27 lines
603 B
Rust
27 lines
603 B
Rust
//@ run-pass
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#![allow(dead_code)]
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trait A { fn a(&self) -> isize; }
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trait B: A { fn b(&self) -> isize; }
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trait C: A { fn c(&self) -> isize; }
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struct S { bogus: () }
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impl A for S { fn a(&self) -> isize { 10 } }
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impl B for S { fn b(&self) -> isize { 20 } }
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impl C for S { fn c(&self) -> isize { 30 } }
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// Multiple type params, multiple levels of inheritance
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fn f<X:A,Y:B,Z:C>(x: &X, y: &Y, z: &Z) {
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assert_eq!(x.a(), 10);
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assert_eq!(y.a(), 10);
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assert_eq!(y.b(), 20);
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assert_eq!(z.a(), 10);
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assert_eq!(z.c(), 30);
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}
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pub fn main() {
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let s = &S { bogus: () };
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f(s, s, s);
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}
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