Re: c++-ts-mode and namespace indentation

[Yuan Fu <casouri@gmail.com>]

> On Sep 6, 2023, at 8:37 AM, xzhou@xeechou.net xzhou@xeechou.net <xzhou@xeechou.net> wrote:
> 
>> Date: Thu, 24 Aug 2023 09:04:55 +0000
>> From: Louis-Guillaume Gagnon <gagnonlg@protonmail.com>
>> 
>> I've recently switched to the new c++-ts-mode (a game changer for source
>> code featuring deeply nested templates!). I'm quite pleased with it, but
>> I can't figure out how to make it such that a namespace block doesn't
>> increase the indentation level.  I previously achieved this with
>> (c-set-offset 'innamespace 0); Can anyone spell out how to achieve this
>> under treesitter?
> 
> Hi,
> 
> 
> I managed to create an simple function to archive the same goal
> 
>  (defun my/indent-rules ()
>    `(;;here is my custom rules
>      ((parent-is "namespace_definition") parent-bol 0)
>      ,@(alist-get 'bsd (c-ts-mode--indent-styles 'cpp)))
>    )
> 
> 
> Then you would simply (setq c-ts-mode-indent-style #'my-indent-style). I 
> followed some guides here: https://casouri.github.io/note/2023/tree-sitter-starter-guide/html-manual/Parser_002dbased-Indentation.html.

An alternative that avoids using c-ts-mode--indent-styles:

(defun c++-ts-mode-config ()
  (push '((parent-is "namespace_definition") parent-bol 0)
        treesit-simple-indent-rules))

(add-hook 'c++-ts-mode-hook #'c++-ts-mode-config)

Yuan