Re: STL Hash Classes

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2 total messages Started by Beman Dawes Mon, 13 Nov 1995 07:44

#2538

Author: Beman Dawes
Date: Mon, 13 Nov 1995 07:44

31 lines
1433 bytes

 
>
>Can any one tell me the status of the STL associative containers
>based on hash tables (e.g., hash_set, hash_map, etc.)?  In
>particular, will they be part of final C++ standard?

STL-like hash tables were rejected by the committee at two separate
meetings.  The rejections stemmed from concerns about non-technical
issues such as schedule.

>  I certainly
>hope so, but I would like to know if they are being given strong
>consideration for the next revision of the standard.  I was
>surprised when I discovered them missing from the draft.

If by "next revision" you mean the 2nd Committee Draft, due next
spring, then the answer is no, not a chance.  If you mean the
revision that comes 5-years after the standard is complete, the
answer is that it is far too early to tell what will or will not be
included.

--Beman
 



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Re: STL Hash Classes

#2585

Author: Dick Menninger
Date: Thu, 16 Nov 1995 03:03

32 lines
2007 bytes

I get the impression that the complex job of creating
a standard (having already included so much) is creating
a familiar vacuum.  The vacuum is composed of all of the
stuff that may be good technically, but cannot make the
cut of doable in the schedule.  For large software projects,
a major gap is reduced by there being a second effort
underway that overlaps the first, to flesh out those things
that should be there but could not.

There needs to be different amounts of inertia for
changes in the language and natural completion of
the library contents.  The language needs more inertia
than natural completion (or extension, if you prefer)
of the libraries.  But it seems that it may be the other
way around, because of the difference in the amount
of work involved.

A second tier of effort may be needed here as 5 years
is too long.  Actually, a second tier WILL happen.
it is just the matter of whether it has official significance
now (or merely usurps it later).  This kind of vacuum never
lasts.

Just some thoughts

Good Day
Dick
Dick.Menninger@DaytonOH.ATTGIS.COM
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