalt error";
+    }
+  }
+
+  const char * name() const BOOST_NOEXCEPT override
+  {
+    return "boost.cobalt";
+  }
+};
+
+BOOST_COBALT_DECL system::error_category & cobalt_category();
+BOOST_COBALT_DECL system::error_code make_error_code(error e);
+
+}
+
+template<> struct boost::system::is_error_code_enum<boost::cobalt::error>
+{
+  static const bool value = true;
+};
+
+#endif //BOOST_COBALT_ERROR_HPP