Message118133
| Author |
mark.dickinson |
| Recipients |
amaury.forgeotdarc, eric.smith, mark.dickinson, pitrou, rhettinger, stutzbach |
| Date |
2010年10月07日.21:04:01 |
| SpamBayes Score |
0.00083394756 |
| Marked as misclassified |
No |
| Message-id |
<1286485442.93.0.345929097918.issue10044@psf.upfronthosting.co.za> |
| In-reply-to |
| Content |
> I can't say anything about the standard, but p > q looks like it should
> be the same as (p - q) > 0
Yep.
> which looks rather well-defined for pointers.
Nope. It's only well-defined for pointers pointing into the same array (or to one past the end of an array). Otherwise it's undefined behaviour.
See section 6.5.6, paragraph 9, of
http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf |
|