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			25 lines
		
	
	
		
			314 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			25 lines
		
	
	
		
			314 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
//@ check-pass
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#![feature(specialization)]
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#![allow(incomplete_features)]
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pub trait Foo {
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    fn bar(&self) -> impl Sized;
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}
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impl<U> Foo for U
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where
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    U: Copy,
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{
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    #[expect(refining_impl_trait)]
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    fn bar(&self) -> U {
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        *self
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    }
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}
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impl Foo for i32 {}
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fn main() {
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    let _: i32 = 1i32.bar();
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}
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