diff options
Diffstat (limited to 'tests/ui/traits/inheritance/cast-without-call-to-supertrait.rs')
-rw-r--r-- | tests/ui/traits/inheritance/cast-without-call-to-supertrait.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tests/ui/traits/inheritance/cast-without-call-to-supertrait.rs b/tests/ui/traits/inheritance/cast-without-call-to-supertrait.rs new file mode 100644 index 000000000..25159c1ad --- /dev/null +++ b/tests/ui/traits/inheritance/cast-without-call-to-supertrait.rs @@ -0,0 +1,33 @@ +// run-pass +#![allow(dead_code)] +// Testing that we can cast to a subtrait and call subtrait +// methods. Not testing supertrait methods + + +trait Foo { + fn f(&self) -> isize; +} + +trait Bar : Foo { + fn g(&self) -> isize; +} + +struct A { + x: isize +} + +impl Foo for A { + fn f(&self) -> isize { 10 } +} + +impl Bar for A { + fn g(&self) -> isize { 20 } +} + +pub fn main() { + let a = &A { x: 3 }; + let afoo = a as &dyn Foo; + let abar = a as &dyn Bar; + assert_eq!(afoo.f(), 10); + assert_eq!(abar.g(), 20); +} |