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Every hiding error forgot that instance arguments exist #101

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opened 2026年05月15日 18:02:40 +02:00 by amyliao · 1 comment
foo:SetSetfoo⦃x⦄=x-- error: [WrongHidingInLHS]-- Unexpected implicit argument-- ^~~~~~~~~~~~~~~~~ really!?
bar:SetSetbar=λ⦃x⦄x-- error: [WrongHidingInLambda]-- Found an implicit lambda where an explicit lambda was expected-- ^~~~~~~~~~~~~~~~~~~~~~~~ oh did you?
baz:(SetSet)SetSetbazfg=f⦃g⦄-- error: [WrongHidingInApplication]-- Found an implicit application where an explicit application was-- ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ yeah? tell me more!-- expected

The fix here is to record both the expected and actual hidings, and report them with verbalize.

```agda foo : Set → Set foo ⦃ x ⦄ = x -- error: [WrongHidingInLHS] -- Unexpected implicit argument -- ^~~~~~~~~~~~~~~~~ really!? ``` ```agda bar : Set → Set bar = λ ⦃ x ⦄ → x -- error: [WrongHidingInLambda] -- Found an implicit lambda where an explicit lambda was expected -- ^~~~~~~~~~~~~~~~~~~~~~~~ oh did you? ``` ```agda baz : (Set → Set) → Set → Set baz f g = f ⦃ g ⦄ -- error: [WrongHidingInApplication] -- Found an implicit application where an explicit application was -- ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ yeah? tell me more! -- expected ``` The fix here is to record both the expected and actual hidings, and report them with `verbalize`.
amyliao changed title from (削除) WrongHidingInLHS, WrongHidingInLambda, WrongHidingInApplication all forgot that instance arguments exist (削除ここまで) to Every hiding error forgot that instance arguments exist 2026年05月15日 18:07:25 +02:00
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I'm just gonna make the title super generic because:

foo=quoteTerm⦃foo⦄-- error: [CannotQuoteTerm.Hidden]-- `quoteTerm' expects a single visible argument,-- but has been given an implicit one-- ^~~~~~~~~~~~~~~~~~~~~ I don't see it! Please point it out!
foo=quote⦃foo⦄-- error: [CannotQuote.Hidden]-- `quote' expects an unambiguous defined name,-- but here the argument is implicit-- ^~~~~~~~~~~~~~~~~~~~~~~~ oh my god
I'm just gonna make the title super generic because: ```agda foo = quoteTerm ⦃ foo ⦄ -- error: [CannotQuoteTerm.Hidden] -- `quoteTerm' expects a single visible argument, -- but has been given an implicit one -- ^~~~~~~~~~~~~~~~~~~~~ I don't see it! Please point it out! ``` ```agda foo = quote ⦃ foo ⦄ -- error: [CannotQuote.Hidden] -- `quote' expects an unambiguous defined name, -- but here the argument is implicit -- ^~~~~~~~~~~~~~~~~~~~~~~~ oh my god ```
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