catch man page on BSDi

catch man page on BSDi

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catch(n)	      Tcl Built-In Commands		 catch(n)

_________________________________________________________________

NAME
       catch - Evaluate script and trap exceptional returns

SYNOPSIS
       catch script ?varName?
_________________________________________________________________

DESCRIPTION
       The  catch  command  may	 be  used  to prevent errors from
       aborting command	 interpretation.   Catch  calls	 the  Tcl
       interpreter  recursively	 to  execute  script,  and always
       returns a TCL_OK code, regardless of any errors that might
       occur while executing script.  The return value from catch
       is a decimal string giving the code returned  by	 the  Tcl
       interpreter  after  executing  script.	This  will  be	0
       (TCL_OK) if there were no errors in script;  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 varName argument is given, then it
       gives the name of a variable; catch will set the	 variable
       to  the string returned from script (either a result or an
       error message).

       Note that catch catches all  exceptions,	 including  those
       generated by break and continue as well as errors.

KEYWORDS
       catch, error

Tcl								1

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