1  /* Test :: token not in C17.  */
       2  /* { dg-do preprocess } */
       3  /* { dg-options "-std=c17 -pedantic-errors" } */
       4  
       5  #define CONCAT(x, y) x ## y
       6  
       7  CONCAT (:, :) /* { dg-error "does not give a valid preprocessing token" } */
       8  CONCAT (::, >)