Re: [Gnash-dev] youtube bugs for release

[Michael Fötsch]

strk wrote:
> There are many such cases in Gnash. Gnash is pickier about types
> than the proprietary player. This case should be not too hard to fix,
> probably just change the ensureType to require an as_object should work.

If I understand this correctly, casting to as_object works in this 
particular case because "getURL" only ever invokes methods that are 
defined right in as_object, such as "callMethod" and 
"getURLEncodedVars". It doesn't work in "movieclip_getSWFVersion" 
because that invokes "getSWFVersion", which is defined in class 
"MovieClip". Correct?


However, I don't fully understand when and where the object created in 
ActionScript with "new MovieClip()" ceases to be of type MovieClip*. I 
assume the "new MovieClip()" in ActionScript leads to a "new 
MovieClip()" in C++. Isn't this MovieClip* just being upcasted to 
as_object* (while being the same "this" pointer)? Obviously not, because 
the "dynamic_cast" back to MovieClip* doesn't work. Where in the C++ 
code does the MovieClip lose its MovieClip-ness?  (I know this is a 
basic question, but any insights are greatly appreciated.)

Kind Regards,
M.F.