directory-files called with empty string

directory-files called with empty string

[Thierry Volpiatto]

Hi all,
is it the normal behavior of directory-files to use default-directory
when it is called with empty string or is it a bug?

actually with emacs -Q:

(directory-files "")

return the content of default-directory.

-- 
A + Thierry Volpiatto
Location: Saint-Cyr-Sur-Mer - France

Re: directory-files called with empty string

[Andreas Schwab]

Thierry Volpiatto <thierry.volpiatto@gmail.com> writes:

> is it the normal behavior of directory-files to use default-directory
> when it is called with empty string or is it a bug?

That is the normal behviour of every file related function.  It is
basically what expand-file-name defines.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: directory-files called with empty string

[Stefan Monnier]

>> is it the normal behavior of directory-files to use default-directory
>> when it is called with empty string or is it a bug?
> That is the normal behviour of every file related function.  It is
> basically what expand-file-name defines.

Indeed, although I don't think it's documented, and code had probably
better not rely on it.


        Stefan

Re: directory-files called with empty string

[Thierry Volpiatto]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>> is it the normal behavior of directory-files to use default-directory
>>> when it is called with empty string or is it a bug?
>> That is the normal behviour of every file related function.  It is
>> basically what expand-file-name defines.
>
> Indeed, although I don't think it's documented, and code had probably
> better not rely on it.

Ok i see, thank you Stefan and Andreas, maybe that should be documented, for
all file related functions.

-- 
A + Thierry Volpiatto
Location: Saint-Cyr-Sur-Mer - France

Re: directory-files called with empty string

[Stefan Monnier]

>>>> is it the normal behavior of directory-files to use default-directory
>>>> when it is called with empty string or is it a bug?
>>> That is the normal behviour of every file related function.  It is
>>> basically what expand-file-name defines.
>> Indeed, although I don't think it's documented, and code had probably
>> better not rely on it.
> Ok i see, thank you Stefan and Andreas, maybe that should be documented, for
> all file related functions.

I prefer to keep features which are accidental undocumented, unless we
really consider them as good features (even if we bumped into them by
accident), in which case they can be documented and their use can
be blessed.


        Stefan

Re: directory-files called with empty string

[Thierry Volpiatto]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>>>> is it the normal behavior of directory-files to use default-directory
>>>>> when it is called with empty string or is it a bug?
>>>> That is the normal behviour of every file related function.  It is
>>>> basically what expand-file-name defines.
>>> Indeed, although I don't think it's documented, and code had probably
>>> better not rely on it.
>> Ok i see, thank you Stefan and Andreas, maybe that should be documented, for
>> all file related functions.
>
> I prefer to keep features which are accidental undocumented, unless we
> really consider them as good features (even if we bumped into them by
> accident), in which case they can be documented and their use can
> be blessed.
Yes i understand, but it is not a good feature IMHO.
These kind of functions should return an error with empty string, as
empty string is not a valid path.
But maybe this "feature" is used somewhere?

-- 
A + Thierry Volpiatto
Location: Saint-Cyr-Sur-Mer - France