bug#70345: [PATCH] 29.1.50; csharp-ts-mode indentation of if statements with single-statement body

[Jacob Leeming]

> Theodor Thornhill <theo@thornhill.no> writes:

>> Hi all,
>>
>
> Hi, Jacob!
>
>>>From emacs -Q:
>>
>> Evaluate this elisp to set up treesitter for csharp:
>>
>> (setq treesit-language-source-alist '((c-sharp
>> "https://github.com/tree-sitter/tree-sitter-c-sharp"; "master" "src"))
>>       treesit-load-name-override-list '((c-sharp
>> "libtree-sitter-csharp" "tree_sitter_c_sharp"))
>>       major-mode-remap-alist '((csharp-mode . csharp-ts-mode)))
>>
>> Insert the following text into a csharp-ts-mode buffer:
>>
>> if (true)
>> var x = 2;
>>
>> Try to indent the variable declaration of the function with
>> indent-for-tab-command. Nothing will happen. I'd expect to see this:
>>
>> if (true)
>>     var x = 2;
>>
>> This issue can be fixed with the following patch:
>>
>> diff --git a/lisp/progmodes/csharp-mode.el b/lisp/progmodes/csharp-mode.el
>> index 53c52e6..1a7d535 100644
>> --- a/lisp/progmodes/csharp-mode.el
>> +++ b/lisp/progmodes/csharp-mode.el
>> @@ -678,7 +678,8 @@ csharp-ts-mode--indent-rules
>>       ((parent-is "binary_expression") parent 0)
>>       ((parent-is "block") parent-bol csharp-ts-mode-indent-offset)
>>       ((parent-is "local_function_statement") parent-bol 0)
>> -     ((parent-is "if_statement") parent-bol 0)
>> +     ((match "block" "if_statement") parent-bol 0)
>> +     ((parent-is "if_statement") parent-bol csharp-ts-mode-indent-offset)
>>       ((parent-is "for_statement") parent-bol 0)
>>       ((parent-is "for_each_statement") parent-bol 0)
>>       ((parent-is "while_statement") parent-bol 0)
>>
>
> Looks good to me. Are you willing to pack this up with a nice test
> confirming the behavior?
>
> All the best,
> Theo

Thanks all,

Discovered we had a similar issue for else blocks. Wrote a test that
covers both cases.

See the attached diff which contains my changes to the indent rules and
the test.

Cheers,
Jacob

0001-indent-single-statement-if-in-csharp-ts-mode.patch
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