#4282: Data.List.intersperse not lazy enough
---------------------------------------------------+------------------------
Reporter: daniel.is.fischer | Owner:
Type: proposal | Status: new
Priority: normal | Milestone:
Component: libraries/base | Version: 6.12.3
Keywords: intersperse, laziness, intercalate | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Other
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Changes (by daniel.is.fischer):
* keywords: intersperse, laziness => intersperse, laziness, intercalate
Comment:
I've forgotten to explicitly mention that this change would also change
the behaviour of intercalate from
{{{
intercalate sep (xs : _|_) = _|_
}}}
to
{{{
intercalate sep (xs : _|_) = xs ++ _|_
}}}
which I also deem desirable and hence include in the proposal.
Thanks to Duncan for pointing out the omission.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4282#comment:7>
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