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29 lines
661 B
Rust
29 lines
661 B
Rust
//@ run-pass
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#![allow(dead_code)]
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// B and C both require A, so D does as well, twice, but that's just fine
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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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trait D: B + C { fn d(&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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impl D for S { fn d(&self) -> isize { 40 } }
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fn f<T:D>(x: &T) {
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assert_eq!(x.a(), 10);
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assert_eq!(x.b(), 20);
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assert_eq!(x.c(), 30);
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assert_eq!(x.d(), 40);
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}
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pub fn main() {
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let value = &S { bogus: () };
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f(value);
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}
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