[Boost-commit] svn:boost r67120 - trunk/boost/spirit/home/support/utree

Subject: [Boost-commit] svn:boost r67120 - trunk/boost/spirit/home/support/utree
From: hartmut.kaiser_at_[hidden]
Date: 2010-12-08 22:18:29

Author: hkaiser
Date: 2010-12-08 22:18:28 EST (Wed, 08 Dec 2010)
New Revision: 67120
URL: http://svn.boost.org/trac/boost/changeset/67120

Log:
Spirit: adding missing specializations of customization points for utree
Text files modified: 
   trunk/boost/spirit/home/support/utree/utree_traits.hpp |    32 +++++++++++++++++++++++++++-----        
   1 files changed, 27 insertions(+), 5 deletions(-)

Modified: trunk/boost/spirit/home/support/utree/utree_traits.hpp
==============================================================================
--- trunk/boost/spirit/home/support/utree/utree_traits.hpp	(original)
+++ trunk/boost/spirit/home/support/utree/utree_traits.hpp	2010-12-08 22:18:28 EST (Wed, 08 Dec 2010)
@@ -1,6 +1,7 @@
 /*=============================================================================
     Copyright (c) 2001-2010 Joel de Guzman
     Copyright (c) 2001-2010 Hartmut Kaiser
+    Copyright (c) 2010 Bryce Lelbach
 
     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)
@@ -54,7 +55,8 @@
     }
 
     template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
-    struct assign_to_attribute_from_value<utree, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
+    struct assign_to_attribute_from_value<
+        utree, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
     {
         static void
         call(variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& val, utree& attr)
@@ -94,8 +96,7 @@
     template <>
     struct assign_to_attribute_from_value<utree, utree>
     {
-        static void
-        call(utree const& val, utree& attr)
+        static void call(utree const& val, utree& attr)
         {
             attr = val;
         }
@@ -115,6 +116,26 @@
     };
 
     ///////////////////////////////////////////////////////////////////////////
+    // this specialization keeps symbols from being transformed into strings  
+    template<>
+    struct assign_to_attribute_from_value<utree, utf8_symbol> 
+    {
+        static void call (utf8_symbol const& val, utree& attr) 
+        {
+            attr = val;
+        }
+    };
+
+    template<>
+    struct assign_to_attribute_from_value<utree, utf8_symbol_range> 
+    {
+        static void call (utf8_symbol_range const& val, utree& attr) 
+        {
+            attr = val;
+        }
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
     // push_back support for utree allows concatenation of strings
     // (utree strings are immutable)
     template <typename T>
@@ -450,6 +471,7 @@
         }
     };
 
+    ///////////////////////////////////////////////////////////////////////////
     template <>
     struct extract_from_attribute<utree, utf8_symbol>
     {
@@ -535,7 +557,6 @@
         }
     };
 
-    ///////////////////////////////////////////////////////////////////////////
     // this specialization is used whenever a utree is passed to a rule as part
     // of a sequence
     template <typename Iterator>
@@ -546,7 +567,8 @@
 
         static type pre(iterator_range<Iterator> const& t)
         {
-          return utree(boost::ref(t.front()));   // return utree the begin iterator points to
+            // return utree the begin iterator points to
+            return utree(boost::ref(t.front()));
         }
     };