Re: [Boost-users] [fusion] probably a bug in result_of::join

Subject: Re: [Boost-users] [fusion] probably a bug in result_of::join
From: jl (jl_at_[hidden])
Date: 2009-10-14 10:35:22

Christopher Schmidt writes: 

> Yeah, this is a major issue of the current fusion implementation. The 
> result_of::-metafunctions do not regard that the actual functions take 
> const-qualified arguments only. On top of that the documentation is 
> outdated and misleading.

Well you could make functions, metafunctions and doc agree like this:

    namespace result_of
    {
        template<typename LhSequence, typename RhSequence>
        struct join
        {
            typedef joint_view<
              typename add_const<LhSequence>::type,
              typename add_const<RhSequence>::type
            > type;
        };
    } 

> My C++0x port of fusion introduces non-const arguments for the algorithm 
> functions and a new result_of::-concept which allows passing (optionally) 
> cv and ref qualified types.

Do you plan to support that in the version for the "old" compilers as well? 

J-L