Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
3bd1dd633f
This PR causes Lean to search through `@[suggest_for]` annotations on certain errors that look like unknown identifiers that got incorrectly autobound. This will correctly identify that a declaration of type `Maybe String` should be `Option String` instead. ## Example ``` example : Except String Unit := return .ok () ``` ``` Function expected at Result but this term has type ?m.1 Note: Expected a function because this term is being applied to the argument String Hint: The identifier `Result` is unknown, and Lean's `autoImplicit` option causes an unknown identifier to be treated as an implicitly bound variable with an unknown type. However, the unknown type cannot be a function, and a function is what Lean expects here. This is often the result of a typo or a missing `import` or `open` statement. Perhaps you meant `Except` in place of `Result`? ``` The last line is added by this PR. |
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