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/* $OpenBSD: test-20.c,v 1.2 2006/05/03 18:23:17 otto Exp $ */
/*
* Placed in the public domain by Otto Moerbeek <otto@drijf.net>.
*
* Test the 'expression has null effect warning'
*/
#include <assert.h>
int f(int x,...)
{
int p;
char *q = 0;
int i = (1,33), j = (p=0,p), k = (i+j, i=0);
int a = i < 1 ? j : i, b = 2, t;
t = a, a = b, b = t;
1 + b, t = a, a = b, b = t, a + 1, b - 1;
a + t, t = b;
a + 1;
b + 1, t = t;
t = t, b + 1;
1 + a;
1,2,3,4,5;
a = (1,(b=2),3,4,5);
if (a + 1, b)
a = 2;
a ? b=1 : t;
a + 1, b = 1, t + 1;
a = (1,b,f(a,(a,b),t));
*q = 0, *q = 0, *q = 0, *q = 0, *q = 0;
*q + 0, *q = 0, *q = 0, *q = 0, *q = 0;
q ? q = 0 : q++;
assert(p == j);
0;
(void)0;
j = j < 0 ? j + 1 : j + 2;
return k + k, x;
}
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