Bjorn.Karlsson@readsoft.com wrote:
From: Daniel Frey [mailto:daniel.frey@aixigo.de]
Should we propose std::regress (the counter-part for std::advance) for standardization (via a DR)? The current definition of std::advance seems to limit the number of elements that can be skipped backwards to signed types, but the container can be larger (OK, in theory, never tried it myself :). This would also nicely solve the implementation issue for us.
I don't think it's really a defect; there's a slight inconsistency with regards to the max/min values on most platforms, but nothing inherently wrong AFAICS. Note that the reverse_iterator trick can be used by client code too, so the "signed type limit" is easily defeated.
The reason to call it a DR is, that it can be handled faster and easier than a real extension. :) I just don't know if this is acceptable. What to the standard guys around here say? Worth a try? Regards, Daniel -- Daniel Frey aixigo AG - financial solutions & technology Schloß-Rahe-Straße 15, 52072 Aachen, Germany fon: +49 (0)241 936737-42, fax: +49 (0)241 936737-99 eMail: daniel.frey@aixigo.de, web: http://www.aixigo.de