casting as lvalue, inconsistency

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1 total messages Started by Ori Dvir Mon, 25 Nov 1996 00:00

#6186

Author: Ori Dvir
Date: Mon, 25 Nov 1996 00:00

30 lines
1099 bytes


Hi, 
I have a problem: inconsistent treetment of cast expressions.

Here is the program p1.c: 

int * int_ptr;
short * short_ptr;
char * char_ptr;

f1()
{
    ((char *)(int_ptr)) += 4;
    ((char *)(short_ptr)) += 4;
    ((char *)(char_ptr)) += 4;
}

gcc -pedantic p1.c

p1.c: In function `f1':
p1.c:7: warning: ANSI C forbids use of cast expressions as lvalues
p1.c:8: warning: ANSI C forbids use of cast expressions as lvalues
p1.c:9: invalid lvalue in assigmnet

In the first two cases a warning is issued, and the last case causes an error.
I'm using gcc 2.7.2.
What do you think?

Ori dvir : orid@taux01.nsc.com

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