At Tue, 12 Apr 2011 12:15:56 -0500, Nevin Liber wrote:
On 12 April 2011 11:53, Phil Bouchard <philippe@fornux.com> wrote:
On 4/12/2011 8:04 AM, Dave Abrahams wrote:
I think you are severely missing the point: it is not implementable, no matter the cost in complexity, without causing undefined behavior. You're just not allowed to compare arbitrary pointers with<, and the total ordering produce by std::less isn't guaranteed to be meaningful.
Thanks for the clarifications but if the stack and data segments were part of a pool then 'false' returned by is_from() would then be a valid according to the definition of is_from().
Only if it is implemented the way Steven described it. You cannot legally compare pointers using relationship operators (<, <=, >, >=) unless at least one is NULL,
really, in C++ you can do it if one is NULL? What result do you get? -- Dave Abrahams BoostPro Computing http://www.boostpro.com