gcc/testsuite/g++.old-deja/g++.other/sizeof4.C

   1 // Build don't link:
   2
   3 // Copyright (C) 1999 Free Software Foundation, Inc.
   4 // Contributed by Nathan Sidwell 5 Sep 1999 <nathan@acm.org>
   5
   6 // C++ does not decay lvalues into rvalues until as late as possible. This
   7 // means things like the rhs of a comma operator mustn't decay. This will make
   8 // a difference if it is an array or function.
   9
  10 struct S;
  11 struct T {int m;};
  12 extern S s;  // an incomplete
  13 extern S arys[20];  // an incomplete array
  14 extern T aryt[];    // an incomplete array;
  15
  16 void fn () {}
  17
  18 int main (int argc, char **argv)
  19 {
  20   sizeof (s);           // ERROR - incomplete
  21   sizeof (0, s);        // ERROR - incomplete
  22   sizeof (argc ? s : s); // ERROR - incomplete
  23
  24   sizeof (arys);        // ERROR - incomplete
  25   sizeof (0, arys);     // ERROR - incomplete XFAIL
  26   sizeof (argc ? arys : arys); // ERROR - incomplete
  27
  28   sizeof (aryt);        // ERROR - incomplete
  29   sizeof (0, aryt);     // ERROR - incomplete XFAIL
  30   sizeof (argc ? aryt : aryt); // ERROR - incomplete
  31
  32   sizeof (fn);            // ERROR - cannot take size of function
  33   sizeof (0, fn);         // ERROR - cannot take size of function XFAIL
  34   sizeof (argc ? fn : fn); // ERROR - cannot take size of function
  35
  36   sizeof (&fn);       // ok
  37   sizeof (0, &fn);    // ok
  38   sizeof (argc ? &fn : &fn); // ok
  39
  40   return 0;
  41 }