Re: [PATCH] refs: forbid clang to complain about unreachable code

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Oct 10, 2025, 13:49 UTC
Message-ID: <2346bcc7-b60e-0ad6-14fe-c0b49e427921@gmx.de>
In-Reply-To: <aOia55_sjFQjw1UQ@pks.im>

Hi Patrick,

On Fri, 10 Oct 2025, Patrick Steinhardt wrote:

Show 13 quoted lines

> diff --git a/refs/files-backend.c b/refs/files-backend.c
> index bb2bec3807..cb402a2a54 100644
> --- a/refs/files-backend.c
> +++ b/refs/files-backend.c
> @@ -2115,7 +2115,7 @@ static int commit_ref_update(struct files_ref_store *refs,
>  }
>  
>  #ifdef NO_SYMLINK_HEAD
> -#define create_ref_symlink(a, b) (-1)
> +#define create_ref_symlink(a, b) NOT_CONSTANT(-1)
>  #else
>  static int create_ref_symlink(struct ref_lock *lock, const char *target)
>  {

While this is correct, and "closer to the root", in my experience it is better to have work-arounds closer to where the symptom appears. In this case, it would be directly in the condition of the `if ()` construct. Therefore, I would prefer to keep the proposed patch as-is.

Ciao, Johannes