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Re: Output recording and presentations

    Date: Wed, 13 Oct 1993 17:33 EDT
    From:     Nichael Cramer <ncramer@BBN.COM>

    > Date: 13 Oct 1993 12:15:00 -0700 (PDT)
    > From: "William M. York" <york@parc.xerox.com>
    >    Date:	Tue, 12 Oct 1993 11:39:06 -0700
    >    From:	Brian Anderson 234-0878 <bha@ata.ca.boeing.com>
    >    > Date: Mon, 11 Oct 1993 13:28 -0400
    >    > From: Scott McKay <SWM@stony-brook.scrc.symbolics.com>
    >    > WITH-OUTPUT-AS-PRESENTATION turns output recording back on for you,
    >    > but I can't recall the reason why it does this.  I think it's probably
    >    > a bug.
    >    Note that on page 23-17 of the spec, it says that the presentation is
    >    *not* inserted in the output history if output recording is off.  I
    >    was counting on this to use the idiom of creating a bunch of output
    >    records with output recording and drawing off, insert them into the
    >    appropriate place in the output history, and replay them myself.  This
    >    almost worked except for the fact that the presentation output record
    >    was inserted at the top level of the history (when I ran things to
    >    create an output record) and in another place in the history when I
    >    inserted it there myself.
    > Ah, you definitely want with-output-to-output-record.  Then you don't
    > even turn recording off, you just collect the output records in a
    > separate "root" record, which you splice into the history at your
    > convenience.

    I tried something similar here.  WITH-OUTPUT-TO-OUTPUT-RECORD was fine when
    I wanted just output-records.  However I could never figure out how to get
    a real honest-to-goodness presentation out of it (as Brian describes in his
    original note).

    Am I just being dense?  What am I missing here?

WITH-OUTPUT-TO-OUTPUT-RECORD wraps the output done by its body in one
more output record.  Just map over its children.
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