That's one thing that's long overdue. Allocators are really badly designed - containers among other things expect allocators to be stateless, so swapping two strings in different shared memory segments is impossible to do correctly, according to the Standard.
Posted Mar 30, 2013 17:44 UTC (Sat) by jwakely (subscriber, #60262)
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No, "according to the Standard" containers do not expect allocators to be stateless. The weasel words allowing them to assume allocators are equal were removed for C++11 and the new propagation traits and scoped allocator model make it well-defined what happens when two containers with non-equal allocators interact.