On 07/10/2012 01:09 AM, Bardur Arantsson wrote:
On 07/09/2012 06:01 PM, Mikhail Vorozhtsov wrote:
On 07/09/2012 09:52 PM, Twan van Laarhoven wrote:
On 09/07/12 14:44, Simon Marlow wrote:
I now think '\' is too quiet to introduce a new layout context. The
pressing
need is really for a combination of '\' and 'case', that is
single-argument so
that we don't have to write parentheses. I think '\case' does the job
perfectly. If you want a multi-clause multi-argument function, then
give it a
name.
There is an advantage here for "\of" in favor of "\case", namely that
"of" already introduces layout, while "case" does not.
Do you think that adding "\" + "case" as a layout herald would
complicate the language spec and/or confuse users? Because it certainly
does not complicate the implementation (there is a patch for \case
already).
Just being anal here, but: The existence of a patch to implement X does
not mean that X doesn't complicate the implemenatation.
In general, yes. But that particular patch[1] uses ~20 lines of pretty
straightforward (if I'm allowed to say that about the code I wrote
myself) code to handle layout. Which in my book is not complex at all.
[1]
http://hackage.haskell.org/trac/ghc/attachment/ticket/4359/one-arg-lambda-case.patch
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