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).
36 lines
452 B
Text
36 lines
452 B
Text
set_option pp.mvars false
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def f (x : Nat) := x + 1
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example : f x = x + 1 := rfl
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/--
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error: type mismatch
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rfl
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has type
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?_ = ?_
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but is expected to have type
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f x = x + 1
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-/
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#guard_msgs in
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seal f in
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example : f x = x + 1 := rfl
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example : f x = x + 1 := rfl
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seal f
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/--
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error: type mismatch
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rfl
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has type
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?_ = ?_
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but is expected to have type
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f x = x + 1
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-/
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#guard_msgs in
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example : f x = x + 1 := rfl
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unseal f
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example : f x = x + 1 := rfl
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