Re: [RFA] Status of HP/SGI extensions

[Phil Edwards <pedwards at disaster dot jaj dot com>]

On Sun, Dec 30, 2001 at 06:47:40PM +0100, Paolo Carlini wrote:
> What about keeping the helpers (that is, from a practical point of view, those
> names beginning with one or two underscores) insided namespace std, and
> viceversa putting the extension themselves into separate files in namespace
> __gnu_cxx?
> 
> Right now I don't have any better idea.

This appeals to me.  I (personally) feel that the uglified extensions don't
need to be removed from std:: if we're using them as helpers to implement
other things (for example, __uninitialized_copy_fill).  We could leave
those where they are, and document them as helper functions.

Then in ext/* it would simply be a matter of

    namespace __gnu_cxx
    {
        using std::__uninitialized_copy_fill;
    }


stl_deque.h uses some others also.  For example, stl_iterator_base_funcs.h
defines an additional version of std::distance(), taking three parameters.
I just now changed deque::_M_range_initialize as follows:

    -  size_type __n = 0;
    -  distance(__first, __last, __n);
    +  size_type __n = distance(__first, __last);

The 3-parameter distance() extension is one that should be moved into ext,
since we don't need to use it anywhere in bits/*.  Occurrances should be
fixed to use the standard 2-parameter version.


Phil

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