List comprehensions

Rijk J. C. van Haaften rjchaaft@cs.uu.nl
Thu, 30 Jan 2003 11:41:49 +0100


Hello,

Recently, I came accross this
expression:
[ x + y | x <- xs | y <- ys ]

As far as I can see (Haskell Report),
this is not allowed by the haskell 98
standard. So I assume it to be an ex-
tension. Where can I find information
about this?

Thanks,

Rijk