bug#74378: [PATCH] Allow lambdas for 'flymake-cc-command'

[Eli Zaretskii]

> From: Pengji Zhang <me@pengjiz.com>
> Date: Sat, 16 Nov 2024 11:54:19 +0800
> 
> Currently the option 'flymake-cc-command' only takes a symbol that names
> a function, instead of all callable objects. I am not sure if that is an
> intentional design, but I think the alternative is more common and
> semantic. So I am proposing this patch to allow setting
> 'flymake-cc-command' to an unnamed lambda (and other callable objects).
> 
> Thank you!

Spencer, any comments?

> >From 53cc56749e8b396fefb7f430a1eb9e13aa4a25ee Mon Sep 17 00:00:00 2001
> From: Pengji Zhang <me@pengjiz.com>
> Date: Sat, 16 Nov 2024 11:26:41 +0800
> Subject: [PATCH] Allow lambdas for 'flymake-cc-command'
> 
> * lisp/progmodes/flymake-cc.el (flymake-cc-command): Use
> customization type 'function' instead of 'symbol' to allow other
> callable objects in addition to named functions, and update the
> doc string accordingly.
> (flymake-cc): Use 'functionp' to check if 'flymake-cc-command'
> is callable.
> ---
>  lisp/progmodes/flymake-cc.el | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/lisp/progmodes/flymake-cc.el b/lisp/progmodes/flymake-cc.el
> index 60e7da5d617..79557c9fbe4 100644
> --- a/lisp/progmodes/flymake-cc.el
> +++ b/lisp/progmodes/flymake-cc.el
> @@ -28,17 +28,17 @@
>  
>  (require 'cl-lib)
>  
> -(defcustom flymake-cc-command 'flymake-cc-use-special-make-target
> +(defcustom flymake-cc-command #'flymake-cc-use-special-make-target
>    "Command used by the `flymake-cc' backend.
> -A list of strings, or a symbol naming a function that produces one
> -such list when called with no arguments in the buffer where the
> -variable `flymake-mode' is active.
> +A list of strings, or a function that produces one such list when called
> +with no arguments in the buffer where the variable `flymake-mode' is
> +active.
>  
>  The command should invoke a GNU-style compiler that checks the
>  syntax of a (Obj)C(++) program passed to it via its standard
>  input and prints the result on its standard output."
>    :type '(choice
> -          (symbol :tag "Function")
> +          (function :tag "Function")
>            (repeat :tag "Command(s)" string))
>    :version "27.1"
>    :group 'flymake-cc)
> @@ -128,7 +128,7 @@ flymake-cc
>         (make-process
>          :name "gcc-flymake"
>          :buffer (generate-new-buffer "*gcc-flymake*")
> -        :command (if (symbolp flymake-cc-command)
> +        :command (if (functionp flymake-cc-command)
>                       (funcall flymake-cc-command)
>                     flymake-cc-command)
>          :noquery t :connection-type 'pipe
> -- 
> 2.47.0
>