"
COPYRIGHT (c) 1995 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
Signal subclass:#QuerySignal
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Kernel-Exceptions'
!
!QuerySignal class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1995 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
version
"
$Header: /cvs/stx/stx/libbasic/QuerySignal.st,v 1.1 1995-09-02 16:08:30 claus Exp $
"
!
documentation
"
QuerySignals are like signals, except that they are not accepted
by handlers for ordinary signals.
I.e. a signal handler for a normal signal will not handle a query
signal. Thus, these bypass any Object-ErrorSignal handler.
"
! !
!QuerySignal methodsFor:'queries'!
isQuerySignal
^ true
!
accepts:aSignal
"return true, if the receiver accepts the argument, aSignal.
(i.e. the receiver is aSignal or a parent of it). False otherwise."
|s|
aSignal isQuery ifFalse:[^ false].
s := aSignal.
[s notNil] whileTrue:[
self == s ifTrue:[^ true].
s := s parent
].
^ false
! !