Added boost header

test/external/boost/xpressive/detail/static/modifier.hpp

@@ -0,0 +1,66 @@
+///////////////////////////////////////////////////////////////////////////////
+// modifier.hpp
+//
+//  Copyright 2008 Eric Niebler. 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_XPRESSIVE_DETAIL_STATIC_MODIFIER_HPP_EAN_10_04_2005
+#define BOOST_XPRESSIVE_DETAIL_STATIC_MODIFIER_HPP_EAN_10_04_2005
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+# pragma warning(push)
+# pragma warning(disable : 4510) // default constructor could not be generated
+# pragma warning(disable : 4610) // user defined constructor required
+#endif
+
+#include <boost/xpressive/detail/detail_fwd.hpp>
+#include <boost/proto/traits.hpp>
+#include <boost/xpressive/regex_constants.hpp>
+
+namespace boost { namespace xpressive { namespace detail
+{
+
+    ///////////////////////////////////////////////////////////////////////////////
+    // modifier
+    template<typename Modifier>
+    struct modifier_op
+    {
+        typedef regex_constants::syntax_option_type opt_type;
+
+        template<typename Expr>
+        struct apply
+        {
+            typedef typename proto::binary_expr<
+                modifier_tag
+              , typename proto::terminal<Modifier>::type
+              , typename proto::result_of::as_child<Expr const>::type
+            >::type type;
+        };
+
+        template<typename Expr>
+        typename apply<Expr>::type const
+        operator ()(Expr const &expr) const
+        {
+            typename apply<Expr>::type that = {{this->mod_}, proto::as_child(expr)};
+            return that;
+        }
+
+        operator opt_type() const
+        {
+            return this->opt_;
+        }
+
+        Modifier mod_;
+        opt_type opt_;
+    };
+
+}}}
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma warning(pop)
+#endif
+
+#endif