From _deepfire at feelingofgreen.ru  Fri Jul  1 08:10:26 2011
From: _deepfire at feelingofgreen.ru (Samium Gromoff)
Date: Fri, 01 Jul 2011 12:10:26 +0400
Subject: [fset-devel] Rereading reader bug for collections with non-NIL
	defaults.
In-Reply-To: <BANLkTinLJJBwB8CVEYPWLU3b8715O4n8Gg@mail.gmail.com>
References: <87ei2b4spk.fsf@auriga.feelingofgreen.ru>
	<BANLkTinLJJBwB8CVEYPWLU3b8715O4n8Gg@mail.gmail.com>
Message-ID: <87boxe4e19.fsf@auriga.feelingofgreen.ru>

On Thu, 30 Jun 2011 15:04:24 -0700, "Scott L. Burson" <Scott at sympoiesis.com> wrote:
> Thanks for the bug report!  I think it's the first that's ever been
> sent to this list :-)

I think I know the feeling : -)

FSET more than deserves more visibility and public attention..

> So you're actually using the reader macros?  I wasn't sure anyone
> would.  (I haven't even been using them myself.)

Yes, the kind of simple, observable and robust
serialisation/deserialisation provided by PRINT/READ fits nicely for my
current task.

> Do you need a fix quickly?

Not really -- I've opted for a low-intrusivity workaround and the fix
surely isn't critical in any sense.

What I'm struggling now with is "sharing abbreviation", as mentioned in
CLHS[1]:

CL-USER> (read-from-string (write-to-string (let ((c (cons nil nil)))
                                              (cons c c)))) (#1=(NIL)
                                              . #1#)

I'm trying to convert PRINT-* functions in fset.lisp to use
PPRINT-LOGICAL-BLOCK, but am hitting some unexpected problems.

Note that PPRINT-LOGICAL-BLOCK deals with *PRINT-LENGTH* and
*PRINT-DEPTH* (which FSET was dealing with on its own), but requires the
"logical contents" to be arranged as a list of conses -- which I think
is a small price to pay.

--
1. http://cs.hbg.psu.edu/LOCAL/HyperSpec/Body/mac_pprint-logical-block.html
-- 
regards,
  Samium Gromoff
--
"Actually I made up the term 'object-oriented', and I can tell you I
did not have C++ in mind." - Alan Kay (OOPSLA 1997 Keynote)



From _deepfire at feelingofgreen.ru  Sun Jul  3 14:47:35 2011
From: _deepfire at feelingofgreen.ru (Samium Gromoff)
Date: Sun, 03 Jul 2011 18:47:35 +0400
Subject: [fset-devel] Patch to facilitate circular/shared printing.
Message-ID: <8762nj4e0o.fsf@auriga.feelingofgreen.ru>

Scott,

The tip of my fset repository[1] ports the four
PRINT-WB-{SET,BAG,MAP,SEQ} functions to use PPRINT-LOGICAL-BLOCK,
replacing depth/length stops handling and adding circular/shared
structure printing.

--
1. git://git.feelingofgreen.ru/fset
-- 
regards,
  Samium Gromoff
--
"Actually I made up the term 'object-oriented', and I can tell you I
did not have C++ in mind." - Alan Kay (OOPSLA 1997 Keynote)



From Scott at sympoiesis.com  Mon Jul  4 05:35:40 2011
From: Scott at sympoiesis.com (Scott L. Burson)
Date: Sun, 3 Jul 2011 22:35:40 -0700
Subject: [fset-devel] Patch to facilitate circular/shared printing.
In-Reply-To: <8762nj4e0o.fsf@auriga.feelingofgreen.ru>
References: <8762nj4e0o.fsf@auriga.feelingofgreen.ru>
Message-ID: <CAF5LJ4BcBYkaszjGAw8bCc88kPFrezMr2kVGDMSKNMsc4hcLqQ@mail.gmail.com>

On Sun, Jul 3, 2011 at 7:47 AM, Samium Gromoff
<_deepfire at feelingofgreen.ru> wrote:
> The tip of my fset repository[1] ports the four
> PRINT-WB-{SET,BAG,MAP,SEQ} functions to use PPRINT-LOGICAL-BLOCK,
> replacing depth/length stops handling and adding circular/shared
> structure printing.

Merged.  Thanks!!

-- Scott