comparison DEPENDENCIES/generic/include/boost/spirit/home/karma/reference.hpp @ 16:2665513ce2d3

Add boost headers

+//  Copyright (c) 2001-2011 Joel de Guzman
+//  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_KARMA_REFERENCE_APR_17_2009_1057PM)
+#define BOOST_SPIRIT_KARMA_REFERENCE_APR_17_2009_1057PM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/karma/meta_compiler.hpp>
+#include <boost/spirit/home/karma/generator.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/handles_container.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#include <boost/ref.hpp>
+
+namespace boost { namespace spirit { namespace karma
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // reference is a generator that references another generator (its Subject)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject>
+    struct reference : generator<reference<Subject> >
+    {
+        typedef mpl::int_<generator_properties::all_properties> properties;
+
+        typedef Subject subject_type;
+
+        reference(Subject& subject)
+          : ref(subject) {}
+
+        template <typename Context, typename Unused>
+        struct attribute : Subject::template attribute<Context, Unused> {};
+
+        // Default overload, used whenever the attribute is not unused and not
+        // used from an aliased rule.
+        template <typename OutputIterator, typename Context
+          , typename Delimiter, typename Attribute>
+        bool generate(OutputIterator& sink, Context& context
+          , Delimiter const& delim, Attribute const& attr) const
+        {
+            return ref.get().generate(sink, context, delim, attr);
+        }
+
+        // This overload gets called from an aliased rule only, we take the 
+        // attribute from the context provided from the wrapper rule.
+        template <typename OutputIterator, typename Context
+          , typename Delimiter>
+        bool generate(OutputIterator& sink, Context& context
+          , Delimiter const& delim, unused_type) const
+        {
+            return ref.get().generate(sink, context, delim, context.attributes);
+        }
+
+        // This overload is used whenever no attribute is given and it is used
+        // not from an aliased rule.
+        template <typename OutputIterator, typename Delimiter>
+        bool generate(OutputIterator& sink, unused_type
+          , Delimiter const& delim, unused_type) const
+        {
+            return ref.get().generate(sink, unused, delim, unused);
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            // the reference is transparent (does not add any info)
+            return ref.get().what(context);
+        }
+
+        boost::reference_wrapper<Subject> ref;
+    };
+}}}
+
+namespace boost { namespace spirit { namespace traits
+{
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Attribute, typename Context
+      , typename Iterator>
+    struct handles_container<karma::reference<Subject>, Attribute
+      , Context, Iterator>
+      : handles_container<typename remove_const<Subject>::type, Attribute
+        , Context, Iterator> 
+    {};
+}}}
+
+#endif