8424ddbb3e
This PR improves the “expected type mismatch” error message by omitting the type's types when they are defeq, and putting them into separate lines when not. I found it rather tediuos to parse the error message when the expected type is long, because I had to find the `:` in the middle of a large expression somewhere. Also, when both are of sort `Prop` or `Type` it doesn't add much value to print the sort (and it’s only one hover away anyways).
29 lines
513 B
Text
29 lines
513 B
Text
/-!
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# Improved `simpa` error messages
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Updated error message to show the elaborated term rather than `h✝`
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-/
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/--
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error: type mismatch, term
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hp
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after simplification has type
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p
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but is expected to have type
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p ∧ q
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-/
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#guard_msgs in
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example (p q : Prop) (hp : p ∧ True) : p ∧ q ∧ True := by
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simpa using hp
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/--
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error: type mismatch, term
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fun x => x
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after simplification has type
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True
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but is expected to have type
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False
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-/
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#guard_msgs in
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example : False := by
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simpa using (fun x : True => x)
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