mirror of https://github.com/rust-lang/rust
34 lines
522 B
Rust
34 lines
522 B
Rust
//@ run-pass
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#![allow(dead_code)]
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// Testing that supertrait methods can be called on subtrait object types
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trait Foo {
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fn f(&self) -> isize;
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}
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trait Bar : Foo {
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fn g(&self) -> isize;
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}
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struct A {
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x: isize
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}
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impl Foo for A {
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fn f(&self) -> isize { 10 }
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}
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impl Bar for A {
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fn g(&self) -> isize { 20 }
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}
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pub fn main() {
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let a = &A { x: 3 };
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let afoo = a as &dyn Foo;
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let abar = a as &dyn Bar;
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assert_eq!(afoo.f(), 10);
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assert_eq!(abar.g(), 20);
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assert_eq!(abar.f(), 10);
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}
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