Added thirdparty: boost library

thirdparty/include/boost/url/rfc/detail/scheme_rule.hpp

@@ -0,0 +1,55 @@
+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco 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)
+//
+// Official repository: https://github.com/boostorg/url
+//
+
+#ifndef BOOST_URL_RFC_DETAIL_SCHEME_RULE_HPP
+#define BOOST_URL_RFC_DETAIL_SCHEME_RULE_HPP
+
+#include <boost/url/detail/config.hpp>
+#include <boost/url/error_types.hpp>
+#include <boost/url/scheme.hpp>
+#include <boost/core/detail/string_view.hpp>
+
+namespace boost {
+namespace urls {
+namespace detail {
+
+/** Rule for scheme
+
+    @par BNF
+    @code
+    scheme      = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+    @endcode
+
+    @par Specification
+    @li <a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.1"
+        >3.1. Scheme (rfc3986)</a>
+
+    @see
+        @ref scheme.
+*/
+struct scheme_rule
+{
+    struct value_type
+    {
+        core::string_view scheme;
+        urls::scheme scheme_id =
+            urls::scheme::unknown;
+    };
+
+    system::result<value_type>
+    parse(
+        char const*& it,
+        char const* end) const noexcept;
+};
+
+} // detail
+} // urls
+} // boost
+
+#endif