Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!usenet.ins.cwru.edu!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!attmail.UUCP!uucp
From: uucp@attmail.UUCP
Newsgroups: comp.lang.scheme
Subject: (none)
Message-ID: <9001050216.aa06444@mintaka.lcs.mit.edu>
Date: 5 Jan 90 06:04:02 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 73

Received: from attbl by attmail; Fri Jan  5 06:03 GMT 1990
>From arpa!CUNYVM.CUNY.EDU!Scheme%mc.lcs.mit.edu%mintaka.lcs.mit.edu Fri Jan 5 00:11:45 EST 1990 remote from attbl
Received: from SCF.FUNDP.AC.BE by CUNYVM.CUNY.EDU (IBM VM SMTP R1.2.2MX) with BSMTP id 9863; Fri, 05 Jan 90 00:43:57 EDT
Received: by BNANDP11 (Mailer R2.02A) id 7403; Fri, 05 Jan 90 06:35:18 +0100
Date:         Fri, 5 Jan 90 00:11:45 EST
Reply-To:     Scheme%mc.lcs.mit.edu%mintaka.lcs.mit.edu@CUNYVM.CUNY.EDU
Sender:       Scheme Programming Language <SCHEME%BNANDP11.BITNET@CUNYVM.CUNY.EDU>
From: attbl!arpa!CUNYVM.CUNY.EDU!Scheme%mc.lcs.mit.edu%mintaka.lcs.mit.edu (Automatic Scheme Digestifier)
              <Scheme-Request%mc.lcs.mit.edu@MINTAKA.LCS.MIT.EDU>
Subject:      Scheme Digest #268
Comments: To: Scheme%mc.lcs.mit.edu@mintaka.lcs.mit.edu
To:           ICSUG TEST GROUP
              <attmail!mhs!envoy!ICS.TEST/PN=_TEST_GROUP@ATT.ATT.COM>

Scheme Digest #268                              5 JAN 90  00:11:45 EST

Today's Topics:

        Mac implementations
        exit on Schemes for Unix

----------------------------------------------------------------------

Date: 4 Jan 90 05:52:29 GMT
From: Andres Moreno <moreno@UMN-CS.CS.UMN.EDU>
Subject: Mac implementations
Message-Id: <18025@umn-cs.CS.UMN.EDU>

Does anybody have any experience with MacScheme? Do you recomend to look
into another dialect of LISP for this machine? Does anyone know anything
about ExperLOGO?

I'd appreciate any suggestions regarding LISPs and Schemes for PCs or  Macs
(or any other small machine costing less than $4,000) since I am in the
market for a new computer.

Thanks, Andres F. Moreno

------------------------------

From: ramsdell@linus.mitre.org
Message-Id: <9001041217.AA11268@huxley.mitre.org>
Subject: exit on Schemes for Unix
Date: Thu, 04 Jan 90 07:17:56 EST

Please remember, Scheme is not always used interactively!!!

To: Implementors of Scheme on Unix
Subject: Let your Scheme's exit status reflect the current break level.

I would like to encourage all Scheme Implementors which target Unix to
add a fairly simple feature.  When the exit command is called with no
arguments, or when there is nothing more to read from standard input,
the Scheme interpreter process should set the status bits returned to
the parent process to the break level.  When there has been no errors,
that status should be set to zero, the Unix convention for successful
completion.  A non-zero break level indicates an error, and that state
should be reflected by a non-zero exit status.

For just one example of where this might be useful, consider the
writing of Makefiles.  Suppose we have the rule:

.scm.sobj:
	echo "(compile-file \"$*.sobj\")" | scheme

The rule will fail when the compiler detects an error.

John

------------------------------

End of Scheme Digest
********************