I vote for tuple sections. Very nice! I don't really see immediate places where I would use the list comprehension improvement so I guess I don't vote for that.
2009/7/19 Neil Mitchell <ndmitch...@gmail.com>: > Hi Max, > >> For fun, I spent a few hours yesterday implement support for this >> syntax in GHC, originally propsed by Koen Claessen: >> >>>>> [k, "=", v, " " | (k, v) <- [("foo", "1"), ("bar", "2")] >> ["foo", "=", "1", " ", "bar", "=", "2", " "] >> >> This is a generalisation of list comprehensions that allows several >> items to be concatenated onto the result list at once, by having >> several comma-separated items before the pipe. > > I like the power this feature gives, and if it was already in Haskell > 98 I'd certainly have used it a few times. I can't think of anything > else the syntax could mean, so I don't see a potential for it stealing > syntax that might otherwise be reused. However, it doesn't seem that > discoverable or natural - I'm not sure I'd have ever guessed that such > a feature might exist. > >> P.S. I also implemented tuple sections >> (http://hackage.haskell.org/trac/ghc/ticket/3377#comment:3) which are >> a lot more useful: > > Yay! Discoverable, useful and really common in practice - a brilliant > extension :-) > > Thanks > > Neil > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe