1 files changed, 49 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/asio/detail/string_view.hpp b/src/third_party/boost-1.69.0/boost/asio/detail/string_view.hpp
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index 00000000000..f74d730c0b7
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+++ b/src/third_party/boost-1.69.0/boost/asio/detail/string_view.hpp
@@ -0,0 +1,49 @@
+//
+// detail/string_view.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 BOOST_ASIO_DETAIL_STRING_VIEW_HPP
+#define BOOST_ASIO_DETAIL_STRING_VIEW_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_STRING_VIEW)
+
+#if defined(BOOST_ASIO_HAS_STD_STRING_VIEW)
+# include <string_view>
+#elif defined(BOOST_ASIO_HAS_STD_EXPERIMENTAL_STRING_VIEW)
+# include <experimental/string_view>
+#else // defined(BOOST_ASIO_HAS_STD_EXPERIMENTAL_STRING_VIEW)
+# error BOOST_ASIO_HAS_STRING_VIEW is set but no string_view is available
+#endif // defined(BOOST_ASIO_HAS_STD_EXPERIMENTAL_STRING_VIEW)
+
+namespace boost {
+namespace asio {
+
+#if defined(BOOST_ASIO_HAS_STD_STRING_VIEW)
+using std::basic_string_view;
+using std::string_view;
+#elif defined(BOOST_ASIO_HAS_STD_EXPERIMENTAL_STRING_VIEW)
+using std::experimental::basic_string_view;
+using std::experimental::string_view;
+#endif // defined(BOOST_ASIO_HAS_STD_EXPERIMENTAL_STRING_VIEW)
+
+} // namespace asio
+} // namespace boost
+
+# define BOOST_ASIO_STRING_VIEW_PARAM boost::asio::string_view
+#else // defined(BOOST_ASIO_HAS_STRING_VIEW)
+# define BOOST_ASIO_STRING_VIEW_PARAM const std::string&
+#endif // defined(BOOST_ASIO_HAS_STRING_VIEW)
+
+#endif // BOOST_ASIO_DETAIL_STRING_VIEW_HPP