-- The Optional Exception Word Set
Copyright (C) Tektronix, Inc. 1998 - 2001. All rights reserved.
see the PFE-SIG wordset for catching OS traps.
( xt -- 0|n )(
execute the given execution-token and catch any exception that can be caught therein. software can arbitrarily raise an exception using THROW - the value 0 means there was no exception, other denote implementation dependent exception-codes.
dpANS 9.6.1.0875 - standard forth word
( n -- )(
raise an exception - it will adjust the depth of all stacks and start interpreting at the point of the latest CATCH <br> if n is null nothing happens, the -1 (ie. FALSE ) is the raise-code of ABORT - the other codes are implementation dependent and will result in something quite like ABORT
dpANS 188.8.131.525 - standard forth word
( -- )no-return(
throw - cleanup some things and go back to the QUIT routine
: ABORT -1 THROW ;
dpANS 9.6.2.0670 - standard forth word
throw like ABORT but print an additional error-message to stdout telling what has happened.
dpANS 9.6.2.0680 - standard forth word
( 1994 ) constant EXCEPTION-EXT
an ordinary constant (no special usage info)
threadstate variable NEXT-EXCEPTION
next_exception (no special usage info)