Re: [DUG]: Delphi shared class data members?

[Matt Dee]

In the unit the Class is defined, have a variable located in the Implementation section that the methods read/write to. Because it's in the Implementation section it's hidden from the outside. The only problem is that any descendents would have to be declared in the same unit, as otherwise they wouldn't have access to it. (That is, the inherited methods from the base class would, but any new methods in the descendents wouldn't.)

(Or put the variable in the Interface section, but then it's no longer private.)

They work like this: a data member is declared as Shared (scope can be specified normally) and all instances of the class and its descendants share the same variable - a bit like having a global with class scope. I can see how they'd be useful in some situations.

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