#3085: warn about language extensions that are not used
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Reporter: PVerswyvelen | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.1
Severity: normal | Resolution:
Keywords: warnings extensions language | Difficulty: Unknown
Testcase: | Os: Unknown/Multiple
Architecture: Unknown/Multiple |
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Comment (by simonpj):
For the most part, the fact that GHC ''consults'' a flag is enough to
indicate that changing its state would affect compilation. (That's not
quite true -- in some places we read flags and pass on a couple of
booleans that may or may not be needed -- but it is largely true.)
So while it's not entirely trivial, I suspect we could get close to what
you want, at least for the language extensions. If someone wants to
volunteer to do this, I can advise. Unless I'm missing something.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3085#comment:5>
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