#3263: Warnings for monadic values not used
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Reporter: NeilMitchell | Owner: igloo
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.2
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Os: Unknown/Multiple
Architecture: Unknown/Multiple |
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Changes (by igloo):
* owner: => igloo
Comment:
Re:
{{{
evaluate -- Returns the thing on the input. Perhaps we should provide
force :: a -> IO () as an alternative
}}}
I think that actually you are meant to use the returned value rather than
the input value, as otherwise inlining can defeat the purpose of the
forcing. See #2273 for more.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3263#comment:8>
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