gcc/testsuite/gcc.dg/c90-hexfloat-2.c

   1 /* Test for hex floating point constants: in C99 only.  Preprocessor test.  */
   2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   5
   6 #define f (
   7 #define l )
   8 #define str(x) #x
   9 #define xstr(x) str(x)
  10
  11 /* C90: "0x1p+( 0x1p+)"; C99: "0x1p+f 0x1p+l" */
  12 const char *s = xstr(0x1p+f 0x1p+l);
  13
  14 extern void abort (void);
  15 extern int strcmp (const char *, const char *);
  16
  17 int
  18 main (void)
  19 {
  20   if (strcmp (s, "0x1p+( 0x1p+)"))
  21     abort ();
  22   else
  23     return 0; /* Correct C90 behavior.  */
  24 }