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Article #2822

Re: Undefined #pragmas are evil

#2822
From: Jerry Coffin
Date: Mon, 04 Dec 1995 16:29
30 lines
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clamage@Eng.Sun.COM (Steve Clamage) wrote:

[ mention of requiring unrecognized #pragmas to be errors elided... ] 

>IMHO, pragmas should be reserved for things like turning error reporting
>or optimizations on and off. That is, things that don't (necessarily)
>affect program correctness, but convenience, efficiency, and the like.
>More significant pragmas might have a place in special-purpose compilers,
>such as for embedded systems, where programs are inherently unportable.

IMO, the real problem is that pragmas are allowed to do almost anything
- I haven't checked the DWP on it, but the C standard simply specifies
that they cause the program to act in an implementation defined manner,
with no limitations.

IMO, a pragma should be required to have no effect detectable by a
strictly conforming program.
    Later,
    Jerry.

/* I can barely express my own opinions; I certainly can't
 * express anybody else's.
 *
 * The universe is a figment of its own imagination.
 */


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Path: arc1-ca.pugleaf.net!engnews2.Eng.Sun.COM!taumet!clamage
From: jcoffin@rmii.com (Jerry Coffin)
Newsgroups: comp.std.c++
Subject: Re: Undefined #pragmas are evil
Date: 4 Dec 1995 16:29:25 GMT
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