[Laszlo-dev] For Review: Change 20071029-dda-s Summary: support try/catch/finally and throw statements in SWF7/8

[Max Carlson]

Approved using this testcase:

<canvas>
     <button>
         <method event="onclick">
             try {
                 throw('foo');
             } catch (e) {
                 Debug.write('exception', e);
             }
         </method>
     </button>
</canvas>

Donald Anderson wrote:
> Change 20071029-dda-s by dda at freddie.local on 2007-10-29 22:24:27 EDT
>     in /Users/dda/laszlo/src/svn/openlaszlo/trunk
>     for http://svn.openlaszlo.org/openlaszlo/trunk
> 
> Summary: support try/catch/finally and throw statements in SWF7/8
> 
> New Features: try/catch/finally supported in SWF7/8.
> 
> Bugs Fixed:  LPP-1539
> 
> Technical Reviewer: ptw
> QA Reviewer: maxcarlson
> Doc Reviewer: (pending)
> 
> Documentation:
> 
> Release Notes:
>     try, catch, finally, throw statements are now supported in SWF7/8 as 
> well as DHTML
>     runtimes.
> 
> Details:
>     try/catch/finally are very helpful in creating a reliable software.
>     It should help in consolidating/maintaining code in the runtime kernel,
>     since DHTML already supports try/catch and we won't need to have
>     alternate implementations of error handling code.
> 
> Tests:
>     created some simple tests using try/catch/finally,
>     also try/catch (no finally).  Had some problems with
>     my try/finally (no catch) example.
>     The only way I've found to trigger an exception
>     in SWF7/8 is to use an explicit throw statement,
>     since the SWF instruction set seems to continue to operate
>     with various kinds of errors.
> 
> Files:
> M      WEB-INF/lps/server/src/org/openlaszlo/sc/Actions.java
> M      WEB-INF/lps/server/src/org/openlaszlo/sc/Instructions.java
> M      WEB-INF/lps/server/src/org/openlaszlo/sc/Assembler.java
> M      WEB-INF/lps/server/src/org/openlaszlo/sc/InstructionCollector.java
> M      WEB-INF/lps/server/src/org/openlaszlo/sc/CodeGenerator.java
> 
> Changeset: http://svn.openlaszlo.org/openlaszlo/patches/20071029-dda-s.tar
> 
> 
> 
> -- 
> 
> Don Anderson
> Java/C/C++, Berkeley DB, systems consultant
> 
> Voice:  617-547-7881
> Email:  dda at ddanderson.com
> WWW:    http://www.ddanderson.com
> 

-- 
Regards,
Max Carlson
OpenLaszlo.org