Am 20.08.2013 09:36 schrieb "Antonio Fortuny" <a.fort...@sitasoftware.lu>: > > > Le 20/08/2013 07:34, Xiangrong Fang a écrit : >> >> Hi Flavio, >> >> Your findings confirmed mine, but not telling me why? It seems that the "virtual" keyword has no use at all! To confirm this, I just removed the "inherited" call in TDerived, then re-run the program with or without "virtual/override", the result is exactly same, i.e. with c2 (declared as TBase), the following statements ALWAYS calls constructor of TDerived, NOT TBase: >> >> c2 := TDerived.Create; >> c2 := TBase(TDerived.Create); >> >> This is not same as the description in: http://www.freepascal.org/docs-html/ref/refsu26.html >> >> BTW, the above documents are talking about objects, but I am using classes, is there any difference here? > > Yep: a class is a construct definig a collection of variables, properties and methods whilst an object is an instantiated class.
You are aware that the link mentioned by Xiangrong Fang points to a part of the manual about Turbo Pascal style objects which are different in a different sense to Delphi style objects/classes? Regards, Sven
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