bug#66224: [PATCH] Add optional PREDICATE argument to read-directory-name

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 26 Sep 2023 18:16:40 -0700
> From:  Joseph Turner via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> This patch makes read-directory-name accept an optional PREDICATE arg
> so it can be used like read-file-name.

Any rationale?

> @@ -1719,7 +1719,9 @@ combining @var{directory} (or the current buffer's default directory
>  if @var{directory} is @code{nil}) and @var{initial}.  If both
>  @var{default} and @var{initial} are @code{nil}, this function uses
>  @var{directory} as substitute default, or the current buffer's default
> -directory if @var{directory} is @code{nil}.
> +directory if @var{directory} is @code{nil}.  The union of sixth arg
> +@code{predicate} and @code{file-directory-p} is passed as the

This should be elaborated: what is meant by "the union of sixth arg
and 'file-directory-p'"?

> +@code{predicate} argument to ‘read-file-name’.
                                ^^^^^^^^^^^^^^^^
That should be @code{read-file-name}

> +** 'read-directory-name' now accepts an optional PREDICATE argument.
> +The union of sixth arg PREDICATE and 'file-directory-p' is passed
> +as the PREDICATE argument to 'read-file-name'.

Likewise here, regarding the "union" part.

Also, since you submit the patch for the manual, this NEWS entry
should be marked with "+++".

>  Fifth arg INITIAL specifies text to start with.
>  DIR should be an absolute directory name.  It defaults to
> -the value of `default-directory'."
> +the value of `default-directory'.
> +The union of sixth arg PREDICATE and `file-directory-p' is passed
> +as the PREDICATE argument to `read-file-name'."

The "union" part again.

Thanks.