ref: 3eb88c0d7a390c249fd74f973b6e6f14549b6a39
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 main(void) { int foo, bar, foobar; CAT(foo,bar) = foo + bar; XCAT(FOO,BAR) = foo + bar; return 0; }