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Subject: [Boost-commit] svn:boost r59925 - in branches/release: . boost boost/algorithm/string boost/archive boost/bimap boost/config boost/detail boost/filesystem boost/fusion boost/graph boost/integer boost/interprocess boost/intrusive boost/iostreams boost/math boost/numeric/ublas boost/program_options boost/property_tree boost/proto boost/proto/transform boost/python boost/regex boost/serialization boost/signals boost/signals2 boost/spirit boost/spirit/home boost/spirit/home/karma boost/spirit/home/support boost/statechart boost/system boost/thread boost/tr1 boost/type_traits boost/utility boost/uuid boost/variant boost/wave doc libs libs/array/doc libs/bimap libs/config libs/filesystem libs/fusion libs/graph_parallel libs/integer libs/interprocess libs/intrusive libs/iostreams libs/math libs/mpl/doc/refmanual libs/mpl/doc/src/refmanual libs/numeric/ublas libs/numeric/ublas/doc libs/program_options libs/property_tree libs/python libs/regex libs/regex/doc libs/serialization libs/signals libs/signals2 libs/spirit libs/spirit/classic/example libs/spirit/doc libs/spirit/example libs/spirit/phoenix libs/spirit/test libs/spirit/test/qi libs/statechart libs/static_assert libs/system libs/thread libs/thread/doc libs/timer libs/tr1 libs/type_traits libs/utility libs/uuid libs/wave more people status tools tools/bcp tools/boostbook tools/build/v2 tools/inspect tools/quickbook tools/regression tools/release tools/wave wiki
From: eric_at_[hidden]
Date: 2010-02-25 17:52:29


Author: eric_niebler
Date: 2010-02-25 17:52:26 EST (Thu, 25 Feb 2010)
New Revision: 59925
URL: http://svn.boost.org/trac/boost/changeset/59925

Log:
Merged revisions 59854 via svnmerge from
https://svn.boost.org/svn/boost/trunk

........
  r59854 | eric_niebler | 2010-02-23 19:42:25 +1100 (Tue, 23 Feb 2010) | 1 line
  
  fix const correctness issues, work around fusion bug #3954
........

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Text files modified:
   branches/release/boost/proto/fusion.hpp | 20 ++++++++++++--------
   branches/release/boost/proto/transform/fold_tree.hpp | 33 +++++++++++++++++++++------------
   2 files changed, 33 insertions(+), 20 deletions(-)

Modified: branches/release/boost/proto/fusion.hpp
==============================================================================
--- branches/release/boost/proto/fusion.hpp (original)
+++ branches/release/boost/proto/fusion.hpp 2010-02-25 17:52:26 EST (Thu, 25 Feb 2010)
@@ -53,11 +53,11 @@
             typedef fusion::random_access_traversal_tag category;
             typedef tag::proto_expr_iterator fusion_tag;
 
- expr_iterator(Expr const &e)
+ expr_iterator(Expr &e)
               : expr(e)
             {}
 
- Expr const &expr;
+ Expr &expr;
         };
 
         template<typename Expr>
@@ -203,7 +203,9 @@
             typename fusion::result_of::pop_front<Expr>::type
             operator ()(Expr &e) const
             {
- return fusion::pop_front(e);
+ // Work around a const-correctness issue in Fusion
+ typedef typename fusion::result_of::pop_front<Expr>::type result_type;
+ return result_type(fusion::next(fusion::begin(e)), fusion::end(e));
             }
 
             template<typename Expr>
@@ -243,7 +245,9 @@
             typename fusion::result_of::reverse<Expr>::type
             operator ()(Expr &e) const
             {
- return fusion::reverse(e);
+ // Work around a const-correctness issue in Fusion
+ typedef typename fusion::result_of::reverse<Expr>::type result_type;
+ return result_type(e);
             }
 
             template<typename Expr>
@@ -415,7 +419,7 @@
             {
                 typedef
                     typename proto::result_of::child_c<
- typename Iterator::expr_type const &
+ typename Iterator::expr_type &
                       , Iterator::index
>::type
                 type;
@@ -431,7 +435,7 @@
             {
                 typedef
                     typename proto::result_of::value<
- typename Iterator::expr_type const &
+ typename Iterator::expr_type &
>::type
                 type;
 
@@ -537,7 +541,7 @@
             {
                 typedef proto::detail::expr_iterator<Sequence, 0> type;
 
- static type call(Sequence const &seq)
+ static type call(Sequence &seq)
                 {
                     return type(seq);
                 }
@@ -560,7 +564,7 @@
>
                 type;
 
- static type call(Sequence const &seq)
+ static type call(Sequence &seq)
                 {
                     return type(seq);
                 }

Modified: branches/release/boost/proto/transform/fold_tree.hpp
==============================================================================
--- branches/release/boost/proto/transform/fold_tree.hpp (original)
+++ branches/release/boost/proto/transform/fold_tree.hpp 2010-02-25 17:52:26 EST (Thu, 25 Feb 2010)
@@ -21,25 +21,22 @@
     namespace detail
     {
         template<typename Tag>
- struct has_tag : transform<has_tag<Tag> >
+ struct has_tag
         {
             template<typename Expr, typename State, typename Data, typename EnableIf = Tag>
             struct impl
- : transform_impl<Expr, State, Data>
             {
                 typedef mpl::false_ result_type;
             };
 
             template<typename Expr, typename State, typename Data>
             struct impl<Expr, State, Data, typename Expr::proto_tag>
- : transform_impl<Expr, State, Data>
             {
                 typedef mpl::true_ result_type;
             };
 
             template<typename Expr, typename State, typename Data>
             struct impl<Expr &, State, Data, typename Expr::proto_tag>
- : transform_impl<Expr &, State, Data>
             {
                 typedef mpl::true_ result_type;
             };
@@ -97,12 +94,18 @@
           : fold<
                 Sequence
               , State0
- , detail::fold_tree_<
- typename remove_reference<Expr>::type::proto_tag
- , Fun
- >
+ , detail::fold_tree_<typename Expr::proto_tag, Fun>
>::template impl<Expr, State, Data>
         {};
+
+ template<typename Expr, typename State, typename Data>
+ struct impl<Expr &, State, Data>
+ : fold<
+ Sequence
+ , State0
+ , detail::fold_tree_<typename Expr::proto_tag, Fun>
+ >::template impl<Expr &, State, Data>
+ {};
     };
 
     /// \brief A PrimitiveTransform that recursively applies the
@@ -146,12 +149,18 @@
           : reverse_fold<
                 Sequence
               , State0
- , detail::reverse_fold_tree_<
- typename remove_reference<Expr>::type::proto_tag
- , Fun
- >
+ , detail::reverse_fold_tree_<typename Expr::proto_tag, Fun>
>::template impl<Expr, State, Data>
         {};
+
+ template<typename Expr, typename State, typename Data>
+ struct impl<Expr &, State, Data>
+ : reverse_fold<
+ Sequence
+ , State0
+ , detail::reverse_fold_tree_<typename Expr::proto_tag, Fun>
+ >::template impl<Expr &, State, Data>
+ {};
     };
 
     /// INTERNAL ONLY


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