[Patch, v7] libstdc++/24617 (was: Re: [Patch] libstdc++/23425)

[Paolo Carlini]

Howard Hinnant wrote:

> clear() is best not thought of as a special case of erase().  It is 
> best thought of as a special case of a private function which I'll call:
>
> void __erase_at_end(size_type n);
>
> Erases the last n elements from the vector.  This is needed in the 
> following public members of vector:
>
> All forms of assign.
> All forms of erase.
> All forms of resize.
> clear.

The below implements Howard's suggestion in the v7-branch. Needless to
say, I like the idea a lot, and, assuming we agree on the
implementation, after some additional testing I'm in favor of having an
appropriate version of it also in 4.1.x (x > 0). Tested x86-linux.

Paolo.

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