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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.
-'\" 
-'\" RCS: @(#) $Id: catch.n,v 1.3 1999/04/16 00:46:34 stanton Exp $
-'\" 
-.so man.macros
-.TH catch n "8.0" 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 without raising an error,
-regardless of any errors that might occur while executing \fIscript\fR.
-.PP
-If \fIscript\fR raises an error, \fBcatch\fR will return a non-zero integer
-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 the variable it names is set to the error message from
-interpreting \fIscript\fR.
-.PP
-If \fIscript\fR does not raise an error, \fBcatch\fR will return 0
-(TCL_OK) and set the variable to the value returned from \fIscript\fR.
-.PP
-Note that \fBcatch\fR catches all exceptions, including those
-generated by \fBbreak\fR and \fBcontinue\fR as well as errors.  The
-only errors that are not caught are syntax errors found when the
-script is compiled.  This is because the catch command only catches
-errors during runtime.  When the catch statement is compiled, the
-script is compiled as well and any syntax errors will generate a Tcl
-error. 
-
-.SH EXAMPLES
-
-The \fBcatch\fR command may be used in an \fBif\fR to branch based on
-the success of a script.
-
-.DS
-.CS
-if { [catch {open $someFile w} fid] } {
-    puts stderr "Could not open $someFile for writing\\n$fid"
-    exit 1
-}
-.CE
-.DE
-The \fBcatch\fR command will not catch compiled syntax errors.  The
-first time proc \fBfoo\fR is called, the body will be compiled and a
-Tcl error will be generated. 
-
-.DS
-.CS
-proc foo {} {
-    catch {expr {1 +- }}
-}
-.CE
-.DE
-
-.SH KEYWORDS
-catch, error