Newsgroups: comp.lang.c
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: Of Standards and Inventions: A Cautionary Tale
Message-ID: <1988Apr13.163235.420@utzoo.uucp>
Organization: U of Toronto Zoology
References: <10949@mimsy.UUCP> <1525@dataio.Data-IO.COM>
Date: Wed, 13 Apr 88 16:32:35 GMT

> 	#elif (1<<63) < 0
> 	#define int_size_in_bits	64
> 	...
> do the job, or may the preprocessor and compiler interpret int constants
> differently?

As I recall (my copy of the draft isn't handy), there is some room for
different interpretation of compile-time operations.  Furthermore, even
ignoring that, there is another problem:  the result of shifting beyond
the available number of bits is implementation-defined (or possibly
even undefined).
-- 
"Noalias must go.  This is           |  Henry Spencer @ U of Toronto Zoology
non-negotiable."  --DMR              | {allegra,ihnp4,decvax,utai}!utzoo!henry