bug#60025: [PATCH] Add go-ts-mode and go-mod-ts-mode

[Theodor Thornhill via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Randy Taylor <dev@rjt.dev> writes:

> On Wednesday, December 14th, 2022 at 16:27, Theodor Thornhill <theo@thornhill.no> wrote:
>> 
>> Yeah, I seem to remember seeing these \n nodes in the go-mode I made
>> some time ago. There is no node there, so no-node is the rule that
>> matches, as there is no parent. I believe you can solve it with
>> something like
>> 
>> 
>> (defun go-backward-up-list ()
>> (lambda (node parent bol &rest _)
>> (save-excursion
>> (backward-up-list 1 nil t)
>> (back-to-indentation)
>> (point))))
>> 
>> and use some variant of that. Now you can find a different node without
>> relying on there being a node where you start.
>
> Thanks Theo, that worked perfectly. We should consider adding
> something like this to the documentation somewhere, since I didn't see
> anything like this anywhere (although maybe I missed it).

I'm glad!  Could be part of a tips and tricks or something?

[...]

> +(defvar go-ts-mode--indent-rules
> +  `((go
> +     ((node-is ")") parent-bol 0)
> +     ((node-is "]") parent-bol 0)
> +     ((node-is "}") parent-bol 0)
> +     ((node-is "labeled_statement") no-indent)
> +     ((parent-is "argument_list") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "block") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "const_declaration") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "default_case") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "expression_case") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "expression_switch_statement") parent-bol 0)
> +     ((parent-is "field_declaration_list") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "import_spec_list") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "labeled_statement") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "literal_value") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "type_spec") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "var_declaration") parent-bol go-ts-mode-indent-offset)
> +     (no-node parent-bol 0)))
> +  "Tree-sitter indent rules for `go-ts-mode'.")

No rules for comment?

[...]

> +;; go.mod support.
> +
> +(defvar go-mod-ts-mode--syntax-table
> +  (let ((table (make-syntax-table)))
> +    (modify-syntax-entry ?/   ". 124b" table)
> +    (modify-syntax-entry ?\n  "> b"    table)
> +    table)
> +  "Syntax table for `go-mod-ts-mode'.")
> +
> +(defvar go-mod-ts-mode--indent-rules
> +  `((gomod
> +     ((node-is ")") parent-bol 0)
> +     ((parent-is "exclude_directive") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "module_directive") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "replace_directive") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "require_directive") parent-bol go-ts-mode-indent-offset)
> +     ((parent-is "retract_directive") parent-bol go-ts-mode-indent-offset)
> +     ((go-mod-ts-mode--in-directive-p) no-indent go-ts-mode-indent-offset)
> +     (no-node no-indent 0)))
> +  "Tree-sitter indent rules for `go-mod-ts-mode'.")

No rules for comment here either?

Theo