[sv-ec]

In section 7.19 Abstract classes and virtual methods

The example does not match the description

 

virtual class BasePacket;

virtual function integer send(bit[31:0] data);

endfunction

endclass

class EtherPacket extends BasePacket;

function integer send(bit[31:0] data);

// body of the function

...

endfunction

endclass

 

 

The virtual method send in Basepacket does have body, it's just empty.
The example should have been

 

virtual class BasePacket;

extern virtual function integer send(bit[31:0] data);

endclass

class EtherPacket extends BasePacket;

function integer send(bit[31:0] data);

// body of the function

...

endfunction

endclass

 

 

David Rich
Verification Technologist
Design Verification & Test Division
Mentor Graphics Corporation
dave_rich@mentor.com
Office:   408 487-7206
Cell:     510 589-2625