On 07/04/2016 12:31 PM, Akio Takano wrote:
Hi glasgow-haskell-users,
I have written a wiki page about a proposed extension called ArgumentDo. It's a small syntactic extension that allows "do" expressions, lambdas and a few other kinds of expressions to be used as function arguments, without parentheses.
https://ghc.haskell.org/trac/ghc/wiki/ArgumentDo
Any feedback is appreciated. In particular, since the idea has received mixed support (see the "Discussion" section on the wiki page), I'd like to make sure that there is enough support for this feature to justify an implementation in GHC.
-1 Reasons have already been given in previous threads on this. However, I'd point especially to the fact that people don't *agree* that this is more readable as a very strong point against -- regardless of whether any one individual thinks it's more readable or not. The point is the there seems to be a lot of disagreement -- that indicates to me that this cannot by definition be a "clear win"[1]. Disclosure: I personally find it less readable because of the implicitness. Implicitness which has a non-trivial probability of affecting semantics is bad in my book. Frankly, if it came to it, I'd rather just remove $ and deal with the parentheses. Regards, [1] Which I should think the barrier to extensions should roughly be :).