Unused var tweaks #4088
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Unused var tweaks #4088
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rhendric
approved these changes
May 11, 2021
src/Language/PureScript/Linter.hs
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| removeAndWarn ss newNames (used, errors) = | ||
| let filteredUsed = used `S.difference` newNames | ||
| removeAndWarn :: SourceSpan -> S.Set (SourceSpan, Ident) -> (S.Set Ident, MultipleErrors) -> (S.Set Ident, MultipleErrors) | ||
| removeAndWarn _ newNamesWithSpans (used, errors) = |
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Because I have a short attention span?
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Oh there is so much noise floating around due to this :)
rhendric
approved these changes
May 12, 2021
src/Language/PureScript/Linter.hs
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| allExprs = concatMap unguard gexprs | ||
| in | ||
| removeAndWarn ss bindNewNames $ mconcat $ map (go ss) allExprs | ||
| removeAndWarn bindNewNames $ mconcat $ map (go) allExprs |
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Unneeded parens in (go). (I found four of these in total; they're easy to search for.)
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Oh dear, a little bit naive on the search and replace :)
src/Language/PureScript/Linter.hs
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| in removeAndWarn letNewNamesRec $ | ||
| mconcat (map underDecl ds) | ||
| <> removeAndWarn letNewNames (doElts rest v) | ||
| doElts (PositionedDoNotationElement _ _ e : rest) v = doElts (e : rest) v |
|
Oh sorry, would you add a CHANGELOG.md entry for this too? |
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Improvements to unused variable lint/warnings.
Fix a bad unused variable warning (fix #4083). The previous iteration was not distinguishing between variables bound recursively within the let binding, and those that are only bound inside the body.
Unchanged with this commit is that identifiers which are used recursively within a let binding will count as used (ie not warn), despite the fact that the binding could be removed - something more intelligent would be required to handle mutually recursive let blocks which may or may not be used externally.
Tighten the warning spans on unused variables (fix #4087).
This will scope to the identifier itself for binders, but a value declaration
let x = e in e2will scope to the entirex = easValueDecldoes not have a source span for the identifier alone.Checklist: