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authorrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
committerrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
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+'\"
+'\" Copyright (c) 1993-1994 The Regents of the University of California.
+'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\"
+'\" SCCS: @(#) catch.n 1.6 96/03/25 20:11:08
+'\"
+.so man.macros
+.TH catch n "" Tcl "Tcl Built-In Commands"
+.BS
+'\" Note: do not modify the .SH NAME line immediately below!
+.SH NAME
+catch \- Evaluate script and trap exceptional returns
+.SH SYNOPSIS
+\fBcatch\fI script \fR?\fIvarName\fR?
+.BE
+
+.SH DESCRIPTION
+.PP
+The \fBcatch\fR command may be used to prevent errors from aborting
+command interpretation. \fBCatch\fR calls the Tcl interpreter recursively
+to execute \fIscript\fR, and always returns a TCL_OK code, regardless of
+any errors that might occur while executing \fIscript\fR. The return
+value from \fBcatch\fR is a decimal string giving the
+code returned by the Tcl interpreter after executing \fIscript\fR.
+This will be \fB0\fR (TCL_OK) if there were no errors in \fIscript\fR;
+otherwise
+it will have a non-zero value corresponding to one of the exceptional
+return codes (see tcl.h for the definitions of code values). If the
+\fIvarName\fR argument is given, then it gives the name of a variable;
+\fBcatch\fR will set the variable to the string returned
+from \fIscript\fR (either a result or an error message).
+.PP
+Note that \fBcatch\fR catches all exceptions, including those
+generated by \fBbreak\fR and \fBcontinue\fR as well as errors.
+
+.SH KEYWORDS
+catch, error