38 lines
697 B
Rust
38 lines
697 B
Rust
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// run-pass
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trait Foo<T: Default + ToString>: Bar<i32> + Bar<T> {}
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trait Bar<T: Default + ToString> {
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fn bar(&self) -> String {
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T::default().to_string()
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}
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}
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struct S1;
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impl Bar<i32> for S1 {}
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impl Foo<i32> for S1 {}
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struct S2;
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impl Bar<i32> for S2 {}
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impl Bar<bool> for S2 {}
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impl Foo<bool> for S2 {}
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fn test1(x: &dyn Foo<i32>) {
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let s = x as &dyn Bar<i32>;
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assert_eq!("0", &s.bar().to_string());
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}
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fn test2(x: &dyn Foo<bool>) {
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let p = x as &dyn Bar<i32>;
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assert_eq!("0", &p.bar().to_string());
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let q = x as &dyn Bar<bool>;
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assert_eq!("false", &q.bar().to_string());
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}
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fn main() {
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let s1 = S1;
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test1(&s1);
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let s2 = S2;
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test2(&s2);
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}
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