> Previously C-M-f jumped from "def" to "end":
>
> Yes, this is desired. The expression starts with "def" and the do -> end is
> just an argument to the "def" macro.
>
> def fun(a) do
> end
>
> The change is to jump only from "do" to "end" like in other ts-modes.
>
> Why is this better?
Because otherwise there is no easy way to navigate to the function name
and its arguments. There were many complaints that unlike smie-based sexp
now tree-sitter jumps too far directly to the end of functions.
So sadly an idealistic promise of tree-sitter doesn't fit perfectly
into the real world.
In Elixir
def foo(bar), do: bar
is pretty much the same as
(defun foo (bar) bar)
So I think the original implementation is more natural to Emacs users, and yes there is one slight downside, but at the cost of a multitude of improvements for navigation. The majority of users I got feedback from prefer how the new forward-sexp works. The smie-based sexp hardly worked in any expected way as well. Look at how ruby-mode works with navigation ( I have not tried ruby-ts-mode ), as it also properly treats def end blocks as sexps.
For many years I used elixir-mode before switching to elixir-ts-mode.
And it caused a minor disruption by the inability to move to the
function name and arguments as before in elixir-mode.
I understand that, but this is one case where it is slightly inconvenient, for any other block in elixir it is impossible to navigate around now.
> The one huge advantage that elixir-ts-mode brought to
> the table was to navigate between functions, the existing elixir-mode could
> not get this right.
The new command 'treesit-cycle-sexp-type' keeps this advantage
while allowing the users to toggle the traditional behavior
where C-M-f moves over the arguments.
How do I enable this? Is this a new setting? Will it make the navigation work as before?