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).
6 lines
139 B
Text
6 lines
139 B
Text
etaStructIssue.lean:20:2-20:7: error: type mismatch
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rfl
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has type
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?m = ?m
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but is expected to have type
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mkNat e x₁ = mkNat e.mk x₂
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