beginning-of-defun-function and end-of-defun-function go too far

[gracjan]

beginning-of-defun-function should put cursor in column 0 where the definition begins (currently it puts it at the end of line the line before).

end-of-defun-function should put cursor in column 0 after last line of the definition (currently it can go many empty lines below it).

[gracjan]

And those two functions are active only when haskell-decl-scan-mode is active so referencing #623 seems in order. Those should work in plain haskell-mode.

[gracjan]

Related: #1122.

[gracjan]

beginning-of-defun-function should be same functionality as in haskell-indentation-mode, so it is part of common functionality.

[gracjan]

Spec:

• beginning-of-defun-function should move up to the beginning of line that: 1) starts in the first column (for normal haskell) 2) starts in the 3rd column after bird (in literate) 3) is not in string 4) is not in comment 5) is not in quasiquote 6) is not in any parenthesized expression
• end-of-defun-function should move down to the beginning of line that: 1) is right after newline past last line with non-comment tokens 2) is not in string, comment, quasiquote or any parenthesized expression

[gracjan]

beginning-of-defun is implemented in haskell-indentation-mode as haskell-indentation-goto-least-indentation. This should be put up higher level, presumably in haskell-mode.

[gracjan]

And take those two functions out of haskell-decl-scan.

[czipperz]

I believe this is already working?

[czipperz]

On a semi-related issue, I made haskell-ds-backward-decl and haskell-ds-forward-decl work correctly with operators. Is it OK to bind these to C-M-a and C-M-e, as they implement that functionality correctly, but the beginning-of-defun and end-of-defun functions don't work correctly with it.

[gracjan]

The point is to make those functions available without enabling haskell-decl-scan-mode.