On 2011-04-13 19:40, Dave Abrahams wrote:
On Wed, Apr 13, 2011 at 1:32 PM, Anders Dalvander<boost@dalvander.com> wrote:
Externally a contiguous memory block would be seen as a singleton and comparing it using std::less to any other contiguous memory block would result in either true or false.
The issue is that if you test an address for being within a given memory block, you can get false positives.
But that's just the deal, we don't have to test, std::less does it for us.
Oh, and to make things worse, IIRC there's nothing that says a< b == std::less<...>()(a,b) even within a given block, e.g. std::less<>()(a,b) could be implemented as a> b! So you can get false negatives, too.
Don't think so, 20.3.3/5 states: template <class T> struct less : binary_function<T,T,bool> { bool operator()(const T& x, const T& y) const; }; operator() returns x < y.
WWFSMD?
Advance the tape!
Probably the best, although slow, thing to do. Regards, Anders Dalvander