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116 lines
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<H2>Issue LOOP-PRESENT-SYMBOLS-TYPO Writeup</H2>
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<PRE><B>Status:</B> Accepted 3/31/92<P>
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<B>Issue:</B> <A HREF="iss225.htm">LOOP-PRESENT-SYMBOLS-TYPO</A><P>
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<B>References:</B> X3J13/92-101, page 6-13, 6-25; X3J13/89-004, page 2-14<P>
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<B>Related issues: <P>
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</B><B>Category:</B> CHANGE<P>
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<B>Edit history:</B> 24-Feb-92 Version 1 by JonL<P>
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<P>
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<B>Problem description:<P>
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</B><P>
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Iteration over "present" symbols by the loop schema PRESENT-SYMBOLS<P>
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excludes all present but external symbols.<P>
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<P>
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<P>
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<B>Proposal (LOOP-PRESENT-SYMBOLS-TYPO:FLUSH-WRONG-WORDS):<P>
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</B><P>
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Remove the words:<P>
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"... but not \term{external symbols} of that \term{package}."<P>
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from the first sentence of the draft description on page 6-13.<P>
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<P>
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Add the line:<P>
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"\OUT THIS"<P>
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to the output of the draft example at the top of page 6-25.<P>
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<P>
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<B>Rationale:<P>
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</B><P>
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This is clearly a typo since the phrase "present symbols" has had<P>
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a precise technical meaning since the early 1980's; furthermore,<P>
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it has a significant adverse impact on the intended semantics.<P>
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<P>
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<B>Current practice:<P>
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</B><P>
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All of Lucid's implementation use the meaning of "present" rather <P>
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than "internal"; apparently one of Symbolics' implementations uses<P>
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"internal".<P>
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<P>
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<B>Cost to Implementors:<P>
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</B><P>
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Surely, very small (probably more to marketing types.)<P>
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<P>
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<B>Cost to Users:<P>
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</B><P>
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Again, small if any at all. <P>
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<P>
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<B>Cost of non-adoption:<P>
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</B><P>
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Occurance of many obscure bugs (looping over present symbols misses<P>
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some of those present); egg on face for such a misnomered feature.<P>
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<P>
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<P>
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<B>Performance impact:<P>
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</B><P>
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None.<P>
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<P>
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<B>Editorial impact:<P>
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</B><P>
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KMP says, in an email msg of Thu, 13 Feb 1992 22:57-0500:<P>
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<P>
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I estimate the editorial impact to be about 2 minutes of work ..."<P>
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<P>
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<B>Benefits:<P>
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</B><P>
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See Cost of non-adoption.<P>
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<P>
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<B>Esthetics:<P>
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</B><P>
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Say what you mean.<P>
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<P>
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<B>Discussion:<P>
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</B><P>
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Possibly some user might think that this odd wording is simply a means <P>
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of resurrecting the non-proposed schema for INTERNAL-SYMBOLS; but this <P>
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schema was considered and rejected on its own (non) merits.<P>
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<P>
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Some "bibliographic archeology" of the actual <A REL=DEFINITION HREF="../Body/m_loop.htm#loop"><B>LOOP</B></A> proposal --<P>
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X3J13/89-004 -- shows that the wording in the original sources were <P>
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very confusing, leading to the conculsion that the offensive phrase <P>
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was inserted (by someone not knowing what they were doing?) into<P>
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X3J13/89-004 to lessen the "confusion"<P>
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<P>
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Moon has questioned how the committee could have voted upon<P>
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X3J13/89-004 without reading it more carefully and noticing this <P>
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glitch. JonL compares the scrutiny of X3J13/89-004 with that given <P>
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to X3J13/88-002R (i.e., probably no on re-read either before voting.)<P>
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<P>
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<P>
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</PRE>
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