fb462fdf9e
This PR adds improves the "invalid named argument" error message in function applications and match patterns by providing clickable hints with valid argument names. In so doing, it also fixes an issue where this error message would erroneously flag valid match-pattern argument names.
68 lines
1.6 KiB
Text
68 lines
1.6 KiB
Text
/-!
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# Invalid named arguments in patterns
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This test assesses hints in error messages for invalid argument names in patterns.
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-/
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inductive T where
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| mk1 (num : Nat) (str : String)
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| mk2 (x y z : Bool)
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/--
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error: Invalid argument name `w` for function `T.mk2`
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Hint: Perhaps you meant one of the following parameter names:
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• `x`: w̵x̲
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-/
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#guard_msgs in
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example (t : T) :=
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match t with
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| .mk2 (y := true) (w := true) (z := false) => ()
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| _ => ()
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/--
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error: Invalid argument name `w` for function `T.mk2`
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Hint: Replace `w` with one of the following parameter names:
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• `x`: w̵x̲
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-/
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#guard_msgs in
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example (t : T) :=
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match t with
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| T.mk2 (y := true) (w := true) (z := false) => ()
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| _ => ()
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/-- error: Invalid pattern: Too many arguments to 'T.mk2'; expected 3 explicit arguments -/
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#guard_msgs in
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example (t : T) :=
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match t with
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| T.mk2 a b (y := true) (z := false) (w := true) => ()
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| _ => ()
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/--
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error: Invalid argument names `n` and `s` for function `T.mk1`
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Hint: Replace `n` with one of the following parameter names:
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• `num`: nu̲m̲
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• `str`: n̵s̲t̲r̲
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-/
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#guard_msgs in
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example (t : T) :=
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match t with
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| T.mk1 (n := 17) (s := "hi") => ()
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| _ => ()
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-- Ensure we don't offer hints for synthetic syntax:
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macro "make_synthetic_bad_match" : command => `(
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example (t : T) :=
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match t with
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| T.mk1 (m := 0) (n := 1) .. => ()
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| _ => ()
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)
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/--
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error: Invalid argument names `m` and `n` for function `T.mk1✝`
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Hint: Perhaps you meant one of the following parameter names: `num` or `str`
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-/
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#guard_msgs in
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make_synthetic_bad_match
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