Re: [IDEA+RFC] Possible solution for min()/max() war

From: Andreas Schwab (schwab@suse.de)
Date: Tue Aug 28 2001 - 15:34:54 EST


Brad Chapman <kakadu_croc@yahoo.com> writes:

|> Everyone,
|>
|> From reading this thread, I believe I have come up with several reasons,
|> IMHO, why the old min()/max() macros were not usable:
|>
|> - They did not take into account non-typesafe comparisons
|> - They were too generic
|> - Some versions, IIRC, relied on typeof()
|> - They did not take into account signed/unsigned conversions
|>
|> I have also discovered one problem with the new three-arg min()/max()
|> macro: it forces both arguments to be the same, thus preventing signed/unsigned
|> comparisons.

There is no such thing as signed/unsigned comparision in C. Any
comparison is either signed or unsigned, depending on whether the common
type of arguments after applying the usual arithmetic conversions is
signed or unsigned.

|> Thus, I have a humble idea: add another type argument!

This does not bye you anything because the there can only be one common
type anyway.

Andreas.

-- 
Andreas Schwab                                  "And now for something
SuSE Labs                                        completely different."
Andreas.Schwab@suse.de
SuSE GmbH, Schanzäckerstr. 10, D-90443 Nürnberg
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