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Modification to LISTEN

To: robbins@DEC-HUDSON.ARPA
Subject: Modification to LISTEN
From: "Scott E. Fahlman" <Fahlman@C.CS.CMU.EDU>
Date: Wed, 18 Sep 1985 16:56:00 -0000
Cc: common-lisp@SU-AI.ARPA
In-reply-to: Msg of 18 Sep 1985 11:07-EDT from robbins at DEC-HUDSON
Sender: FAHLMAN@C.CS.CMU.EDU

    I would like to have LISTEN return two values.  The first value is the same as
    it is now and the second value is true if end of file is encountered.  The
    new definition allows READ-CHAR-NO-HANG to be implemented using only READ-CHAR
    and LISTEN.

Looks like a good suggestion to me.  It could be implemented in a
completely upward-compatible way.

-- Scott

Follow-Ups:
- Modification to LISTEN
  - From: Mike McMahon <MMcM@SCRC-STONY-BROOK.ARPA>
- Returning additional values from advertised functions
  - From: Richard Mlynarik

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