Added thirdparty: boost library

thirdparty/include/boost/mysql/detail/string_view_offset.hpp

@@ -0,0 +1,35 @@
+//
+// Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail 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_MYSQL_DETAIL_STRING_VIEW_OFFSET_HPP
+#define BOOST_MYSQL_DETAIL_STRING_VIEW_OFFSET_HPP
+
+#include <cstddef>
+
+namespace boost {
+namespace mysql {
+namespace detail {
+
+// Represents a string_view using offsets into a buffer.
+// Useful during deserialization, for buffers that may reallocate.
+struct string_view_offset
+{
+    std::size_t offset;
+    std::size_t size;
+
+    constexpr bool operator==(string_view_offset rhs) const noexcept
+    {
+        return offset == rhs.offset && size == rhs.size;
+    }
+    constexpr bool operator!=(string_view_offset rhs) const noexcept { return !(*this == rhs); }
+};
+
+}  // namespace detail
+}  // namespace mysql
+}  // namespace boost
+
+#endif