Adds asio library and Storage Module

lib/asio-1.18.0/include/asio/multiple_exceptions.hpp

@@ -0,0 +1,58 @@
+//
+// multiple_exceptions.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2020 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_MULTIPLE_EXCEPTIONS_HPP
+#define ASIO_MULTIPLE_EXCEPTIONS_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 {
+
+#if defined(ASIO_HAS_STD_EXCEPTION_PTR) \
+  || defined(GENERATING_DOCUMENTATION)
+
+/// Exception thrown when there are multiple pending exceptions to rethrow.
+class multiple_exceptions
+  : public std::exception
+{
+public:
+  /// Constructor.
+  ASIO_DECL multiple_exceptions(
+      std::exception_ptr first) ASIO_NOEXCEPT;
+
+  /// Obtain message associated with exception.
+  ASIO_DECL virtual const char* what() const
+    ASIO_NOEXCEPT_OR_NOTHROW;
+
+  /// Obtain a pointer to the first exception.
+  ASIO_DECL std::exception_ptr first_exception() const;
+
+private:
+  std::exception_ptr first_;
+};
+
+#endif // defined(ASIO_HAS_STD_EXCEPTION_PTR)
+       //   || defined(GENERATING_DOCUMENTATION)
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/impl/multiple_exceptions.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // ASIO_MULTIPLE_EXCEPTIONS_HPP