Re: [Boost-users] [container][slist] constant time splice_after

Subject: Re: [Boost-users] [container][slist] constant time splice_after
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2014-09-14 13:01:50

El 13/09/2014 12:06, Aaron Levy escribió:
> What happens if I call slist::splice_after(this_iter, that_list,
> that_begin, that_end, nelems) with an nelems value that does not
> match std::distance(that_begin, that_end). In other words, is there
> any kind of validations performed on nelems and is it just used to
> update the size of the list?

No. In Debug mode, I think the implementation does the check, but any 
check in runtme would invalidate the aim of the functions, which is O(1) 
splice. is nelems != std::distance(that_begin, that_end), then it's 
undefined behaviour. The documentation says this in the "Requires" 
clause, if the prerequisites are not met, then there is no guarantee.

Best

Ion