RE: [sv-ec] Virtual function call from base class constructor

Daniel,

 

The calls to t() are actually this::t(), so it makes sense that you
always get the extended function. Even when you call the constructor for
class A, the handle is of type B, so this::t() expands into B::t().
Here is a more complete example:

 

class A;

   virtual function t;

     $display("base class A");

   endfunction

    

   function new;

      $display("In %m");

      t();        // This should call A::t or B::t because t() is
virtual

      f();

   endfunction

 

    function f();

      $display("In %m");

        t();        // This should call A::t or B::t because t() is
virtual

    endfunction 

endclass

 

class B extends A;

   virtual function t; 

      $display("Extended class B");

   endfunction

 

   function f();

      $display("In %m");

      t();        // this should call B::t bacause t is virtual 

   endfunction

endclass

 

module top;

    

    initial begin

       A a;

       B b;

       $display("\nConstructing A");

       a = new;

       $display("\nCalling a.f()");

       a.f();

       $display("\nCalling a.t()");

       a.t();

 

       $display("\nConstructing B");

       b = new;

       $display("\nCalling b.f()");

       b.f();

       $display("\nCalling b.t()");

       b.t();

    end

endmodule

 

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