[Discussion] haskell-indentation, reset indentation after newline

[meditans]

It would be a feature if there was a option to reset indentation to the first column after an empty line in haskell-indentation, similarly to what is done in haskell-indent.

[gracjan]

Note that haskell-indent-mode does not reset to first line after second newline.

[gracjan]

It seems it never did. I'm not sure what is asked in this issue in this case. There is always C-a available when needed.

[meditans]

Sorry @gracjan, I somehow missed your responses on this issue. Let's do an example to understand the problem. I have the code:

bar :: Int -> Int
bar i = i + 2|

when I hit newline, the position of my cursor will be (quite correctly):

bar :: Int -> Int
bar i = i + 2
  |

However, if I hit newline again, the position of the cursor will be:

bar :: Int -> Int
bar i = i + 2

  |

what I'm saying here is that this way of indenting after the first blank line feels strange to me: I usually want to start a new definition. A most ergonomic solution, in my opinion, is to reset the indentation after a blank line.

Here's how I set my local config to do that:

(defun haskell-indentation-advice ()
  (when (and (< 1 (line-number-at-pos))
             (save-excursion
               (forward-line -1)
               (string= "" (s-trim (buffer-substring (line-beginning-position) (line-end-position))))))
    (delete-region (line-beginning-position) (point))))

(advice-add 'haskell-indentation-newline-and-indent
            :after 'haskell-indentation-advice)

I still believe, though, that this should be the default behaviour. What do you think?

[geraldus]

@meditans such behaviour looks right to me.