NondecreasingIndentation (& de-tabbing several .hs files)

[Simon Marlow]

On 29/05/2014 10:35, Herbert Valerio Riedel wrote:
> On 2014-05-29 at 09:17:58 +0200, Simon Marlow wrote:
>>> While I refactored the ghc code base to declare LANGUAGE pragmas
>>> locally, rather than via -X-flags on the GHC commandline, I've noticed
>>> there were a couple of places where NondecreasingIndentation grammar was used.
>>>
>>> What's the current consensus on the use of NondecreasingIndentation? Is
>>> its use still encouraged?
>>
>> I like it for things like
>>
>>     do
>>       ...
>>       if exit_early then return () else do
>>       ... more  stuff ...
>>
>> Without NondecreasingIndentation this creeps to the right, which isn't
>> a good use of whitespace.
>
> I see, so NondecreasingIndentation is mostly used to simulate
> early-returns?

I suspect that's what I mostly use it for.  Simon PJ likes braces and 
semicolons instead :-)

It's not a big deal, but I don't see a strong argument for getting rid 
of it either.

Cheers,
Simon