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			21 lines
		
	
	
		
			671 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
			
		
		
	
	
			21 lines
		
	
	
		
			671 B
		
	
	
	
		
			Plaintext
		
	
	
	
	
	
error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
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  --> $DIR/parameter-defaults.rs:10:12
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LL | const NONE<T = ()>: Option<T> = None::<T>;
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   |            ^^^^^^
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error[E0282]: type annotations needed for `Option<T>`
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  --> $DIR/parameter-defaults.rs:13:9
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LL |     let _ = NONE;
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   |         ^   ---- type must be known at this point
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help: consider giving this pattern a type, where the type for type parameter `T` is specified
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LL |     let _: Option<T> = NONE;
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   |          +++++++++++
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0282`.
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