201 lines
4.8 KiB
HTML
201 lines
4.8 KiB
HTML
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<!DOCTYPE HTML>
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<HTML LANG="en-us"
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><HEAD
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><TITLE
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>serious-condition | Common Lisp Nova Spec</TITLE
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><LINK REL="canonical" HREF="t_serious-condition.html"
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><LINK REL="prev" HREF="t_style-warning.html" TYPE="text/html" TITLE="style-warning"
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><LINK REL="up" HREF="9_2_Conditions_Dictionary.html" TYPE="text/html" TITLE="9.2 Conditions Dictionary"
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><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
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><SPAN CLASS="breadcrumb-item"
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><A HREF="index.html"
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>Common Lisp Nova Spec</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="9_Conditions.html"
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>9. Conditions</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="9_2_Conditions_Dictionary.html"
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>9.2 Conditions Dictionary</A
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></SPAN
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="t_serious-condition.html"
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>serious-condition</A
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></SPAN
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></DIV
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><DIV CLASS="apropos"
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><DIV CLASS="apropos-io"
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><A HREF="t_style-warning.html" CLASS="prev"
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>←</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
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><A HREF="t_error.html" CLASS="next"
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>→</A
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></DIV
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><DIV ID="apropos-res"
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></DIV
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></DIV
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></DIV
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><DIV CLASS="matter"
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><DIV CLASS="com"
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><HR
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TR
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="serious-condition"
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></SPAN
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><B
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>serious-condition</B
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Condition</I
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> <I
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>Type</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Class Precedence List</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="t_serious-condition.html" CLASS="typeref"
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><B
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>serious-condition</B
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></A
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>, <A HREF="t_condition.html" CLASS="typeref"
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><B
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>condition</B
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></A
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>, <A HREF="t_t.html" CLASS="typeref"
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><B
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>t</B
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></A
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></P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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>All <A HREF="26_1_Glossary.html#condition"
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><EM CLASS="term"
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>conditions</EM
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></A
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> serious enough to require interactive intervention if not handled should inherit from the <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>type</EM
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></A
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> <A HREF="t_serious-condition.html" CLASS="typeref"
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><B
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>serious-condition</B
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></A
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>. This condition type is provided primarily so that it may be included as a <A HREF="26_1_Glossary.html#superclass"
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><EM CLASS="term"
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>superclass</EM
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></A
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> of other <A HREF="26_1_Glossary.html#condition"
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><EM CLASS="term"
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>condition</EM
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></A
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> <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>types</EM
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></A
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>; it is not intended to be signaled directly.</P
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></DD
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><DT
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><B
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>Notes</B
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></DT
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><DD
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><P CLASS="j"
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>Signaling a <A HREF="26_1_Glossary.html#serious_condition"
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><EM CLASS="term"
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>serious condition</EM
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></A
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> does not itself force entry into the debugger. However, except in the unusual situation where the programmer can assure that no harm will come from failing to <A HREF="26_1_Glossary.html#handle"
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><EM CLASS="term"
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>handle</EM
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></A
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> a <A HREF="26_1_Glossary.html#serious_condition"
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><EM CLASS="term"
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>serious condition</EM
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></A
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>, such a <A HREF="26_1_Glossary.html#condition"
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><EM CLASS="term"
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>condition</EM
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></A
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> is usually signaled with <A HREF="f_error.html" CLASS="funref"
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><B
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>error</B
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></A
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> rather than <A HREF="f_signal.html" CLASS="funref"
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><B
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>signal</B
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></A
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> in order to assure that the program does not continue without <A HREF="26_1_Glossary.html#handle"
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><EM CLASS="term"
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>handling</EM
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></A
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> the <A HREF="26_1_Glossary.html#condition"
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><EM CLASS="term"
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>condition</EM
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></A
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>. (And conversely, it is conventional to use <A HREF="f_signal.html" CLASS="funref"
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><B
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>signal</B
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></A
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> rather than <A HREF="f_error.html" CLASS="funref"
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><B
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>error</B
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></A
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> to signal conditions which are not <A HREF="26_1_Glossary.html#serious_condition"
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><EM CLASS="term"
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>serious conditions</EM
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></A
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>, since normally the failure to handle a non-serious condition is not reason enough for the debugger to be entered.)</P
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><DIV CLASS="btmnav"
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><A HREF="t_style-warning.html" CLASS="prev"
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>←</A
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><A HREF="t_error.html" CLASS="next"
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>→</A
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></DIV
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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></DIV
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></DIV
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><SCRIPT
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>domReady();</SCRIPT
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></BODY
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></HTML
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>
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