Added thirdparty: boost library

thirdparty/include/boost/spirit/home/x3/directive/matches.hpp

@@ -0,0 +1,51 @@
+/*=============================================================================
+    Copyright (c) 2015 Mario Lang
+    Copyright (c) 2001-2011 Hartmut Kaiser
+
+    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)
+=============================================================================*/
+#if !defined(BOOST_SPIRIT_HOME_X3_EXTENSIONS_MATCHES_HPP)
+#define BOOST_SPIRIT_HOME_X3_EXTENSIONS_MATCHES_HPP
+
+#include <boost/spirit/home/x3/core/parser.hpp>
+#include <boost/spirit/home/x3/support/traits/move_to.hpp>
+#include <boost/spirit/home/x3/support/unused.hpp>
+
+namespace boost { namespace spirit { namespace x3
+{
+    template <typename Subject>
+    struct matches_directive : unary_parser<Subject, matches_directive<Subject>>
+    {
+        using base_type = unary_parser<Subject, matches_directive<Subject>>;
+        static bool const has_attribute = true;
+        using attribute_type = bool;
+
+        constexpr matches_directive(Subject const& subject) : base_type(subject) {}
+
+        template <typename Iterator, typename Context
+          , typename RContext, typename Attribute>
+        bool parse(Iterator& first, Iterator const& last
+          , Context const& context, RContext& rcontext, Attribute& attr) const
+        {
+            bool const result = this->subject.parse(
+                    first, last, context, rcontext, unused);
+            traits::move_to(result, attr);
+            return true;
+        }
+    };
+
+    struct matches_gen
+    {
+        template <typename Subject>
+        constexpr matches_directive<typename extension::as_parser<Subject>::value_type>
+        operator[](Subject const& subject) const
+        {
+            return { as_parser(subject) };
+        }
+    };
+
+    constexpr auto matches = matches_gen{};
+}}}
+
+#endif