SV: dynamic casting with cast - complete - EDA Playground
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class parent_trans;
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  bit [31:0] data;
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  int id;
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  function void display();
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    $display("Base: Value of data = %0d, id = %0d", data, id);
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  endfunction
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endclass
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​
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class child_trans extends parent_trans;
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  function void display();
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    $display("Child: Value of data = %0d, id = %0d", data, id);
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  endfunction
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endclass
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​
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module class_example;
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  initial begin
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    parent_trans p_tr;
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    child_trans c_tr;
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    c_tr = new();
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​
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    p_tr = c_tr; // or $cast(p_tr, c_tr);
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    $cast(c_tr, p_tr);
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​
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    p_tr.data = 10;
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    p_tr.id   = 1;
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    c_tr.data = 5;
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    c_tr.id   = 2;
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    c_tr.display();
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  end
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endmodule
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// Code your design here
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Example of dynamic casting - complete

Example of dynamic casting - complete

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