[Boost-commit] svn:boost r56322 - in branches/release: . boost/algorithm/string boost/archive boost/fusion boost/graph boost/program_options boost/python boost/regex boost/serialization boost/signals boost/signals2 boost/spirit boost/system boost/wave libs/graph_parallel libs/mpl/doc/refmanual libs/mpl/doc/src/refmanual libs/program_options libs/proto/doc libs/python libs/regex libs/serialization libs/signals libs/signals2 libs/spirit libs/system libs/timer libs/wave status tools/build/v2 tools/regression tools/wave

Subject: [Boost-commit] svn:boost r56322 - in branches/release: . boost/algorithm/string boost/archive boost/fusion boost/graph boost/program_options boost/python boost/regex boost/serialization boost/signals boost/signals2 boost/spirit boost/system boost/wave libs/graph_parallel libs/mpl/doc/refmanual libs/mpl/doc/src/refmanual libs/program_options libs/proto/doc libs/python libs/regex libs/serialization libs/signals libs/signals2 libs/spirit libs/system libs/timer libs/wave status tools/build/v2 tools/regression tools/wave
From: eric_at_[hidden]
Date: 2009-09-20 11:17:13

Author: eric_niebler
Date: 2009-09-20 11:17:13 EDT (Sun, 20 Sep 2009)
New Revision: 56322
URL: http://svn.boost.org/trac/boost/changeset/56322

Log:
Merged revisions 56321 via svnmerge from 
https://svn.boost.org/svn/boost/trunk

........
  r56321 | eric_niebler | 2009-09-20 11:09:28 -0400 (Sun, 20 Sep 2009) | 1 line
  
  const-qualify return type of pow() function
........

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Text files modified: 
   branches/release/libs/proto/doc/front_end.qbk |     8 ++++----                                
   1 files changed, 4 insertions(+), 4 deletions(-)

Modified: branches/release/libs/proto/doc/front_end.qbk
==============================================================================
--- branches/release/libs/proto/doc/front_end.qbk	(original)
+++ branches/release/libs/proto/doc/front_end.qbk	2009-09-20 11:17:13 EDT (Sun, 20 Sep 2009)
@@ -169,7 +169,7 @@
     typename proto::function<
         typename proto::terminal<pow_fun<Exp> >::type
       , Arg const &
-    >::type
+    >::type const
     pow(Arg const &arg)
     {
         typedef
@@ -214,7 +214,7 @@
     typename proto::function<
         typename proto::terminal<pow_fun<Exp> >::type
       , Arg const & // <=== ERROR! This may not be a Proto type!
-    >::type
+    >::type const
     pow(Arg const &arg)
 
 What we want is a way to make `Arg` into a Proto terminal if it is not a Proto expression already, and leave it alone if it is. For that, we can use _as_child_. The following implementation of the `pow()` function handles all argument types, expression templates or otherwise.
@@ -226,7 +226,7 @@
     typename proto::function<
         typename proto::terminal<pow_fun<Exp> >::type
       , typename proto::result_of::as_child<Arg const>::type
-    >::type
+    >::type const
     pow(Arg const &arg)
     {
         typedef
@@ -255,7 +255,7 @@
         proto::tag::function  // Tag type
       , pow_fun<Exp>          // First child (by value)
       , Arg const &           // Second child (by reference)
-    >::type
+    >::type const
     pow(Arg const &arg)
     {
         return proto::make_expr<proto::tag::function>(