[Haskell-cafe] Re: List comprehension desugaring

Neil Mitchell ndmitchell at gmail.com
Sun Aug 19 06:57:26 EDT 2007


Sorry for the noise, I've now realised they are a left to right
rewrite system, the second rule is required to set up the base case.



On 8/19/07, Neil Mitchell <ndmitchell at gmail.com> wrote:
> Hi,
> The Haskell desugaring for list comprehensions is given in:
> http://haskell.org/onlinereport/exps.html#list-comprehensions
> All the rules seem to be left to right rewrites, apart from the second
> one, which seems to be right to left. Is there some deep reason for
> this, or is this accidental.
> Thanks
> Neil

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