Re: [Boost-bugs] [Boost C++ Libraries] #1894: fusion\support\tag_of.hpp, boost::fusion::traits

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #1894: fusion\support\tag_of.hpp, boost::fusion::traits
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-10-23 15:52:03

#1894: fusion\support\tag_of.hpp, boost::fusion::traits
--------------------------------------------------------+-------------------
  Reporter:  Mikhail Strelnikov <strelnikov_at_[hidden]>  |       Owner:  djowel              
      Type:  Bugs                                       |      Status:  new                 
 Milestone:  Boost 1.36.0                               |   Component:  fusion              
   Version:  Boost 1.35.0                               |    Severity:  Problem             
Resolution:                                             |    Keywords:  deduce_sequence, mpl
--------------------------------------------------------+-------------------

Comment(by Mikhail Strelnikov <strelnikov_at_[hidden]>):

 There is what I propose to change in 'boost/fusion/support/tag_of.hpp'
 (I'm not sure if these changes are ideologically correct but all the
 Boost::Fusion tests are passed with them):

 {{{
 Comparing files tag_of.hpp and TAG_OF.HPP_OLD
 ***** tag_of.hpp
         struct tag_of
           : mpl::if_< fusion::detail::is_mpl_sequence<Sequence>,
               mpl::identity<mpl_sequence_tag>,
 ***** TAG_OF.HPP_OLD
         struct tag_of
           : mpl::if_< detail::is_mpl_sequence<Sequence>,
               mpl::identity<mpl_sequence_tag>,
 *****

 ***** tag_of.hpp
         {
 BOOST_MPL_ASSERT_NOT((fusion::detail::is_specialized<Sequence>));
         };
 ***** TAG_OF.HPP_OLD
         {
             BOOST_MPL_ASSERT_NOT((detail::is_specialized<Sequence>));
         };
 *****
 }}}

 Thanks.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1894#comment:1>
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