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Section: 220.127.116.11 [includes] Status: NAD Editorial Submitter: Alisdair Meredith Opened: 2008-07-02 Last modified: 2016-02-10
Priority: Not Prioritized
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In 18.104.22.168 [includes] the complexity is "at most -1 comparisons" if passed two empty ranges. I don't know how to perform a negative number of comparisions!
This same issue also applies to:
[ 2009-03-30 Beman adds: ]
Suggest NAD. The complexity of empty ranges is -1 in other places in the standard. See 23.7.5 [alg.merge] merge and inplace_merge, and forward_list merge, for example. The time and effort to find and fix all places in the standard where empty range[s] result in negative complexity isn't worth the very limited benefit.
[ 2009-05-09 Alisdair adds: ]
I'm not happy with NAD if we can find a simple solution.
How about adding a rider somewhere in clause 17 suggesting that complexities that specify a negative number of operations are treated as specifying zero operations? That should generically solve the issue without looking for further cases.
[ Batavia (2009-05): ]
Pete to provide "straightforward" wording. Move to NAD Editorial.