src/test/ui/unsized/unsized6.rs

   1 // Test `?Sized` local variables.
   2
   3 trait T {}
   4
   5 fn f1<W: ?Sized, X: ?Sized, Y: ?Sized, Z: ?Sized>(x: &X) {
   6     let _: W; // <-- this is OK, no bindings created, no initializer.
   7     let _: (isize, (X, isize));
   8     //~^ ERROR the size for values of type
   9     let y: Y;
  10     //~^ ERROR the size for values of type
  11     let y: (isize, (Z, usize));
  12     //~^ ERROR the size for values of type
  13 }
  14 fn f2<X: ?Sized, Y: ?Sized>(x: &X) {
  15     let y: X;
  16     //~^ ERROR the size for values of type
  17     let y: (isize, (Y, isize));
  18     //~^ ERROR the size for values of type
  19 }
  20
  21 fn f3<X: ?Sized>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
  22     let y: X = *x1;
  23     //~^ ERROR the size for values of type
  24     let y = *x2;
  25     //~^ ERROR the size for values of type
  26     let (y, z) = (*x3, 4);
  27     //~^ ERROR the size for values of type
  28 }
  29 fn f4<X: ?Sized + T>(x1: Box<X>, x2: Box<X>, x3: Box<X>) {
  30     let y: X = *x1;
  31     //~^ ERROR the size for values of type
  32     let y = *x2;
  33     //~^ ERROR the size for values of type
  34     let (y, z) = (*x3, 4);
  35     //~^ ERROR the size for values of type
  36 }
  37
  38 fn g1<X: ?Sized>(x: X) {}
  39 //~^ ERROR the size for values of type
  40 fn g2<X: ?Sized + T>(x: X) {}
  41 //~^ ERROR the size for values of type
  42
  43 pub fn main() {
  44 }