Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!uxc!tank!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.lang.c
Subject: Re: Lvalues and casts
Message-ID: <17738@mimsy.UUCP>
Date: 25 May 89 03:27:58 GMT
References: <847@tub.UUCP> <1989May23.225818.9602@utzoo.uucp> <1912@ektools.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 17

In article <1912@ektools.UUCP> randolph@ektools.UUCP (Gary L. Randolph)
writes:
>... I have an extension to the original question.  I have
>used casts on the LHS of assignment, but without actually assigning to 
>the cast.  Example:
 ...
>if (semaphore=='a')
>    *(int *)data = 22;
>else if (semaphore=='b')
>    *(float *)data = 64;

The result of a cast is not an lvalue, but the result of an indirection
*is* an lvalue.  These assignments are thus to lvalues and hence legal
(provided, of course, the pointers point at the right objects).
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris