author | Stefan Vogel <sv@exept.de> |
Mon, 22 Jun 2015 11:24:02 +0200 | |
changeset 18494 | 41f8a86105f0 |
parent 16562 | de9b98f4a494 |
child 18120 | e3a375d5f6a8 |
child 18726 | 36732bc5400c |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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Object subclass:#Signal |
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instanceVariableNames:'mayProceed notifierString nameClass message handlerBlock parent' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Kernel-Exceptions' |
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! |
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!Signal class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Note: |
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The instance based Signal framework is being replaced by class based exceptions. |
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I.e. what used to be instances of Signal/QuerySignal is beeing |
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rewritten into subclasses of Exception/Error/Query and Warning. |
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Although the functionality is basically unchanged, the new |
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class based exceptions are easier to instanciate (no need for |
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creation in a classes initialize method), easier to use (no real |
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need for Signal-constant accessors) and allow for easier parameter |
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passing (not only a single parameter, but allows for individual |
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exception subclasses to add additional state). |
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However, the old Signal hierarchy will remain in existance, since it allows |
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funny instance-specific and anonymous exception handling schemes to be |
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implemented, which are hard to built using class-based exceptions. |
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Signal and Exception provide a framework for exception handling. |
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A Signal object is usually defined somewhere up in the calling chain |
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and associated with some abnormal event. Many signals are also |
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created at startup time and reused. |
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When the event is raised (by Signal>>raise) the control will be either |
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given to a debugger or - if a handler was defined - to the handler. |
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The handler will get a description of what (and where) happened in an |
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Exception object and can decide how to react on the situation (i.e. |
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proceed, return or restart). |
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There is also a companion class called SignalSet, which allows handling |
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multiple signals with one handler (for example all arithmetic signals). |
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And, finally there is a very special SignalSet which allows catching |
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any signal (SignalSet>>anySignal). |
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Since there is no official documentation on signal handling (i.e. none |
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of the books describes it), this Signal implementation has been modeled |
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after what some PD programs seem to expect and what alpha/beta testers told |
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me it should look like. |
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It may not be perfect and undergo minor changes. |
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special: |
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In addition to the nested catch & throw mechanism, signals can also be |
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used when no such handler scope exists. To support this, signals can be |
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assigned a handlerBlock, which gets evaluated with the exception as argument |
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in case no handler was found (on the stack). |
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If no handler was found (i.e. neither a handler context on the stack, nor |
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a static handler block), the NoHandlerSignal will be raised instead, |
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passing it the original exception in its exception-parameter. |
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This NoHandlerSignal can be handled just like any other signal. |
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(therefore, it is possible to catch any error by catching NoHandlerSignal. |
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When the NoHandler signal is raised, and neither a handler-context, nor |
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a handler block is defined for it, an emergencyHandler(-block) is evaluated. |
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This block is either provided by the current process |
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(see Process>>emergencySignalHandler) or as a global default by the Exception |
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class (see Exception>>emergencyHandler). |
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The default emergencyHandlerBlock (from Exception) will bring up a debugger. |
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HandlerBlocks allow a global (if its the EmergencyHandler in Exception) |
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or per-process signal handling to be added. Even to code which was never |
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planned to handle signals. |
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See samples in 'doc/coding' and actual raise code in Exception. |
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[Instance variables:] |
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mayProceed <Boolean> hint for the debugger - program may |
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proceed (currently not honored by the |
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debugger) |
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notifierString <String> error message to be output |
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nameClass <Class> for the printOn-implementation; nameClass |
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is the class, to which message (below) |
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should be sent to create the receiver. |
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message <Symbol> for the printOn-implementation; message |
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is the selector, which should be sent to |
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nameClass (above) to create the receiver. |
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handlerBlock <Block> if nonNil, a 1-arg block to be |
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evaluated when no handler context is |
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found. The block gets the exception |
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object as argument. This will play the role |
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of an on-stack handler. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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GenericException |
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SignalSet QuerySignal |
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Object |
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(``Exception handling and signals'': programming/exceptions.html) |
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" |
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! ! |
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!Signal class methodsFor:'instance creation'! |
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new |
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"return a new signal" |
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^ (self basicNew) notifierString:'signal'; mayProceed:true |
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" |
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Signal new |
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" |
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"Modified: 8.10.1997 / 11:51:39 / cg" |
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! ! |
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!Signal class methodsFor:'Signal constants'! |
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genericSignal |
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"return the generic signal - thats the parent of all signals |
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in the system." |
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^ GenericException |
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"Created: / 8.10.1997 / 11:46:28 / cg" |
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"Modified: / 8.10.1997 / 11:47:08 / cg" |
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"Modified: / 4.8.1999 / 08:54:33 / stefan" |
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! |
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noHandlerSignal |
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"return the signal used to handle unhandled signals" |
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^ NoHandlerError |
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"Modified: / 4.8.1999 / 08:10:09 / stefan" |
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! ! |
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!Signal methodsFor:'Compatibility-ANSI'! |
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signalWith:messageText |
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"ANSI compatibility" |
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self raiseErrorString:messageText |
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! ! |
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!Signal methodsFor:'Compatibility-VW'! |
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messageText:aString |
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^ self notifierString:aString |
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! |
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new |
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"create a new signal, using the receiver as a prototype and |
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setting the parent of the new signal to the receiver." |
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^ self newSignal |
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! ! |
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!Signal methodsFor:'accessing'! |
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creator |
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"return the creator of the exception (for exception protocol compatibilty). |
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For class based exceptions, that is the exception class; |
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for signals, that is the signal itself." |
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^ self |
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! |
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||
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errorString |
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"errorString is deprecated, use description instead" |
205 |
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206 |
<resource:#obsolete> |
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^ self description |
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! |
159 | 210 |
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622 | 211 |
handlerBlock |
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"return the handlerblock - if non-nil, this will be evaluated with the exception |
622 | 213 |
object as argument, if no #handle:do: context was found on the stack." |
214 |
||
215 |
^ handlerBlock |
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! |
217 |
||
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handlerBlock:aOneArgBlock |
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"set the handlerblock - this will be evaluated with the exception |
622 | 220 |
object as argument, if no #handle:do: context was found on the stack." |
159 | 221 |
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622 | 222 |
handlerBlock := aOneArgBlock |
223 |
! |
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159 | 224 |
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622 | 225 |
mayProceed |
226 |
"return the signals ability to proceed. |
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This flag is (currently) not checked by the system; |
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be prepared for changes here, to eventually have nonProceedable |
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signals refuse to let you continue execution." |
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1 | 230 |
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622 | 231 |
^ mayProceed |
1 | 232 |
! |
233 |
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234 |
mayProceed:aBoolean |
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"set/clear the signals ability to proceed. |
419 | 236 |
This flag is (currently) not checked by the system; |
237 |
be prepared for changes here, to eventually have nonProceedable |
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signals refuse to let you continue execution." |
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1 | 239 |
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mayProceed := aBoolean |
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! |
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242 |
||
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nameClass:aClass message:aSelector |
244 |
"this sets the class & selector of a method which returns |
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that signal - this is simply for documentation purposes - |
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see Signal>>printOn: implementation. |
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(took me a while to find that one out ;-)" |
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419 | 248 |
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622 | 249 |
nameClass := aClass. |
250 |
message := aSelector |
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419 | 251 |
! |
252 |
||
622 | 253 |
notifierString |
254 |
"return the notifier string" |
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159 | 255 |
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622 | 256 |
^ notifierString |
257 |
! |
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258 |
||
259 |
notifierString:aString |
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260 |
"set the notifier string" |
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261 |
||
262 |
notifierString := aString |
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159 | 263 |
! |
264 |
||
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originalSignal |
266 |
"return the signal/exception which was originally raised. |
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267 |
For noHandler, that is my unhandled signal; for others, thats the exception itself." |
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268 |
||
269 |
^ self. |
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270 |
! |
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271 |
||
159 | 272 |
parent |
273 |
"return the parent-signal of the receiver" |
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274 |
||
275 |
^ parent |
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276 |
! |
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277 |
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parent:aSignal |
622 | 279 |
"set the parent-signal of the receiver." |
280 |
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281 |
parent := aSignal |
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! |
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parent:aSignal mayProceed:aBoolean |
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"set the parent-signal and the mayProceed flag of the receiver." |
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3010 | 287 |
parent := aSignal. |
288 |
mayProceed := aBoolean. |
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"Modified: 8.10.1997 / 11:56:11 / cg" |
622 | 291 |
! ! |
292 |
||
5835 | 293 |
!Signal methodsFor:'converting'! |
294 |
||
8239 | 295 |
, anExceptionHandler |
296 |
"return a SignalSet with myself and anExceptionHandler" |
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5835 | 297 |
|
8239 | 298 |
^ SignalSet with:self with:anExceptionHandler |
5835 | 299 |
! ! |
300 |
||
622 | 301 |
!Signal methodsFor:'copying'! |
302 |
||
10953 | 303 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
622 | 304 |
"raise an error - deepCopy is not allowed for signals" |
1 | 305 |
|
622 | 306 |
^ self deepCopyError |
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must catch #deppCopyUsing: instead of #deepCopy.
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308 |
"Created: / 31.3.1998 / 15:43:01 / cg" |
622 | 309 |
! ! |
310 |
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!Signal methodsFor:'exception creation'! |
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newException |
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"{ Pragma: +inlineNew }" |
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315 |
"answer a new exception object for this signal. |
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Subclasses may redefine this method" |
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15239 | 318 |
^ Exception basicNew creator:self |
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changeset
|
319 |
|
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parents:
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diff
changeset
|
320 |
"Created: / 26.2.1998 / 19:53:56 / stefan" |
38aa963476a5
Support for Block>>#on:do:on:do:
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parents:
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diff
changeset
|
321 |
"Modified: / 23.7.1999 / 13:41:00 / stefan" |
38aa963476a5
Support for Block>>#on:do:on:do:
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parents:
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diff
changeset
|
322 |
! ! |
38aa963476a5
Support for Block>>#on:do:on:do:
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parents:
8384
diff
changeset
|
323 |
|
622 | 324 |
!Signal methodsFor:'instance creation'! |
1 | 325 |
|
622 | 326 |
newSignal |
327 |
"create a new signal, using the receiver as a prototype and |
|
328 |
setting the parent of the new signal to the receiver." |
|
1 | 329 |
|
3010 | 330 |
^ (self copy) parent:self |
3004
220af5090ec2
added the genericSignal for PP compatiblity
Claus Gittinger <cg@exept.de>
parents:
2893
diff
changeset
|
331 |
|
220af5090ec2
added the genericSignal for PP compatiblity
Claus Gittinger <cg@exept.de>
parents:
2893
diff
changeset
|
332 |
"Modified: 8.10.1997 / 11:53:06 / cg" |
70 | 333 |
! |
334 |
||
622 | 335 |
newSignalMayProceed:aBoolean |
336 |
"create a new signal, using the receiver as a prototype and |
|
337 |
setting the parent of the new signal to the receiver." |
|
362 | 338 |
|
3010 | 339 |
^ (self copy) parent:self mayProceed:aBoolean |
70 | 340 |
|
3004
220af5090ec2
added the genericSignal for PP compatiblity
Claus Gittinger <cg@exept.de>
parents:
2893
diff
changeset
|
341 |
"Modified: 8.10.1997 / 11:57:13 / cg" |
1 | 342 |
! ! |
343 |
||
5570 | 344 |
!Signal methodsFor:'printing & storing'! |
159 | 345 |
|
4563 | 346 |
description |
347 |
"return the notifier string. |
|
348 |
If the notifier string starts with space, prepend |
|
349 |
the parents notifier string" |
|
350 |
||
6116 | 351 |
|s| |
352 |
||
4563 | 353 |
notifierString isNil ifTrue:[ |
16562 | 354 |
^ parent description |
5949 | 355 |
]. |
6116 | 356 |
s := notifierString asString. |
357 |
(s startsWith:Character space) ifTrue:[ |
|
16562 | 358 |
^ parent description, s |
5949 | 359 |
]. |
6116 | 360 |
^ s |
4563 | 361 |
|
362 |
" |
|
8292 | 363 |
Error description |
4563 | 364 |
" |
365 |
||
366 |
"Modified: / 12.3.1998 / 15:04:41 / stefan" |
|
367 |
! |
|
368 |
||
14961 | 369 |
descriptionForDebugger |
16562 | 370 |
"return the description string of the signal which is used in the |
14961 | 371 |
debugger title area" |
372 |
||
373 |
^ self description. |
|
374 |
! |
|
375 |
||
159 | 376 |
printOn:aStream |
377 |
"append a printed representation of the receiver on aStream" |
|
378 |
||
379 |
nameClass notNil ifTrue:[ |
|
16562 | 380 |
nameClass isBehavior ifTrue:[ |
381 |
aStream nextPutAll:nameClass name. |
|
382 |
] ifFalse:[ |
|
383 |
nameClass printOn:aStream. |
|
384 |
]. |
|
385 |
aStream space. |
|
386 |
aStream nextPutAll:message. |
|
387 |
^ self |
|
159 | 388 |
]. |
389 |
^ super printOn:aStream |
|
390 |
! ! |
|
391 |
||
622 | 392 |
!Signal methodsFor:'queries'! |
393 |
||
394 |
accepts:aSignal |
|
395 |
"return true, if the receiver accepts the argument, aSignal. |
|
396 |
(i.e. the receiver is aSignal or a parent of it). False otherwise." |
|
397 |
||
398 |
|s| |
|
399 |
||
4527 | 400 |
self == aSignal ifTrue:[^ true]. |
622 | 401 |
aSignal isQuerySignal ifTrue:[^ false]. |
402 |
||
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
403 |
s := aSignal parent. |
622 | 404 |
[s notNil] whileTrue:[ |
16562 | 405 |
self == s ifTrue:[^ true]. |
406 |
s := s parent |
|
622 | 407 |
]. |
408 |
^ false |
|
4438 | 409 |
|
410 |
"Modified: / 22.3.1999 / 12:45:42 / stefan" |
|
622 | 411 |
! |
412 |
||
10776 | 413 |
catchInDebugger |
414 |
"if set, the debugger will handle this signal in its event loop and will close itself |
|
415 |
without asking for close-confirmation. |
|
416 |
This allows for debugged processes to be terminated without a user confirmation dialog |
|
417 |
(for now, this is used in expecco's hard-terminate function to shut down any open debuggers |
|
418 |
together with the test-process)" |
|
419 |
||
420 |
^ false |
|
421 |
! |
|
422 |
||
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
423 |
exceptionHandlerFor:anException in:aContext |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
424 |
"answer the exceptionHandler for anException from aContext." |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
425 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
426 |
^ self |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
427 |
! |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
428 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
429 |
handlerForSignal:signal context:theContext originator:originator |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
430 |
"answer the handler block for the signal from originator. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
431 |
The block is retrieved from aContext. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
432 |
Answer nil if the signal is not handled" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
433 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
434 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
435 |
(theContext selector ~~ #'handle:from:do:' |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
436 |
or:[(theContext argAt:2) == originator]) ifTrue:[ |
16562 | 437 |
(self == signal or:[self accepts:signal]) ifTrue:[ |
438 |
^ (theContext argAt:1) ? [nil] |
|
439 |
] |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
440 |
]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
441 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
442 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
443 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
444 |
"Created: / 25.7.1999 / 19:55:43 / stefan" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
445 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
446 |
|
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
447 |
handlerProtectedBlock:doBlock inContext:context |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
448 |
"set the handlerProtectedBlock in context" |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
449 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
450 |
context selector == #handle:do: ifTrue:[ |
16562 | 451 |
context argAt:2 put:doBlock. |
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
452 |
] ifFalse:[context selector == #handle:from:do: ifTrue:[ |
16562 | 453 |
context argAt:3 put:doBlock. |
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
454 |
]]. |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
455 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
456 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
457 |
|
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
458 |
! |
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
459 |
|
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
460 |
handles:anException |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
461 |
"return true, if the receiver handles the argument, anException. |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
462 |
(i.e. the receiver is anExceptions signal or a parent of it)" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
463 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
464 |
|signal| |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
465 |
|
15113
20b7764bc56a
use #creator instead of #signal
Claus Gittinger <cg@exept.de>
parents:
14961
diff
changeset
|
466 |
signal := anException creator. |
4473
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
467 |
|
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
468 |
self == signal ifTrue:[^ true]. "quick check" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
469 |
anException isNotification ifTrue:[^ false]. "speed up queries by not traversing the parent chain" |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
470 |
|
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
471 |
[(signal := signal parent) notNil] whileTrue:[ |
16562 | 472 |
self == signal ifTrue:[^ true]. |
8681
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
473 |
]. |
38aa963476a5
Support for Block>>#on:do:on:do:
Stefan Vogel <sv@exept.de>
parents:
8384
diff
changeset
|
474 |
^ false |
4473
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
475 |
! |
793078981f01
added #handlingSignalInContext:
Claus Gittinger <cg@exept.de>
parents:
4466
diff
changeset
|
476 |
|
622 | 477 |
inheritsFrom:anotherSignal |
478 |
"return true, if the receiver is a child of anotherSignal |
|
479 |
(i.e. if handling anotherSignal also handles the receiver) |
|
480 |
This is almost the same as accepts, but returns false, if |
|
481 |
the receiver is identical to anotherSignal." |
|
482 |
||
9271
6be3fa0ab53d
inheritsFrom: should not be used/redefined in the exception
Claus Gittinger <cg@exept.de>
parents:
9180
diff
changeset
|
483 |
<resource: #obsolete> |
6be3fa0ab53d
inheritsFrom: should not be used/redefined in the exception
Claus Gittinger <cg@exept.de>
parents:
9180
diff
changeset
|
484 |
|
622 | 485 |
self == anotherSignal ifTrue:[^ false]. |
486 |
^ anotherSignal accepts:self |
|
3521
4d83701cfc28
care for nil receiver in #isHandledIn:
Claus Gittinger <cg@exept.de>
parents:
3348
diff
changeset
|
487 |
|
4d83701cfc28
care for nil receiver in #isHandledIn:
Claus Gittinger <cg@exept.de>
parents:
3348
diff
changeset
|
488 |
"Modified: / 6.6.1998 / 20:37:47 / cg" |
622 | 489 |
! |
490 |
||
6200 | 491 |
isControlInterrupt |
492 |
^ false |
|
493 |
||
494 |
"Created: / 16.11.2001 / 16:12:20 / cg" |
|
495 |
! |
|
496 |
||
6631
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
497 |
isExceptionCreator |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
498 |
"return true, if the receiver can create exceptions, |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
499 |
this includes #raise, #raiseRequest as well as the behavior of |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
500 |
an exception handler, such as the #accepts: and #handles: messages" |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
501 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
502 |
^ true |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
503 |
! |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
504 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
505 |
isExceptionHandler |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
506 |
"return true, if the receiver responds to the exception handler protocol, |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
507 |
especially to the #accepts: and #handles: messages" |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
508 |
|
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
509 |
^ true |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
510 |
! |
5ffa1ce7b2cc
#isExceptionCreator instead of #isSignal
Stefan Vogel <sv@exept.de>
parents:
6518
diff
changeset
|
511 |
|
622 | 512 |
isHandled |
513 |
"return true, if there is a handler for the receiver signal. |
|
514 |
Raising an unhandled signal will usually lead into the debugger, |
|
2689 | 515 |
but can be caught globally by setting Exceptions EmergencyHandler." |
622 | 516 |
|
4676 | 517 |
^ GenericException exception:self isHandledIn:(thisContext sender). |
622 | 518 |
! |
519 |
||
520 |
isHandledIn:aContext |
|
16562 | 521 |
"return true, if there is a handler for the receiver signal in the |
622 | 522 |
contextChain starting with aContext." |
523 |
||
4676 | 524 |
^ GenericException exception:self isHandledIn:aContext |
622 | 525 |
! |
526 |
||
527 |
isQuerySignal |
|
1249 | 528 |
"return true, if this is a querySignal - always return false here" |
529 |
||
622 | 530 |
^ false |
1249 | 531 |
|
532 |
"Modified: 22.4.1996 / 13:45:06 / cg" |
|
622 | 533 |
! ! |
534 |
||
535 |
!Signal methodsFor:'raising'! |
|
536 |
||
537 |
raise |
|
4438 | 538 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
539 |
The signals notifierString is used as messageText." |
622 | 540 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
541 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
542 |
|
13010 | 543 |
^ self newException |
16562 | 544 |
raiseIn:thisContext sender |
1326 | 545 |
|
13010 | 546 |
"Created: / 23-07-1999 / 14:07:17 / stefan" |
547 |
"Modified: / 10-08-2010 / 09:58:57 / cg" |
|
622 | 548 |
! |
549 |
||
550 |
raiseErrorString:aString |
|
1326 | 551 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
552 |
The argument is used as messageText." |
622 | 553 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
554 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
555 |
|
13010 | 556 |
^ self newException |
16562 | 557 |
raiseErrorString:aString in:thisContext sender |
1326 | 558 |
|
13010 | 559 |
"Created: / 23-07-1999 / 14:07:33 / stefan" |
560 |
"Modified: / 10-08-2010 / 09:59:22 / cg" |
|
622 | 561 |
! |
562 |
||
5685 | 563 |
raiseErrorString:aString in:aContext |
564 |
"raise a signal nonproceedable. |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
565 |
The argument is used as messageText." |
5685 | 566 |
|
567 |
<context: #return> |
|
568 |
||
13010 | 569 |
^ self newException |
16562 | 570 |
raiseErrorString:aString in:aContext |
5685 | 571 |
|
13010 | 572 |
"Created: / 23-07-1999 / 14:07:33 / stefan" |
573 |
"Modified: / 10-08-2010 / 09:59:58 / cg" |
|
5685 | 574 |
! |
575 |
||
16562 | 576 |
raiseFrom:something |
1326 | 577 |
"raise a signal nonproceedable. |
4438 | 578 |
The argument, something is passed both as parameter and originator." |
16562 | 579 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
580 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
581 |
|
8730 | 582 |
^ (self newException |
16562 | 583 |
suspendedContext:(thisContext sender) parameter:something originator:something) |
584 |
raise |
|
1326 | 585 |
|
13010 | 586 |
"Created: / 23-07-1999 / 14:07:59 / stefan" |
587 |
"Modified: / 10-08-2010 / 09:58:36 / cg" |
|
622 | 588 |
! |
589 |
||
590 |
raiseRequest |
|
1326 | 591 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
592 |
The signals notifierString is used as messageText." |
622 | 593 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
594 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
595 |
|
13010 | 596 |
^ self newException |
16562 | 597 |
raiseRequestIn:thisContext sender |
1326 | 598 |
|
13010 | 599 |
"Created: / 23-07-1999 / 14:08:24 / stefan" |
600 |
"Modified: / 10-08-2010 / 10:00:13 / cg" |
|
622 | 601 |
! |
602 |
||
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
603 |
raiseRequestErrorString:aString |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
604 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
605 |
The argument, aString is used as messageText." |
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
606 |
|
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
607 |
<context: #return> |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
608 |
|
13010 | 609 |
^ self newException |
16562 | 610 |
raiseRequestErrorString:aString in:thisContext sender |
13010 | 611 |
|
612 |
"Modified: / 10-08-2010 / 10:00:40 / cg" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
613 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
614 |
|
16562 | 615 |
raiseRequestFrom:something |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
616 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
617 |
The argument, something is passed both as parameter and originator." |
16562 | 618 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
619 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
620 |
|
8730 | 621 |
^ (self newException |
16562 | 622 |
suspendedContext:(thisContext sender) parameter:something originator:something) |
623 |
raiseRequest |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
624 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
625 |
"Modified: / 2.5.1996 / 16:36:38 / cg" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
626 |
"Modified: / 5.3.1998 / 16:52:46 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
627 |
"Created: / 23.7.1999 / 14:08:36 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
628 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
629 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
630 |
raiseRequestWith:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
631 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
632 |
The signals notifierString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
633 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
634 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
635 |
|
13010 | 636 |
^ self newException |
16562 | 637 |
raiseRequestWith:aParameter in:thisContext sender |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
638 |
|
13010 | 639 |
"Created: / 23-07-1999 / 14:08:48 / stefan" |
640 |
"Modified: / 10-08-2010 / 10:01:00 / cg" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
641 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
642 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
643 |
raiseRequestWith:aParameter errorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
644 |
"raise a signal proceedable. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
645 |
The argument, aString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
646 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
647 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
648 |
|
13010 | 649 |
^ self newException |
16562 | 650 |
raiseRequestWith:aParameter errorString:aString in:thisContext sender |
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
651 |
|
13010 | 652 |
"Created: / 23-07-1999 / 14:08:57 / stefan" |
653 |
"Modified: / 10-08-2010 / 10:01:38 / cg" |
|
4759
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
654 |
! |
99d883e67ec9
added #raiseRequestErrorString
Claus Gittinger <cg@exept.de>
parents:
4676
diff
changeset
|
655 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
656 |
raiseRequestWith:aParameter errorString:aString in:aContext |
3103 | 657 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
658 |
The argument, aString is used as messageText. |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
659 |
The additional context is passed as the context responsible for the raise, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
660 |
allowing a raise to mimicri the exception happened somewhere else." |
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
661 |
|
8732 | 662 |
<context: #return> |
663 |
||
13010 | 664 |
^ self newException |
16562 | 665 |
raiseRequestWith:aParameter errorString:aString in:aContext |
3103 | 666 |
|
13010 | 667 |
"Created: / 23-07-1999 / 14:09:07 / stefan" |
668 |
"Modified: / 10-08-2010 / 10:02:08 / cg" |
|
3103 | 669 |
! |
670 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
671 |
raiseRequestWith:aParameter in:aContext |
1326 | 672 |
"raise a signal proceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
673 |
The additional context is passed as the context responsible for the raise, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
674 |
allowing a raise to mimicri the exception happened somewhere else." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
675 |
|
8732 | 676 |
<context: #return> |
677 |
||
13010 | 678 |
^ self newException |
16562 | 679 |
raiseRequestWith:aParameter in:aContext |
13010 | 680 |
|
681 |
"Modified: / 10-08-2010 / 10:02:26 / cg" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
682 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
683 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
684 |
raiseSignal |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
685 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
686 |
The signals notifierString is used as messageText." |
622 | 687 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
688 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
689 |
|
8730 | 690 |
^ (self newException |
16562 | 691 |
suspendedContext:thisContext sender) |
692 |
raiseSignal |
|
1326 | 693 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
694 |
"Modified: / 10.11.2001 / 15:13:34 / cg" |
622 | 695 |
! |
696 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
697 |
raiseSignal:errorMessage |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
698 |
"ANSI: raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
699 |
The argument, errorMessage is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
700 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
701 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
702 |
|
8730 | 703 |
^ (self newException |
16562 | 704 |
suspendedContext:(thisContext sender) errorString:errorMessage) |
705 |
raiseSignal. |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
706 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
707 |
"Modified: / 07-08-2004 / 19:24:00 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
708 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
709 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
710 |
raiseSignal:errorMessage with:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
711 |
"ANSI: raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
712 |
The argument, errorMessage is used as messageText." |
622 | 713 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
714 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
715 |
|
8730 | 716 |
^ (self newException |
16562 | 717 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:errorMessage) |
718 |
raiseSignal. |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
719 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
720 |
"Modified: / 07-08-2004 / 19:10:40 / stefan" |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
721 |
! |
1326 | 722 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
723 |
raiseSignalErrorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
724 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
725 |
The argument, aString is used as messageText." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
726 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
727 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
728 |
|
8730 | 729 |
^ (self newException |
16562 | 730 |
suspendedContext:(thisContext sender) errorString:aString) |
731 |
raiseSignal. |
|
622 | 732 |
! |
733 |
||
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
734 |
raiseSignalWith:aParameter |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
735 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
736 |
The argument, aParameter is passed as parameter." |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
737 |
|
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
738 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
739 |
|
8730 | 740 |
^ (self newException |
16562 | 741 |
suspendedContext:(thisContext sender) parameter:aParameter) |
742 |
raiseSignal. |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
743 |
! |
622 | 744 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
745 |
raiseSignalWith:aParameter errorString:aString |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
746 |
"raise a signal (proceedable or not, whatever the proceedability is). |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
747 |
The argument, aString is used as messageText, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
748 |
aParameter is passed as exception parameter." |
1326 | 749 |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
750 |
<context: #return> |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
751 |
|
8730 | 752 |
^ (self newException |
16562 | 753 |
suspendedContext:(thisContext sender) parameter:aParameter errorString:aString) |
754 |
raiseSignal. |
|
622 | 755 |
! |
756 |
||
757 |
raiseWith:aParameter |
|
1326 | 758 |
"raise a signal nonproceedable. |
4438 | 759 |
The argument, aParameter is passed as parameter." |
622 | 760 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
761 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
762 |
|
13010 | 763 |
^ self newException |
16562 | 764 |
raiseWith:aParameter in:thisContext sender |
1326 | 765 |
|
13010 | 766 |
"Created: / 23-07-1999 / 14:09:27 / stefan" |
767 |
"Modified: / 10-08-2010 / 10:02:51 / cg" |
|
622 | 768 |
! |
769 |
||
770 |
raiseWith:aParameter errorString:aString |
|
4438 | 771 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
772 |
The argument, aString is used as messageText, |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
773 |
aParameter is passed as exception parameter." |
622 | 774 |
|
4555
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
775 |
<context: #return> |
892c4529acf2
cleaned up suspendedContext passing.
Claus Gittinger <cg@exept.de>
parents:
4554
diff
changeset
|
776 |
|
13010 | 777 |
^ self newException |
16562 | 778 |
raiseWith:aParameter errorString:aString in:thisContext sender |
1326 | 779 |
|
13010 | 780 |
"Created: / 23-07-1999 / 14:09:36 / stefan" |
781 |
"Modified: / 10-08-2010 / 10:03:29 / cg" |
|
1326 | 782 |
! |
783 |
||
784 |
raiseWith:aParameter errorString:aString in:aContext |
|
4438 | 785 |
"raise a signal nonproceedable. |
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
786 |
The argument, aString is used as messageText, aParameter is passed |
1608 | 787 |
as exception parameter. |
788 |
The additional context is passed as the context responsible for the raise, |
|
789 |
allowing a raise to mimicri the exception happened somewhere else." |
|
790 |
||
8732 | 791 |
<context: #return> |
792 |
||
13010 | 793 |
^ self newException |
16562 | 794 |
raiseWith:aParameter errorString:aString in:aContext |
1326 | 795 |
|
13010 | 796 |
"Created: / 23-07-1999 / 14:09:46 / stefan" |
797 |
"Modified: / 10-08-2010 / 10:03:19 / cg" |
|
8685
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
798 |
! |
06c1d82512f5
QuerySignal generates Notifications instead of Exceptions.
Stefan Vogel <sv@exept.de>
parents:
8681
diff
changeset
|
799 |
|
9180 | 800 |
raiseWith:aParameter in:aContext |
801 |
"raise a signal nonproceedable. |
|
802 |
The argument, aParameter is passed as parameter. |
|
803 |
The additional context is passed as the context responsible for the raise, |
|
804 |
allowing a raise to mimicri the exception happened somewhere else." |
|
805 |
||
806 |
<context: #return> |
|
807 |
||
13010 | 808 |
^ self newException |
16562 | 809 |
raiseWith:aParameter in:aContext |
13010 | 810 |
|
811 |
"Modified: / 10-08-2010 / 10:03:05 / cg" |
|
622 | 812 |
! ! |
813 |
||
1 | 814 |
!Signal methodsFor:'save evaluation'! |
815 |
||
622 | 816 |
catch:aBlock |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
817 |
"evaluate the argument, aBlock. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
818 |
If the receiver-signal is raised during evaluation, abort |
16562 | 819 |
the evaluation and return true; otherwise return false. |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
820 |
This is the catch & throw mechanism found in other languages, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
821 |
where the returned value indicates if an exception occured." |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
822 |
|
9079 | 823 |
|raiseOccurred| |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
824 |
|
9079 | 825 |
raiseOccurred := false. |
826 |
self handle:[:ex | raiseOccurred := true. ex return] do:aBlock. |
|
827 |
^ raiseOccurred |
|
622 | 828 |
|
9079 | 829 |
" |
830 |
Object messageNotUnderstoodSignal catch:[ |
|
16562 | 831 |
123 size open |
9079 | 832 |
] |
833 |
" |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
834 |
! |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
835 |
|
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
836 |
deferAfter:aBlock |
12006 | 837 |
" evaluate the argument, aBlock. |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
838 |
Ignore the receiver-signal during evaluation - i.e. simply continue, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
839 |
but remember if the signal was raised. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
840 |
After the block evaluation, finally raise the signal - if it was raised in the block. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
841 |
If the signal is raised multiple times, only the first raises parameter is remembered, |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
842 |
and only a single raise is performed after the blocks evaluation. |
622 | 843 |
|
16562 | 844 |
Deferring makes sense for some signals, such as UserInterrupt or AbortSignal, |
845 |
which must occasionally be delayed temporarily until a save place is reached |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
846 |
(especially when packages are sent across a communication channel, and you dont want |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
847 |
partial packages to be generated by user interruptions)." |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
848 |
|
16562 | 849 |
|caughtException result| |
622 | 850 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
851 |
self handle:[:ex | |
16562 | 852 |
caughtException isNil ifTrue:[ |
853 |
caughtException := ex. |
|
854 |
]. |
|
855 |
ex proceedWith:nil |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
856 |
] do:[ |
16562 | 857 |
result := aBlock value. |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
858 |
]. |
16562 | 859 |
caughtException notNil ifTrue:[ |
860 |
caughtException suspendedContext:thisContext. |
|
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
861 |
|
16562 | 862 |
"/ the signal was raised during the execution of aBlock above. |
863 |
"/ Raise it now (delayed). |
|
864 |
caughtException raiseSignal |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
865 |
]. |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
866 |
^ result |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
867 |
|
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
868 |
" |
6429
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
869 |
|s| |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
870 |
|
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
871 |
s := Signal new mayProceed:true. |
d0a5a78e6227
better impl. of #deferAfter:
Claus Gittinger <cg@exept.de>
parents:
6396
diff
changeset
|
872 |
s deferAfter:[ |
16562 | 873 |
s raiseRequestWith:'hello' errorString:'eeee' |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
874 |
] |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
875 |
" |
622 | 876 |
! |
877 |
||
12062 | 878 |
evaluate:aBlock ifRaised:exceptionValue |
879 |
"evaluate the argument, aBlock and return its value. |
|
880 |
If the receiver-signal is raised during evaluation, abort |
|
16562 | 881 |
the evaluation and return the value from exceptionValue. |
12062 | 882 |
This is similar to the catch & throw mechanism found in other languages" |
883 |
||
884 |
^ self handle:[:ex | exceptionValue value] do:aBlock. |
|
885 |
||
886 |
" |
|
16562 | 887 |
Object messageNotUnderstoodSignal |
888 |
evaluate:[ 123 size open ] |
|
889 |
ifRaised:[ self halt ] |
|
12062 | 890 |
" |
891 |
! |
|
892 |
||
1 | 893 |
handle:handleBlock do:aBlock |
894 |
"evaluate the argument, aBlock. |
|
895 |
If the receiver-signal is raised during evaluation, |
|
896 |
evaluate the handleBlock passing it an Exception argument. |
|
897 |
The handler may decide how to react to the signal by sending |
|
898 |
a corresponding message to the exception (see there). |
|
899 |
If the signal is not raised, return the value of evaluating |
|
900 |
aBlock." |
|
901 |
||
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
902 |
<context: #return> |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
903 |
<exception: #handle> |
95 | 904 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
905 |
"/ thisContext markForHandle. -- same as above pragma |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
906 |
^ aBlock value "the real logic is in Exception>>doRaise" |
120 | 907 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
908 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
909 |
Object messageNotUnderstoodSignal handle:[:ex | |
16562 | 910 |
'oops' printNL. |
911 |
ex return |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
912 |
] do:[ |
16562 | 913 |
123 size open |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
914 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
915 |
" |
95 | 916 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
917 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
918 |
|num| |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
919 |
|
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
920 |
num := 0. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
921 |
Number divisionByZeroSignal handle:[:ex | |
16562 | 922 |
'oops' printNL. |
923 |
ex return |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
924 |
] do:[ |
16562 | 925 |
123 / num |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
926 |
] |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
927 |
" |
4438 | 928 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
929 |
"Modified: / 25.7.1999 / 19:43:01 / stefan" |
44 | 930 |
! |
931 |
||
362 | 932 |
handle:handleBlock from:anObject do:aBlock |
933 |
"evaluate the argument, aBlock. |
|
934 |
If the receiver-signal is raised during evaluation, |
|
935 |
and the exception originated from anObject, |
|
936 |
evaluate the handleBlock passing it an Exception argument. |
|
937 |
The handler may decide how to react to the signal by sending |
|
938 |
a corresponding message to the exception (see there). |
|
939 |
If the signal is not raised, return the value of evaluating |
|
940 |
aBlock." |
|
941 |
||
4547
082a2f7d9d8e
Add #handlerProtectedBlock:inContext
Stefan Vogel <sv@exept.de>
parents:
4540
diff
changeset
|
942 |
<context: #return> |
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
943 |
<exception: #handle> |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
944 |
|
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
945 |
"/ thisContext markForHandle. -- same as above pragma |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
946 |
^ aBlock value "the real logic is in Exception>>doRaise" |
362 | 947 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
948 |
" |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
949 |
the first open will be caught; the second not: |
362 | 950 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
951 |
|o1 o2| |
362 | 952 |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
953 |
o1 := 123. |
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
954 |
o2 := nil. |
16562 | 955 |
Object messageNotUnderstoodSignal |
956 |
handle: |
|
957 |
[:ex | |
|
958 |
'oops' printNL. |
|
959 |
ex proceed |
|
960 |
] |
|
961 |
from:o1 |
|
962 |
do: |
|
963 |
[ |
|
964 |
o1 open. |
|
965 |
o2 open |
|
966 |
] |
|
4491
5041cae5651c
use new pragma to flag exception frames.
Claus Gittinger <cg@exept.de>
parents:
4486
diff
changeset
|
967 |
" |
4438 | 968 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4440
diff
changeset
|
969 |
"Modified: / 25.7.1999 / 19:43:40 / stefan" |
362 | 970 |
! |
971 |
||
419 | 972 |
ignoreIn:aBlock |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
973 |
"evaluate the argument, aBlock. |
16562 | 974 |
Ignore the receiver-signal during evaluation - i.e. simply continue. |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
975 |
This makes only sense for some signals, such as UserInterrupt |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
976 |
or AbortSignal, because continuing after an exception without any cleanup |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
977 |
often leads to followup-errors." |
159 | 978 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
979 |
^ self handle:[:ex | ex proceedWith:nil] do:aBlock. |
159 | 980 |
|
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
981 |
" |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
982 |
Object messageNotUnderstoodSignal ignoreIn:[ |
16562 | 983 |
123 size open |
6396
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
984 |
] |
74d5b0b588a6
added deferAfter: - defer exceptions until some later time
Claus Gittinger <cg@exept.de>
parents:
6200
diff
changeset
|
985 |
" |
1 | 986 |
! ! |
987 |
||
2207 | 988 |
!Signal class methodsFor:'documentation'! |
1249 | 989 |
|
990 |
version |
|
16562 | 991 |
^ '$Header: /cvs/stx/stx/libbasic/Signal.st,v 1.115 2014-06-10 10:20:23 cg Exp $' |
12062 | 992 |
! |
993 |
||
994 |
version_CVS |
|
16562 | 995 |
^ '$Header: /cvs/stx/stx/libbasic/Signal.st,v 1.115 2014-06-10 10:20:23 cg Exp $' |
1249 | 996 |
! ! |