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24 lines
507 B
Rust
24 lines
507 B
Rust
// run-pass
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#![allow(dead_code)]
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trait Foo { fn f(&self) -> isize; }
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trait Bar : Foo { fn g(&self) -> isize; }
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trait Baz : Bar { fn h(&self) -> isize; }
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struct A { x: isize }
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impl Foo for A { fn f(&self) -> isize { 10 } }
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impl Bar for A { fn g(&self) -> isize { 20 } }
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impl Baz for A { fn h(&self) -> isize { 30 } }
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// Call a function on Foo, given a T: Baz,
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// which is inherited via Bar
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fn gg<T:Baz>(a: &T) -> isize {
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a.f()
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}
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pub fn main() {
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let a = &A { x: 3 };
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assert_eq!(gg(a), 10);
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}
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