Yes, the spaces are necessary. This is because of the maximal munch rule; it assumes that '->\' is an identifier. In fact, you can define it as such: Prelude> let (->\) a b = a + b Prelude> 5 ->\ 6 11 Prelude> You can of course write Prelude> let f = \x y z -> x (map (+y) z) if you wish. -- Hal Daume III "Computer science is no more about computers | hdaume@isi.edu than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume On Wed, 16 Oct 2002, Bryn Keller wrote:
Prelude> let f = \x->\y->\z->x (map (+ y) z) <interactive>:1: parse error on input `->\' Prelude> let f = \x-> \y-> \z-> x (map (+ y) z) Prelude>
Are the spaces really necessary, or is this a bug?
Thanks,
Bryn
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