1 files changed, 122 insertions, 0 deletions
diff --git a/src/test/ui/dynamically-sized-types/dst-struct.rs b/src/test/ui/dynamically-sized-types/dst-struct.rs
new file mode 100644
index 000000000..25ec07b88
--- /dev/null
+++ b/src/test/ui/dynamically-sized-types/dst-struct.rs
@@ -0,0 +1,122 @@
+// run-pass
+#![feature(box_syntax)]
+
+struct Fat<T: ?Sized> {
+    f1: isize,
+    f2: &'static str,
+    ptr: T
+}
+
+// x is a fat pointer
+fn foo(x: &Fat<[isize]>) {
+    let y = &x.ptr;
+    assert_eq!(x.ptr.len(), 3);
+    assert_eq!(y[0], 1);
+    assert_eq!(x.ptr[1], 2);
+    assert_eq!(x.f1, 5);
+    assert_eq!(x.f2, "some str");
+}
+
+fn foo2<T:ToBar>(x: &Fat<[T]>) {
+    let y = &x.ptr;
+    let bar = Bar;
+    assert_eq!(x.ptr.len(), 3);
+    assert_eq!(y[0].to_bar(), bar);
+    assert_eq!(x.ptr[1].to_bar(), bar);
+    assert_eq!(x.f1, 5);
+    assert_eq!(x.f2, "some str");
+}
+
+fn foo3(x: &Fat<Fat<[isize]>>) {
+    let y = &x.ptr.ptr;
+    assert_eq!(x.f1, 5);
+    assert_eq!(x.f2, "some str");
+    assert_eq!(x.ptr.f1, 8);
+    assert_eq!(x.ptr.f2, "deep str");
+    assert_eq!(x.ptr.ptr.len(), 3);
+    assert_eq!(y[0], 1);
+    assert_eq!(x.ptr.ptr[1], 2);
+}
+
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+struct Bar;
+
+trait ToBar {
+    fn to_bar(&self) -> Bar;
+}
+
+impl ToBar for Bar {
+    fn to_bar(&self) -> Bar {
+        *self
+    }
+}
+
+pub fn main() {
+    // With a vec of ints.
+    let f1 = Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
+    foo(&f1);
+    let f2 = &f1;
+    foo(f2);
+    let f3: &Fat<[isize]> = f2;
+    foo(f3);
+    let f4: &Fat<[isize]> = &f1;
+    foo(f4);
+    let f5: &Fat<[isize]> = &Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
+    foo(f5);
+
+    // With a vec of Bars.
+    let bar = Bar;
+    let f1 = Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
+    foo2(&f1);
+    let f2 = &f1;
+    foo2(f2);
+    let f3: &Fat<[Bar]> = f2;
+    foo2(f3);
+    let f4: &Fat<[Bar]> = &f1;
+    foo2(f4);
+    let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
+    foo2(f5);
+
+    // Assignment.
+    let f5: &mut Fat<[isize]> = &mut Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
+    f5.ptr[1] = 34;
+    assert_eq!(f5.ptr[0], 1);
+    assert_eq!(f5.ptr[1], 34);
+    assert_eq!(f5.ptr[2], 3);
+
+    // Zero size vec.
+    let f5: &Fat<[isize]> = &Fat { f1: 5, f2: "some str", ptr: [] };
+    assert!(f5.ptr.is_empty());
+    let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [] };
+    assert!(f5.ptr.is_empty());
+
+    // Deeply nested.
+    let f1 = Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3]} };
+    foo3(&f1);
+    let f2 = &f1;
+    foo3(f2);
+    let f3: &Fat<Fat<[isize]>> = f2;
+    foo3(f3);
+    let f4: &Fat<Fat<[isize]>> = &f1;
+    foo3(f4);
+    let f5: &Fat<Fat<[isize]>> =
+        &Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3]} };
+    foo3(f5);
+
+    // Box.
+    let f1 = Box::new([1, 2, 3]);
+    assert_eq!((*f1)[1], 2);
+    let f2: Box<[isize]> = f1;
+    assert_eq!((*f2)[1], 2);
+
+    // Nested Box.
+    let f1 : Box<Fat<[isize; 3]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
+    foo(&*f1);
+    let f2 : Box<Fat<[isize]>> = f1;
+    foo(&*f2);
+
+    let f3 : Box<Fat<[isize]>> =
+        Box::<Fat<[_; 3]>>::new(Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] });
+    foo(&*f3);
+}