[Haskell-cafe] List comprehension desugaring

[Neil Mitchell]

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