#3919: Or-patterns as GHC extension
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Reporter: BjornEdstrom | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version:
Keywords: | Difficulty:
Os: Unknown/Multiple | Testcase:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Changes (by aavogt):
* cc: vogt.a...@… (added)
Comment:
Hello.
Please see attached preliminary quasiquoter. It doesn't work because TH
can't represent ViewPatterns.
It probably does the right thing that each option binds the same
variables, though variables in any Exp (with -XViewPatterns) would have to
be ignored.
Maybe this isn't an efficient approach since repeated patterns may not be
shared? Keep in mind that I'm not familiar with how 'or' patterns can be
compiled.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3919#comment:2>
GHC <http://www.haskell.org/ghc/>
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