Re: [boost] [fusion] pop_back doesn't work on fwd sequences

Subject: Re: [boost] [fusion] pop_back doesn't work on fwd sequences
From: Joel de Guzman (joel_at_[hidden])
Date: 2011-08-11 21:24:08

On 8/12/2011 9:08 AM, Eric Niebler wrote:

> I wanted to test this, so I tried the following:
> 
>     using namespace boost::fusion;
>     auto vec = make_vector(1, 3.14, "hello");
>     auto push = push_back(vec, 42);
>     auto pop = pop_back(push);
> 
>     auto i1 = find<int>(pop);
>     auto i2 = find<double>(pop);
> 
>     assert(i1 != end(pop));
>     assert(i2 != end(pop));
>     assert(i1 != i2);
> 
> It doesn't compile for me. I think it should. And I would hope none of
> the asserts fire. Will that be the case?

I think so. It's most probably a bug in the implementation. I'll go
check it out.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com