Re: Call to arms: lambda-case is stuck and needs your help

Hello, I am late to the discussion and this is not entirely on topic, for which I apologize, but I like the multi-branch case syntax someone mentioned earlier: Writing:

case | p1 -> e1 | p2 -> e2 | ...

desugars to:

case () of _ | p1 -> e2 | p2 -> e2 | ...

-Iavor PS: I think it also makes sense to use "if" instead of "case" for this. Either way, I find myself writing these kind of cases quite often, so having the sugar would be nice. On Tue, Jul 10, 2012 at 8:55 AM, Chris Smith wrote:

On Tue, Jul 10, 2012 at 5:53 AM, Wolfgang Jeltsch wrote:

...

If we use \case for functions, we should use proc case for arrows; if we use \of for functions, we should use proc of for arrows.

By the way, is proc a layout herald already?

No, proc is not a layout herald. The normal pattern is to use a do in the command part of the proc syntax, so it's do that introduces the layout. So "proc of" would fit in cleanly as a way to do proc with multiple patterns. Or "proc case", but again that's just a really ugly language wart, IMO uglier than just writing out the longhand version of "proc x -> case x of".

-- Chris Smith

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