gcc/testsuite/gcc.dg/cpp/20000519-1.c

   1 /* Regression test for preprocessor crash.
   2    Reported by Mathias Froehlich <frohlich@na.uni-tuebingen.de>.  */
   3 /* { dg-do preprocess } */
   4 #define foo
   5
   6 #define __CAT__(a,b,c,d) a##b##c##d
   7 #define CAT(a,b,c,d) __CAT__(a,b,c,d)
   8
   9 #define bar CAT(,foo,bar,)
  10 bar