modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/compile/921227-1.c (about)

     1  #define k(a) #a
     2  char *s = k(k(1,2));
     3  char *t = k(#) k(#undef k) k(x);
     4  
     5  f(){}