Hi Shen, > I got question about why haskell insist to be a purely FL. I mean is > there any feature which is only support by pure?
Laziness. It is very difficult to have a lazy language which is not pure. Laziness and purity together help with equational reasoning, compiler transformations, less obscure bugs, better compositionality etc. Thanks Neil _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe