[Laszlo-dev] DHTML runtime safety vs. efficiency

[P T Withington]

Now that we have fixed http://jira.openlaszlo.org/jira/browse/ 
LPP-8222, by providing a way for errors that a user intentionally  
throws to get past compiler.catcherrors, I propose that  
compiler.catcherrors should default to `true` when you are debugging.   
This will alleviate the need for OL users to resort to the browser  
debugger for debugging their OL code, as the built-in debugger will  
catch, report, and ignore any runtime errors that are not explicitly  
permitted using `#pragma "throwsError=true"`.

My motivation for this proposal is http://jira.openlaszlo.org/jira/browse/LPP-8479 
, were we would remove the runtime overhead of two function calls to  
evaluate any potentially error-signalling reference.

[If you do not default catcherrors to true in the debug case, the  
error will continue to be thrown and will be caught by the browser  
debugger (if any), but that will also result in your program halting,  
making it difficult to debug more than one bug at a time.

Comments?