Re: [Boost-bugs] [Boost C++ Libraries] #7304: size of a fusion sequences is signed, should be unsigned

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7304: size of a fusion sequences is signed, should be unsigned
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-09-06 13:50:19

#7304: size of a fusion sequences is signed, should be unsigned
--------------------------------------+-------------------------------------
  Reporter:  mgaunard                 |       Owner:  djowel 
      Type:  Bugs                     |      Status:  new    
 Milestone:  To Be Determined         |   Component:  fusion 
   Version:  Boost Development Trunk  |    Severity:  Problem
Resolution:                           |    Keywords:         
--------------------------------------+-------------------------------------

Comment (by djowel):

 Pedantic. fusion follows MPL's implementation which also uses int
 (signed). See the implementation of mpl::list for example. And see :
 http://www.boost.org/doc/libs/1_51_0/libs/mpl/doc/refmanual/forward-

 sequence.html which specifies size as an Integral Constant with no
 requirement that it be unsigned. E.g. (mpl::vector):

   template<>
   struct size_impl< aux::vector_tag<1> >
   {
     template< typename Vector > struct apply
         : long_<1>
     {
     };
   };

 Anyway, if you have a patch (it's library wide), I'd welcome it, but i
 wonder how it would jive with MPL. E.g.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7304#comment:1>
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