ref: eda3eda0e85209d3a18460f2b569f469fc1610a4
dir: /tests/cc/execute/0152-cat.c/
#define CAT(x,y) x ## y
#define XCAT(x,y) CAT(x,y)
#define FOO foo
#define BAR bar
int foobar;
int
main(void)
{
int foo = 1, bar = 0;
CAT(foo,bar) += foo + bar;
if (foobar != 1)
return 1;
XCAT(FOO,BAR) += foo + bar;
if (foobar != 2)
return 2;
return 0;
}