gcc/testsuite/gcc.dg/c90-array-lval-3.c

   1 /* Test for non-lvalue arrays decaying to pointers: in C99 only.
   2    Test various ways of producing non-lvalue arrays.  */
   3 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   4 /* { dg-do compile } */
   5 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   6
   7 struct s { char c[1]; };
   8 struct s a, b, c;
   9 int d;
  10
  11 void
  12 bar (void)
  13 {
  14   char *t;
  15   (d ? b : c).c[0]; /* { dg-bogus "warning" "warning in place of error" } */
  16   (d, b).c[0]; /* { dg-bogus "warning" "warning in place of error" } */
  17   (a = b).c[0]; /* { dg-bogus "warning" "warning in place of error" } */
  18   t = (d ? b : c).c; /* { dg-bogus "warning" "warning in place of error" } */
  19   t = (d, b).c; /* { dg-bogus "warning" "warning in place of error" } */
  20   t = (a = b).c; /* { dg-bogus "warning" "warning in place of error" } */
  21   (d ? b : c).c + 1; /* { dg-bogus "warning" "warning in place of error" } */
  22   (d, b).c + 1; /* { dg-bogus "warning" "warning in place of error" } */
  23   (a = b).c + 1; /* { dg-bogus "warning" "warning in place of error" } */
  24 }
  25 /* { dg-error "non-lvalue" "array not decaying to lvalue" { target *-*-* } 15 }
  26    { dg-error "non-lvalue" "array not decaying to lvalue" { target *-*-* } 16 }
  27    { dg-error "non-lvalue" "array not decaying to lvalue" { target *-*-* } 17 }
  28    { dg-error "non-lvalue|incompatible" "array not decaying to lvalue" { target *-*-* } 18 }
  29    { dg-error "non-lvalue|incompatible" "array not decaying to lvalue" { target *-*-* } 19 }
  30    { dg-error "non-lvalue|incompatible" "array not decaying to lvalue" { target *-*-* } 20 }
  31    { dg-error "non-lvalue|invalid" "array not decaying to lvalue" { target *-*-* } 21 }
  32    { dg-error "non-lvalue|invalid" "array not decaying to lvalue" { target *-*-* } 22 }
  33    { dg-error "non-lvalue|invalid" "array not decaying to lvalue" { target *-*-* } 23 }
  34 */