1 #![feature(box_syntax)]
3 struct Fat<T: ?Sized> {
10 fn foo(x: &Fat<[isize]>) {
12 assert_eq!(x.ptr.len(), 3);
14 assert_eq!(x.ptr[1], 2);
16 assert_eq!(x.f2, "some str");
19 fn foo2<T: ToBar>(x: &Fat<[T]>) {
22 assert_eq!(x.ptr.len(), 3);
23 assert_eq!(y[0].to_bar(), bar);
24 assert_eq!(x.ptr[1].to_bar(), bar);
26 assert_eq!(x.f2, "some str");
29 fn foo3(x: &Fat<Fat<[isize]>>) {
32 assert_eq!(x.f2, "some str");
33 assert_eq!(x.ptr.f1, 8);
34 assert_eq!(x.ptr.f2, "deep str");
35 assert_eq!(x.ptr.ptr.len(), 3);
37 assert_eq!(x.ptr.ptr[1], 2);
40 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
44 fn to_bar(&self) -> Bar;
48 fn to_bar(&self) -> Bar {
54 // With a vec of ints.
55 let f1: Fat<[isize; 3]> = Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
57 let f2: &Fat<[isize; 3]> = &f1;
59 let f3: &Fat<[isize]> = f2;
61 let f4: &Fat<[isize]> = &f1;
63 let f5: &Fat<[isize]> = &Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
66 // With a vec of Bars.
68 let f1 = Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
72 let f3: &Fat<[Bar]> = f2;
74 let f4: &Fat<[Bar]> = &f1;
76 let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
80 let f5: &mut Fat<[isize]> = &mut Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
82 assert_eq!(f5.ptr[0], 1);
83 assert_eq!(f5.ptr[1], 34);
84 assert_eq!(f5.ptr[2], 3);
87 let f5: &Fat<[isize]> = &Fat { f1: 5, f2: "some str", ptr: [] };
88 assert!(f5.ptr.is_empty());
89 let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [] };
90 assert!(f5.ptr.is_empty());
93 let f1 = Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3] } };
97 let f3: &Fat<Fat<[isize]>> = f2;
99 let f4: &Fat<Fat<[isize]>> = &f1;
101 let f5: &Fat<Fat<[isize]>> =
102 &Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3] } };
106 let f1 = Box::new([1, 2, 3]);
107 assert_eq!((*f1)[1], 2);
108 let f2: Box<[isize]> = f1;
109 assert_eq!((*f2)[1], 2);
112 let f1: Box<Fat<[isize; 3]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
114 let f2: Box<Fat<[isize]>> = f1;
117 let f3: Box<Fat<[isize]>> =
118 Box::<Fat<[_; 3]>>::new(Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] });
120 let f4: Box<Fat<[isize]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };