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[REBOL] Re: Centralise error trapping in REBOL/View applications

From: lmecir:mbox:vol:cz at: 16-Aug-2007 18:19

Rudolf W. MEIJER napsal(a):
> I appreciate all the comments received on my suggestion, but would like > to > say that my point was twofold: to highlight the manipulation ability of > REBOL, allowing to dynamically compute a function name [handler: get > to-word > join "handle-" suffix]
to dynamically compute a function name - it is of little advantage in this case, when the name of the function to call is known
> and the more accurate error-logging that is made > possible by trapping errors at handler level rather than at <view > layout> > level.
error logging accuracy - did you find any interesting difference?
> BTW, if one wants to have the equivqalent of [try [view layout]] > with > RebGUI, where the windows application is started by [display title > window] > followed by [do-events], I suppose the trap is on the latter function: > [[try > [do-events]]. Right? > > Rudolf Meijer
Try [do-events] is possible, but a more flexible way is to change the implementation of the Do-events function to suit your needs, example: do-events-with-error-handling: func [ { Usage: view/new my-layout do-events-with-error-handling :my-error-handler } handle-error [function!] { Error handling function. Arguments: error [error!] - the error that is being handled Return value: True - stop handling events False - continue handling events } ] [ until [handle-error try [return wait []]] ] -L