#5572: factorial.hs:3:12: Parse error in pattern: n + 1
-------------------------+--------------------------------------------------
Reporter: francisco | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: GHCi | Version: 7.0.3
Resolution: invalid | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Linux
Blocking: | Architecture: x86
Failure: GHCi crash |
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Changes (by simonpj):
* status: new => closed
* resolution: => invalid
Comment:
Looks correct to me:
{{{
factorial (-1)
= (-1) * factorial (-2)
= (-1) * (-2) * factorial (-3)
= etc forever
}}}
I don't know why 6.10 would behave any differently.
Note that (n+k) patterns are no longer in Haskell. Use `-XNPlusKPatterns`
to get them back
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5572#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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