Re: passing constants by pointer

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Article #49512

#49512

From: bob pasker
Date: Thu, 20 Jan 1994 02:57

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In article <rbp-190194182522@tonto-slip13.cis.brown.edu>, rbp@brown.edu
(bob pasker) wrote:

> my  VAX C compiler allows me to pass a constant by reference as follows:
> 
>                foo(&1)
> 
> but GCC gives me an "invalid lvalue". 
> 
> does anyone know the proper incantation?

i've been informed by private e-mail that C cannot do this.

i have created the following workaround:

#define BYREF(c) ({int _bar=c; &_bar;})

                foo(BYREF(1));

:-(

luckily GNU cc allows these kind of "statements within expressions."

-- 
-- bob pasker
-- brown u., dept. of history
-- rbp@brown.edu
--

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From: rbp@brown.edu (bob pasker)
Newsgroups: gnu.gcc.help
Subject: Re: passing constants by pointer
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Date: Wed, 19 Jan 1994 21:57:45 -0500
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