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From: Moore, Paul (paul.moore_at_[hidden])
Date: 2001-01-22 05:19:08

From: Dean Sturtevant [mailto:deansturtevant_at_[hidden]]
> I find it hard to imagine a case where std::swap is more efficient
> than assignment, unless the assignment is coded inefficiently. Can
> you provide an example where that might not be the case?

My thought was a long-integer type where the internal representation was a
(potentially) large array of "digits". The swap operation could be a simple
pointer exchange, whereas assignment would need allocation and copying of a
new digit array. (Assuming reference counting isn't used, possibly for
thread-safety reasons).

It seems fairly likely that this would be the case.


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