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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>3.3.4 Error Reporting and Exit</TITLE><META NAME="description" CONTENT="3.3.4 Error Reporting and Exit"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node13.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node13.html"><LINK REL="previous" HREF="node11.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node11.html"><LINK REL="up" HREF="node8.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node8.html"><LINK REL="next" HREF="node13.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node13.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html1324" HREF="node13.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node13.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html1318" HREF="node8.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node8.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html1312" HREF="node11.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node11.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html1320" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html1322" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html1325" HREF="node13.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node13.html">3.3.5 Hash Functions within</A><B> Up:</B> <A NAME="tex2html1319" HREF="node8.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node8.html">3.3 Class Tcl</A><B> Previous:</B> <A NAME="tex2html1313" HREF="node11.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node11.html">3.3.3 Passing Results to/from</A>   <B> <A NAME="tex2html1321" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html1323" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H2><A NAME="SECTION02134000000000000000"></A><A NAME="sec:ErrorReporting"></A><BR>3.3.4 Error Reporting and Exit</H2><P>This method provides a uniform way to report errors in the compiled code.<DL COMPACT><DT><DD>[const char* ]tcl.error../Tcl/Tcl.ccTcl::errorperforms the following functions:write to stdout; write <TT>tcl_-result</TT> to stdout;exit with error code 1.</DD></DL><PRE> {\bfseries{}tcl.resultf}("cmd = %s", cmd); {\bfseries{}tcl.error}("invalid command specified"); /*{}NOTREACHED*/</PRE><P>Note thatthere are minor differences between returning TCL_ERRORas we did in the previous subsectionSectionsec:Result,and calling []Tcl::error.The former generates an exception within the interpreter;the user can trap the exception and possibly recover from the error.If the user has not specified any traps, the interpreter will print a stack trace and exit.However, if the code invokes []error,then the simulation user cannot trap the error;in addition, will not print any stack trace.<P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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