<HTML><HEAD><TITLE>Tcl Library Procedures - Tcl_AllowExceptions manual page</TITLE></HEAD><BODY> <H3><A NAME="M2">NAME</A></H3> Tcl_AllowExceptions - allow all exceptions in next script evaluation <H3><A NAME="M3">SYNOPSIS</A></H3> <B>#include <tcl.h></B><BR> <B>Tcl_AllowExceptions</B>(<I>interp</I>)<BR> <H3><A NAME="M4">ARGUMENTS</A></H3> <DL> <P><DT><A HREF="../TclLib/Interp.htm">Tcl_Interp</A> <B>*interp</B> (in)<DD> Interpreter in which script will be evaluated. <P></DL> <H3><A NAME="M5">DESCRIPTION</A></H3> If a script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script terminates with a completion code other than TCL_OK, TCL_CONTINUE or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR return with an appropriate message. <P> However, if <B>Tcl_AllowExceptions</B> is invoked immediately before calling a procedure such as <B><A HREF="../TclLib/Eval.htm">Tcl_Eval</A></B>, then arbitrary completion codes are permitted from the script, and they are returned without modification. This is useful in cases where the caller can deal with exceptions such as TCL_BREAK or TCL_CONTINUE in a meaningful way. <H3><A NAME="M6">KEYWORDS</A></H3> <A href="../Keywords/C.htm#continue">continue</A>, <A href="../Keywords/B.htm#break">break</A>, <A href="../Keywords/E.htm#exception">exception</A>, <A href="../Keywords/I.htm#interpreter">interpreter</A> <HR><PRE> <A HREF="../copyright.htm">Copyright</A> © 1989-1993 The Regents of the University of California. <A HREF="../copyright.htm">Copyright</A> © 1994-1996 Sun Microsystems, Inc. <A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE> </BODY></HTML>
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