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From: schaefer@ogicse.ogi.edu (Barton E. Schaefer)
Newsgroups: comp.lang.c
Subject: Float-to-double promotion in ANSI C.
Message-ID: <11911@ogicse.ogi.edu>
Date: 4 Sep 90 21:28:39 GMT
References: <2020@engage.enet.dec.com> <6441@wolfen.cc.uow.oz> <MEISSNER.90Aug31103238@osf.osf.org> <11842@ogicse.ogi.edu> <RICHARD.90Sep3115406@orange.iesd.auc.dk>
Organization: Oregon Graduate Institute (formerly OGC), Beaverton, OR
Lines: 19

In article <RICHARD.90Sep3115406@orange.iesd.auc.dk> richard@iesd.auc.dk (Richard Flamsholt S0rensen) writes:
} In article <11842@ogicse.ogi.edu> schaefer@ogicse.ogi.edu (Barton E. Schaefer) writes:
} 
} >ANSI has nothing to do with it.  The only reason that floats are widened
} >to double in a function call is because they are widened to double in
} >all expression contexts.
}  ^^^^^^^^^^^^^^^^^^^^^^^
} 
}   Nope. ANSI states ....

I was referring to K&R1 C, not ANSI C.  (That's why I said "ANSI has nothing
to do with it", though I probably should have been more clear.)

Since we're on the topic, what does the Rationale say is the reason for
promotions in the case of K&R1-style declarations?  Is it simple preservation
of the old semantics, or is there more to it?  Does it give different reasons
for widening in the case of variadic functions?
-- 
Bart Schaefer						schaefer@cse.ogi.edu