[GHC] #8325: Pattern guards in anonymous functions
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Sat Jan 23 18:32:05 UTC 2016
#8325: Pattern guards in anonymous functions
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Reporter: mcollis | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.6.3
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
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Comment (by rwbarton):
One tricky case would be trying to write something like
{{{
f z
| odd z = \x y | x > y -> x
| otherwise -> y
| even z = \x y -> 0
}}}
The `| even z` guard has to be attached to `f` because it is followed by
`=`, but that requires some look-ahead.
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8325#comment:1>
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