Re: [Boost-users] [iterators][range][rangeex] range concatenation

Subject: Re: [Boost-users] [iterators][range][rangeex] range concatenation
From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2009-04-07 15:54:23

Steven Watanabe skrev:
> AMDG
> 
> Thorsten Ottosen wrote:
>> I suspect that r1 | join(r2) | join(r3) will be less efficient than
>> join(r1,r2,r3), because the former will lead to double checks
>> of which range that is being iterated, unless there is some clever way
>> to avoid that. But the | joined(r1,r2) syntax or whatever is fine with 
>> me.
> 
> It would be pretty easy to make r1 | join(r2) recognize whether
> r1 and r1 are themselves joint_views.

Right, but is it easy to "unroll" the necessary information
inside e.g. increment()?

-Thorsten