[Haskell-cafe] GHC Extension Proposal: ArgumentBlock
tom-lists-haskell-cafe-2013 at jaguarpaw.co.uk
Sun Sep 6 12:53:04 UTC 2015
On Sat, Sep 05, 2015 at 03:55:37PM -0700, Andrew Gibiansky wrote:
> I'd like to propose a GHC extension called (for now) `ArgumentBody`.
> `ArgumentBody` is a simple syntax extension, than, when enabled, permits
> the following code:
> main = when True do
> putStrLn "Hello!"
> main = forM values \value ->
> print value
> main = forM values \case
> Just x -> print x
> Nothing -> print y
By the way, you can already do
main = when True (do
main = forM values (\value ->
main = forM values (\case
Just x -> print x
Nothing -> print y)
which gets you a lot of the way, and is arguably even clearer. This is as
style that has been promoted by Chris Done.
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