[Boost-commit] svn:boost r70690 - trunk/boost/range/algorithm

Subject: [Boost-commit] svn:boost r70690 - trunk/boost/range/algorithm
From: neil_at_[hidden]
Date: 2011-03-29 06:27:02

Author: neilgroves
Date: 2011-03-29 06:27:00 EDT (Tue, 29 Mar 2011)
New Revision: 70690
URL: http://svn.boost.org/trac/boost/changeset/70690

Log:
[boost][range] - Improve the forwarding of the functor, and provide a work-around for the breaking changes in VC10 for_each.
Text files modified: 
   trunk/boost/range/algorithm/for_each.hpp |    67 ++++++++++++++++++++++++++++++++++++++- 
   1 files changed, 64 insertions(+), 3 deletions(-)

Modified: trunk/boost/range/algorithm/for_each.hpp
==============================================================================
--- trunk/boost/range/algorithm/for_each.hpp	(original)
+++ trunk/boost/range/algorithm/for_each.hpp	2011-03-29 06:27:00 EDT (Tue, 29 Mar 2011)
@@ -13,13 +13,52 @@
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
 #include <boost/range/concepts.hpp>
+#include <boost/ref.hpp>
 #include <algorithm>
 
+#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
+#include <xutility>
+#endif
+
 namespace boost
 {
     namespace range
     {
 
+#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
+        namespace for_each_detail
+        {
+            template<typename Iterator, typename UnaryFunction>
+            inline UnaryFunction
+            for_each_impl(Iterator first, Iterator last, UnaryFunction fun,
+                          typename enable_if<
+                            is_reference_wrapper<UnaryFunction>,
+                            void
+                          >::type* = 0)
+            {
+                    typedef typename std::_Get_unchecked_type<Iterator>::type
+                                unchecked_iterator;
+
+                    unchecked_iterator unchecked_last = std::_Unchecked(last);
+                    for (unchecked_iterator unchecked_first = std::_Unchecked(first); first != last; ++first)
+                            fun.get()(*unchecked_first);
+
+                    return fun;
+            }
+
+            template<typename Iterator, typename UnaryFunction>
+            inline UnaryFunction
+            for_each_impl(Iterator first, Iterator last, UnaryFunction fn,
+                          typename disable_if<
+                            is_reference_wrapper<UnaryFunction>,
+                            void
+                          >::type* = 0)
+            {
+                return std::for_each(first, last, fn);
+            }
+        }
+#endif
+
 /// \brief template function for_each
 ///
 /// range-based version of the for_each std algorithm
@@ -30,7 +69,18 @@
 inline UnaryFunction for_each(SinglePassRange & rng, UnaryFunction fun)
 {
     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> ));
-    return std::for_each(boost::begin(rng),boost::end(rng),fun);
+    
+#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
+        return for_each_detail::for_each_impl<
+                typename range_iterator<SinglePassRange>::type,
+                UnaryFunction
+        >(boost::begin(rng), boost::end(rng), fun);
+#else
+    return std::for_each<
+        BOOST_DEDUCED_TYPENAME range_iterator<SinglePassRange>::type,
+        UnaryFunction
+    >(boost::begin(rng),boost::end(rng),fun);
+#endif    
 }
 
 /// \overload
@@ -38,11 +88,22 @@
 inline UnaryFunction for_each(const SinglePassRange& rng, UnaryFunction fun)
 {
     BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> ));
-    return std::for_each(boost::begin(rng), boost::end(rng), fun);
+    
+#if BOOST_WORKAROUND(BOOST_MSVC, == 1600)
+        return for_each_detail::for_each_impl<
+                typename range_iterator<const SinglePassRange>::type,
+                UnaryFunction
+        >(boost::begin(rng), boost::end(rng), fun);
+#else    
+    return std::for_each<
+        BOOST_DEDUCED_TYPENAME range_iterator<const SinglePassRange>::type,
+        UnaryFunction
+    >(boost::begin(rng), boost::end(rng), fun);
+#endif    
 }
 
     } // namespace range
     using range::for_each;
 } // namespace boost
 
-#endif // include guard
+#endif // include guard
\ No newline at end of file