comparison DEPENDENCIES/generic/include/boost/proto/functional/range/begin.hpp @ 16:2665513ce2d3

Add boost headers

+///////////////////////////////////////////////////////////////////////////////
+/// \file begin.hpp
+/// Proto callables for boost::begin()
+//
+//  Copyright 2012 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_PROTO_FUNCTIONAL_RANGE_BEGIN_HPP_EAN_27_08_2012
+#define BOOST_PROTO_FUNCTIONAL_RANGE_BEGIN_HPP_EAN_27_08_2012
+
+#include <boost/range/begin.hpp>
+#include <boost/proto/proto_fwd.hpp>
+
+namespace boost { namespace proto { namespace functional
+{
+
+    // A PolymorphicFunctionObject that wraps boost::begin()
+    struct begin
+    {
+        BOOST_PROTO_CALLABLE()
+
+        template<typename Sig>
+        struct result;
+
+        template<typename This, typename Rng>
+        struct result<This(Rng)>
+          : boost::range_iterator<Rng const>
+        {};
+
+        template<typename This, typename Rng>
+        struct result<This(Rng &)>
+          : boost::range_iterator<Rng>
+        {};
+
+        template<typename Rng>
+        typename boost::range_iterator<Rng>::type operator()(Rng &rng) const
+        {
+            return boost::begin(rng);
+        }
+
+        template<typename Rng>
+        typename boost::range_iterator<Rng const>::type operator()(Rng const &rng) const
+        {
+            return boost::begin(rng);
+        }
+    };
+
+}}}
+
+#endif