Steel Bank Common Lisp

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On Wed, 2005-11-23 at 14:18 -0500, Michael Price wrote:
> On 11/23/05, Tim Daly Jr. <tim@...> wrote:
...
> > You can escape the [, but then the namestring ends up with a backslash
> > in it: (namestring #p"/tmp/\\[P]foo") => "/tmp/\\[P]foo".
> 
> What about this:
> 
> $ touch "[P]file"
> $ ls \[P\]*
> [P]file
> $ sbcl
> CL-USER> (directory #p"/tmp/\[P]*")
> 
> (#P"/tmp/\\[P]file")

Right.  Now there's a backslash in the namestring of that pathname,
which makes it less useful for, e.g., handing to unix system calls.
(Which is, IMHO, not such a silly thing to want to do...)

--
-Tim

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On Nov 23, 2005, at 3:16 PM, Michael Price wrote:

> On 11/23/05, Michael Price <michael@...> wrote:
>>   CL-USER> (make-pathname :directory '(:absolute "tmp") :name 
>> "[P]file")
>>
>>   #P"/tmp/\\[P]file"
>>
>>   CL-USER> (pathname-name *)
>>
>>   "[P]file"
>
> Sorry to reply to myself, but to continue that idea:
>
>   CL-USER> (concatenate 'string (directory-namestring **) 
> (pathname-name **))
>
>   "/tmp/[P]file"

As usual, recipe for disaster.

Your previous suggestion was better.

Cheers
--
Marco

--
Marco Antoniotti					http://bioinformatics.nyu.edu/~marcoxa
NYU Courant Bioinformatics Group		tel. +1 - 212 - 998 3488
715 Broadway 10th FL				fax. +1 - 212 - 998 3484
New York, NY, 10003, U.S.A.

"Tim Daly Jr." <tim@...> writes:

> On Wed, 2005-11-23 at 14:18 -0500, Michael Price wrote:
>> On 11/23/05, Tim Daly Jr. <tim@...> wrote:
> ...
>> > You can escape the [, but then the namestring ends up with a backslash
>> > in it: (namestring #p"/tmp/\\[P]foo") => "/tmp/\\[P]foo".
>> 
>> What about this:
>> 
>> $ touch "[P]file"
>> $ ls \[P\]*
>> [P]file
>> $ sbcl
>> CL-USER> (directory #p"/tmp/\[P]*")
>> 
>> (#P"/tmp/\\[P]file")
>
> Right.  Now there's a backslash in the namestring of that pathname,
> which makes it less useful for, e.g., handing to unix system calls.
> (Which is, IMHO, not such a silly thing to want to do...)

This is why God^WThe SBCL Development Team gave us sb-posix.

In general, Lisp namestrings are not Unix pathnames; no need to go as
far as #\[ characters: you'll see the same effect with files with a
Unix pathname containing #\*.

The pattern matching in DIRECTORY does indeed look broken, though, but
what's _meant_ to happen with your namestring "[P]*.*" is that it
would match all files beginning with an uppercase P.

Cheers,

Christophe

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On Wed, 23 Nov 2005, Michael Price wrote:

> directory has the [] characters in its name and try to load the
> osicat-test or terminfo packages using asdf.

Osicat relies on the fundamentally broken assumption that NAMESTRING
gives you an Unix pathname.

Cheers,

  -- Nikodemus              Schemer: "Buddha is small, clean, and serious."
                   Lispnik: "Buddha is big, has hairy armpits, and laughs."

"Tim Daly Jr." <tim@...> writes:

> If I say (directory #p"/tmp/[P]*.*"), I get a type-error ``The value "P"
> is not of type CHARACTER.''  Is that intended to be that way?

No, and I've checked in a fix for this as sbcl-0.9.7.3.

Thanks for the report,

Cheers,

Christophe