2012/12/4 Marcos Douglas <m...@delfire.net> > On Tue, Dec 4, 2012 at 4:53 PM, Sven Barth <pascaldra...@googlemail.com> > wrote: > > On 04.12.2012 20:03, Marcos Douglas wrote: > >> > >> Hi, > >> > >> See the code below. > >> My question is: Why the cast worked, considering the c variable is a > >> TAClass instance, not a TBClass. > > > > > > As long as you don't access fields of TBClass inside of GetInfoA you > won't > > run into problems, because FInfoA is accessed using an offset. If you > want > > to catch such problems you should compile with "-CR". The output will > then > > look like the following: > > > > === output begin === > > > > An unhandled exception occurred at $080482E8 : > > EInvalidCast : Invalid type cast > > $080482E8 > > > > === output end === > > > > As a sidenote: as long as you don't access an object member at all you'd > > even be able to cast a primitive type like Integer to an object and call > > methods on it... (not that I'd suggest to do this... ;) ) > > > > Regards, > > Sven > > Excellent explanation, thank you. > > Marcos Douglas
This is witchcraft! :) -- Silvio Clécio My public projects - github.com/silvioprog
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