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rust/tests/ui/traits/coercion-generic.rs

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//@ run-pass
#![allow(dead_code)]
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trait Trait<T> {
fn f(&self, x: T);
}
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#[derive(Copy, Clone)]
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struct Struct {
x: isize,
y: isize,
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}
impl Trait<&'static str> for Struct {
fn f(&self, x: &'static str) {
println!("Hi, {}!", x);
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}
}
pub fn main() {
let a = Struct { x: 1, y: 2 };
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let b: Box<dyn Trait<&'static str>> = Box::new(a);
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b.f("Mary");
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let c: &dyn Trait<&'static str> = &a;
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c.f("Joe");
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}