Статические члены класса

Для статических членов класса предусмотрены конструкции:

* class var
* class procedure
* class function
* class property

type
  TSomeClass = class
  private
    type
      TSomeType = type integer;    // an internal type
    class var
      FSomeClassVar: TSomeType;    // class variable belongs to a class, not an instance
    var
      FSomeIntanceVar: TSomeType;  // instance variable belongs to instance. it is a usual field
    class procedure SetSomeClassVar(const AValue: TSomeType); static;
  public
    class property SomeProperty: TSomeType read FSomeClassVar write SetSomeClassVar; // class property - belongs to a class
    property SomeInstanceProp: TSomeType read FSomeIntanceVar;
  end;
 
{ TSomeClass }
 
class procedure TSomeClass.SetSomeClassVar(const AValue: TSomeType);
begin
   FSomeClassVar := AValue;
end;
 
var
  SomeClass: TSomeClass;
begin
  SomeClass.SomeProperty := 1;
  WriteLn(SomeClass.SomeProperty);
end.