35 lines
4.4 KiB
HTML
35 lines
4.4 KiB
HTML
<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
|
|
<HTML>
|
|
<HEAD>
|
|
<TITLE>CLHS: Section 9.1.3</TITLE>
|
|
<LINK HREF="../Data/clhs.css" REL="stylesheet" TYPE="text/css" />
|
|
<META HTTP-EQUIV="Author" CONTENT="Kent M. Pitman">
|
|
<META HTTP-EQUIV="Organization" CONTENT="LispWorks Ltd.">
|
|
<LINK REL=TOP HREF="../Front/index.htm">
|
|
<LINK REL=COPYRIGHT HREF="../Front/Help.htm#Legal">
|
|
<LINK REL=DISCLAIMER HREF="../Front/Help.htm#Disclaimer">
|
|
<LINK REL=PREV HREF="09_aba.htm">
|
|
<LINK REL=UP HREF="09_a.htm">
|
|
<LINK REL=NEXT HREF="09_aca.htm">
|
|
</HEAD>
|
|
<BODY>
|
|
<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="09_aba.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="09_a.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="09_aca.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
|
|
|
|
<HR>
|
|
|
|
<H2>
|
|
9.1.3 Printing Conditions</H2> <P>
|
|
If the <TT>:report</TT> argument to <A REL=DEFINITION HREF="m_defi_5.htm#define-condition"><B>define-condition</B></A> is used, a print function is defined that is called whenever the defined <A REL=DEFINITION HREF="26_glo_c.htm#condition"><I>condition</I></A> is printed while the <A REL=DEFINITION HREF="26_glo_v.htm#value"><I>value</I></A> of <A REL=DEFINITION HREF="v_pr_esc.htm#STprint-escapeST"><B>*print-escape*</B></A> is <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>. This function is called the <A REL=DEFINITION HREF="26_glo_c.htm#condition_reporter"><I>condition reporter</I></A>; the text which it outputs is called a <A REL=DEFINITION HREF="26_glo_r.htm#report_message"><I>report message</I></A>. <P>
|
|
When a <A REL=DEFINITION HREF="26_glo_c.htm#condition"><I>condition</I></A> is printed and <A REL=DEFINITION HREF="v_pr_esc.htm#STprint-escapeST"><B>*print-escape*</B></A> is <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>, the <A REL=DEFINITION HREF="26_glo_c.htm#condition_reporter"><I>condition reporter</I></A> for the <A REL=DEFINITION HREF="26_glo_c.htm#condition"><I>condition</I></A> is invoked. <A REL=DEFINITION HREF="26_glo_c.htm#condition"><I>Conditions</I></A> are printed automatically by functions such as <A REL=DEFINITION HREF="f_invoke.htm#invoke-debugger"><B>invoke-debugger</B></A>, <A REL=DEFINITION HREF="f_break.htm#break"><B>break</B></A>, and <A REL=DEFINITION HREF="f_warn.htm#warn"><B>warn</B></A>. <P>
|
|
When <A REL=DEFINITION HREF="v_pr_esc.htm#STprint-escapeST"><B>*print-escape*</B></A> is <A REL=DEFINITION HREF="26_glo_t.htm#true"><I>true</I></A>, the <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A> should print in an abbreviated fashion according to the style of the implementation (e.g., by <A REL=DEFINITION HREF="m_pr_unr.htm#print-unreadable-object"><B>print-unreadable-object</B></A>). It is not required that a <A REL=DEFINITION HREF="26_glo_c.htm#condition"><I>condition</I></A> can be recreated by reading its printed representation. <P>
|
|
No <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A> is provided for directly <I>accessing</I> or invoking <A REL=DEFINITION HREF="26_glo_c.htm#condition_reporter"><I>condition reporters</I></A>. <P>
|
|
|
|
|
|
<A REL=CHILD HREF="09_aca.htm"><H2>
|
|
9.1.3.1 Recommended Style in Condition Reporting</H2></A><P><HR>
|
|
|
|
<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
|
|
|
|
<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
|
|
</BODY>
|
|
</HTML>
|