Internals for STL containers

[Paolo Carlini]

Hi,
> However, _M_impl, _M_start etc are gcc internals and it might be risky for
> Emacs to rely on them.  Can anyone say how likely these internals are to
> change?  I'm not asking for a guarantee.  It would be helpful just to know
> when they last changed as an indication of how volatile this code might be.
I would say they are pretty stable, because we have a stable ABI which
we are not going to break until C++0x: that means we can only implement
limited span changes, we cannot add data members, for example neither
change the memory layout of the classes.

Paolo.