Arrows in type signatures don't align under ::

[tibbe]

I'd prefer if arrows aligned under the :: in type signatures, like so:

f :: a
  -> b

Right now we get

f :: a
    -> b

I don't know how much extra time I spend realigning things when coding. Perhaps this could be made an option if everyone can't agree on the style here?

[hvr]

I'd just like to mention, that the indenting should also be adapted (if there needs to be done anything special) for the respective 1-character-wide UnicodeSyntax tokens, i.e.

f ∷ a
  → b

[chrisdone]

Surely this depends on the indentation mode? In my indentation mode if I indent -> it goes to under the ::. The ticket should specify which indentation mode.

[tibbe]

@chrisdone I just went and checked what I use:

(add-hook 'haskell-mode-hook 'turn-on-haskell-indentation)

[pheaver]

So there are three indentation files to choose from:

haskell-indentation.el, activated by turn-on-haskell-indentation
haskell-simple-indent.el, activated by turn-on-haskell-simple-indent
haskell-indent.el, activated by turn-on-haskell-indent

I've tried all three, and verified that the first one doesn't indent the way you want, but the other two do.

[chrisdone]

I've tried all three, and verified that the first one doesn't indent the way you want, but the other two do.

I believe he wants his choice of indentation module to behave in this case like the rest. So the resolution for this issue would be to patch that module unless tibbe wants to stop using this one just for this reason.

FWIW I have no intention of hacking on these indentation modes, I use haskell-simple-indent.el which I will maintain but the others are messes beyond my interest.

[hvr]

Actually, I think @tibbe just wants something that can be tweaked to adhere to https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md... but on the other hand, Johan should just speak up for himself as to what he really wants... :-)

@chrisdone, btw will your haskell-simple-indent be flexible enough, in order to "emulate" (given appropriate configuration) the "legacy" indentation modes' styles, so that it may make those "legacy" modes redundant?

[chrisdone]

@hvr

haskell-simple-indent isn't mine.

It doesn't do all that the other more advanced modes do. It is very simple. It is very predictable, that's why I like it. It does the same thing every time, goes forward (tab) or backwards (S-tab) on the columns defined by previous lines. It isn't for everyone. The other tab cycle modes annoy me and distract me from coding. Most people seem to like them though. I'm just clearing up that I haven't used them for years nor do I intend do, and so I have no interest in trying to solve issues related to them. Just in case any of the other maintainers thought I might be picking tickets like this up. :-)

[ivan-m]

Was this made optional? I actually prefer having the arrows indented relative to the ::.