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			21 lines
		
	
	
		
			356 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			21 lines
		
	
	
		
			356 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
| use std::fmt::Debug;
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| 
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| macro_rules! i {
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|     ($($tr:tt)*) => { impl $($tr)* };
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| }
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| 
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| fn foo(x: i!(Debug), y: i!(Debug)) -> String {
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|     let mut a = x;
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|     a = y; //~ ERROR mismatched
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|     format!("{:?}", a)
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| }
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| 
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| trait S<T> {}
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| 
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| fn much_universe<T: S<i!(Debug)>, U: IntoIterator<Item = i!(Iterator<Item = i!(Clone)>)>>(
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|     _: i!(Debug + Clone),
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| ) {
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| }
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| 
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| fn main() {}
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