#3380: [Patch] Support implicit concatenation in list comprehensions
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Reporter: batterseapower | Owner:
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.4
Severity: normal | Resolution:
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Comment (by batterseapower):
NB: this generalises to instances of MonadPlus, but I can't think of a
nice-looking syntax.
{{{
[e1, e2 | qs]
= concat [[e1, e2] | qs]
= join [return e1 `mplus` return e2 | qs]
}}}
This is pretty easy to implement as long as you can come up with the
syntax.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3380#comment:2>
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