93 lines
4.5 KiB
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93 lines
4.5 KiB
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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Issue BREAK-ON-WARNINGS-OBSOLETE Writeup</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="../Issues/iss019_w.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="../Issues/iss020.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="../Issues/iss021_w.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<H2>Issue BREAK-ON-WARNINGS-OBSOLETE Writeup</H2>
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<PRE><B>Status:</B> Passed, as amended, Mar 89 X3J13<P>
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<B>Issue:</B> <A HREF="iss020.htm">BREAK-ON-WARNINGS-OBSOLETE</A><P>
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<B>Forum:</B> Cleanup<P>
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<B>References:</B> *BREAK-ON-WARNINGS* (CLtL p432, CL Condition System p40)<P>
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<A REL=DEFINITION HREF="../Body/v_break_.htm#STbreak-on-signalsST"><B>*BREAK-ON-SIGNALS*</B></A> (CL Condition System p25)<P>
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<B>Category:</B> CLARIFICATION/CHANGE<P>
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<B>Edit history:</B> 07-Mar-89, Version 1 by Pitman<P>
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8-Apr-89, Version 2 by Masinter (as amended; update discussion)<P>
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<P>
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<B>Problem Description:<P>
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</B><P>
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With the advent of <A REL=DEFINITION HREF="../Body/v_break_.htm#STbreak-on-signalsST"><B>*BREAK-ON-SIGNALS*</B></A>, *BREAK-ON-WARNINGS* is<P>
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redundant and unnecessary.<P>
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<P>
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<B>Proposal (BREAK-ON-WARNINGS-OBSOLETE:REMOVE):<P>
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</B><P>
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Remove *BREAK-ON-WARNINGS*.<P>
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<P>
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<B>Test Case:<P>
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</B><P>
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N/A<P>
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<P>
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<B>Rationale:<P>
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</B><P>
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This will lead to simplification of the description of <A REL=DEFINITION HREF="../Body/f_warn.htm#warn"><B>WARN</B></A>.<P>
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<P>
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Not only are the two variables overkill, but they have an effect<P>
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in an identifiably but uselessly distinct place.<P>
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<P>
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<B>Current Practice:<P>
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</B><P>
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Most have *BREAK-ON-WARNINGS*.<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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slight.<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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Users will have to write (<A REL=DEFINITION HREF="../Body/s_setq.htm#setq"><B>SETQ</B></A> <A REL=DEFINITION HREF="../Body/v_break_.htm#STbreak-on-signalsST"><B>*BREAK-ON-SIGNALS*</B></A> '<A REL=DEFINITION HREF="../Body/e_warnin.htm#warning"><B>WARNING</B></A>)<P>
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rather than (<A REL=DEFINITION HREF="../Body/s_setq.htm#setq"><B>SETQ</B></A> *BREAK-ON-WARNINGS* T).<P>
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<P>
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Since this is mainly done interactively and not in programs,<P>
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the cost is slight.<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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The definition of <A REL=DEFINITION HREF="../Body/f_warn.htm#warn"><B>WARN</B></A> will be gratuitously cluttered.<P>
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<P>
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<B>Benefits:<P>
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</B><P>
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Cost of non-adoption is avoided.<P>
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<P>
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<B>Aesthetics:<P>
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</B><P>
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Slight improvement.<P>
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<P>
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<B>Discussion:<P>
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</B><P>
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Pitman thinks this is a good idea, but doesn't think a lot of time<P>
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should be wasted discussing the issue if there is strong opposition.<P>
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</PRE>
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