#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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Changes (by simonmar):
* difficulty: => Unknown
Comment:
While I agree this would be very cool, it's very difficult to implement
and get right. In fact the only reasonable implementation I can think of
is to remove extensions one at a time and check whether the compilation
output was the same, but that ignores relationships between extensions
(e.g. it might be ok to remove both A and B, but not either A or B. I'm
not sure if we have any of those.)
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3085#comment:4>
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