257 lines
5.3 KiB
HTML
257 lines
5.3 KiB
HTML
|
<!DOCTYPE HTML>
|
||
|
|
<HTML LANG="en-us"
|
||
|
|
><HEAD
|
||
|
|
><TITLE
|
||
|
|
>invoke-debugger | Common Lisp Nova Spec</TITLE
|
||
|
|
><META CHARSET="US-ASCII"
|
||
|
|
><LINK REL="canonical" HREF="f_invoke-debugger.html"
|
||
|
|
><LINK REL="next" HREF="f_break.html" TYPE="text/html" TITLE="break"
|
||
|
|
><LINK REL="prev" HREF="t_simple-warning.html" TYPE="text/html" TITLE="simple-warning"
|
||
|
|
><LINK REL="up" HREF="9_2_Conditions_Dictionary.html" TYPE="text/html" TITLE="9.2 Conditions Dictionary"
|
||
|
|
><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
|
||
|
|
><META NAME="VIEWPORT" CONTENT="width=device-width, initial-scale=1.0"
|
||
|
|
><LINK REL="STYLESHEET" HREF="dpans.css%3F3909942064.css"
|
||
|
|
><SCRIPT SRC="dpans.js%3F3909942064"
|
||
|
|
></SCRIPT
|
||
|
|
><SCRIPT SRC="apropos.js%3F3909942064"
|
||
|
|
></SCRIPT
|
||
|
|
></HEAD
|
||
|
|
><BODY
|
||
|
|
><DIV
|
||
|
|
><DIV CLASS="topnav"
|
||
|
|
><DIV CLASS="breadcrumb"
|
||
|
|
><SPAN CLASS="breadcrumb-item"
|
||
|
|
><A HREF="index.html"
|
||
|
|
>Common Lisp Nova Spec</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="9_Conditions.html"
|
||
|
|
>9. Conditions</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="9_2_Conditions_Dictionary.html"
|
||
|
|
>9.2 Conditions Dictionary</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="f_invoke-debugger.html"
|
||
|
|
>invoke-debugger</A
|
||
|
|
></SPAN
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="apropos"
|
||
|
|
><DIV CLASS="apropos-io"
|
||
|
|
><A HREF="t_simple-warning.html" CLASS="prev"
|
||
|
|
>←</A
|
||
|
|
><SPAN ID="apropos-label"
|
||
|
|
>Apropos </SPAN
|
||
|
|
><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);"
|
||
|
|
><A HREF="f_break.html" CLASS="next"
|
||
|
|
>→</A
|
||
|
|
></DIV
|
||
|
|
><DIV ID="apropos-res"
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="matter"
|
||
|
|
><DIV CLASS="com"
|
||
|
|
><DIV CLASS="begincom"
|
||
|
|
><HR
|
||
|
|
><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
|
||
|
|
><TR
|
||
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
|
||
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="invoke-debugger"
|
||
|
|
></SPAN
|
||
|
|
><B
|
||
|
|
>invoke-debugger</B
|
||
|
|
></TD
|
||
|
|
><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
|
||
|
|
><I
|
||
|
|
>Function</I
|
||
|
|
></TD
|
||
|
|
></TR
|
||
|
|
></TABLE
|
||
|
|
><HR
|
||
|
|
></DIV
|
||
|
|
><UL CLASS="subtoc"
|
||
|
|
></UL
|
||
|
|
><DL
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Syntax</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><B
|
||
|
|
>invoke-debugger</B
|
||
|
|
> <SPAN CLASS="cmssi"
|
||
|
|
>condition</SPAN
|
||
|
|
> <SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
>|</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Arguments and Values</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><VAR CLASS="param"
|
||
|
|
>condition</VAR
|
||
|
|
> — a <A HREF="26_1_Glossary.html#condition"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>condition</EM
|
||
|
|
></A
|
||
|
|
> <A HREF="26_1_Glossary.html#object"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>object</EM
|
||
|
|
></A
|
||
|
|
>.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Description</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="f_invoke-debugger.html" CLASS="funref"
|
||
|
|
><B
|
||
|
|
>invoke-debugger</B
|
||
|
|
></A
|
||
|
|
> attempts to enter the debugger with <VAR CLASS="param"
|
||
|
|
>condition</VAR
|
||
|
|
>. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>If <A HREF="v_debugger-hook.html" CLASS="varref"
|
||
|
|
><B
|
||
|
|
>*debugger-hook*</B
|
||
|
|
></A
|
||
|
|
> is not <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
>, it should be a <A HREF="26_1_Glossary.html#function"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>function</EM
|
||
|
|
></A
|
||
|
|
> (or the name of a <A HREF="26_1_Glossary.html#function"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>function</EM
|
||
|
|
></A
|
||
|
|
>) to be called prior to entry to the standard debugger. The <A HREF="26_1_Glossary.html#function"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>function</EM
|
||
|
|
></A
|
||
|
|
> is called with <A HREF="v_debugger-hook.html" CLASS="varref"
|
||
|
|
><B
|
||
|
|
>*debugger-hook*</B
|
||
|
|
></A
|
||
|
|
> bound to <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
>, and the <A HREF="26_1_Glossary.html#function"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>function</EM
|
||
|
|
></A
|
||
|
|
> must accept two arguments: the <VAR CLASS="param"
|
||
|
|
>condition</VAR
|
||
|
|
> and the <A HREF="26_1_Glossary.html#value"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>value</EM
|
||
|
|
></A
|
||
|
|
> of <A HREF="v_debugger-hook.html" CLASS="misc"
|
||
|
|
><B
|
||
|
|
>*debugger-hook*</B
|
||
|
|
></A
|
||
|
|
> prior to binding it to <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
>. If the <A HREF="26_1_Glossary.html#function"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>function</EM
|
||
|
|
></A
|
||
|
|
> returns normally, the standard debugger is entered. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>The standard debugger never directly returns. Return can occur only by a non-local transfer of control, such as the use of a restart function.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Examples</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><PRE CLASS="screen"
|
||
|
|
> (ignore-errors ;Normally, this would suppress debugger entry
|
||
|
|
(handler-bind ((error #'invoke-debugger)) ;But this forces debugger entry
|
||
|
|
(error "Foo.")))
|
||
|
|
Debug: Foo.
|
||
|
|
To continue, type :CONTINUE followed by an option number:
|
||
|
|
1: Return to Lisp Toplevel.
|
||
|
|
Debug></PRE
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Side Effects</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="v_debugger-hook.html" CLASS="varref"
|
||
|
|
><B
|
||
|
|
>*debugger-hook*</B
|
||
|
|
></A
|
||
|
|
> is bound to <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
>, program execution is discontinued, and the debugger is entered.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Affected By</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="v_debug-io.html" CLASS="varref"
|
||
|
|
><B
|
||
|
|
>*debug-io*</B
|
||
|
|
></A
|
||
|
|
> and <A HREF="v_debugger-hook.html" CLASS="varref"
|
||
|
|
><B
|
||
|
|
>*debugger-hook*</B
|
||
|
|
></A
|
||
|
|
>.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>See Also</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="f_error.html" CLASS="funref"
|
||
|
|
><B
|
||
|
|
>error</B
|
||
|
|
></A
|
||
|
|
>, <A HREF="f_break.html" CLASS="funref"
|
||
|
|
><B
|
||
|
|
>break</B
|
||
|
|
></A
|
||
|
|
></P
|
||
|
|
></DD
|
||
|
|
></DL
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="footer"
|
||
|
|
><DIV CLASS="btmnav"
|
||
|
|
><A HREF="t_simple-warning.html" CLASS="prev"
|
||
|
|
>←</A
|
||
|
|
><A HREF="f_break.html" CLASS="next"
|
||
|
|
>→</A
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="trail"
|
||
|
|
>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><SCRIPT
|
||
|
|
>domReady();</SCRIPT
|
||
|
|
></BODY
|
||
|
|
></HTML
|
||
|
|
>
|