Cliff, I am going to avoid using the word "interface" here since that has a different meaning in SV and are quite different than a Java "interface". Having some way to "implement" multiple specifications (sets of behaviors) would be a very good idea for SV. There are some issues involving inheritance and type parameters that would become better defined in such a system. This is NOT multiple inheritance (i.e. no object "isa" relationships). I would definitely support some form of "implements" functionality; I would be quite opposed to adding multiple inheritance without a truly compelling rationale. Gord. Clifford E. Cummings wrote: > Hi, All - > > Do we have an SVDB Mantis item for multiple inheritance? And is this the > same or is this slightly different? > > Regards - Cliff > >> X-Virus-Status: clean(F-Secure/fsigk_smtp/488/mailserv98-us) >> To: cliffc@sunburst-design.com >> Subject: SystemVerilog feature request >> X-Mailer: Lotus Notes Release 6.5.3 September 14, 2004 >> From: Paul Butler <paul.butler@ni.com> >> Date: Thu, 30 Nov 2006 14:59:20 -0600 >> X-MIMETrack: Serialize by Router on PostOffice/AUS/M/NIC(Release >> 6.5.5|November 30, 2005) at >> 11/30/2006 02:59:23 PM, >> Serialize complete at 11/30/2006 02:59:23 PM >> X-pstn-levels: (S:64.60140/99.90000 R:95.9108 P:95.9108 M:97.0282 >> C:98.6951 ) >> X-pstn-settings: 5 (2.0000:2.0000) s gt3 gt2 gt1 r p m c >> X-pstn-addresses: from <paul.butler@ni.com> [3717/175] >> >> Cliff, >> >> At DVCon 2006, I mentioned to you that I think SystemVerilog could >> benefit >> from a Java style interface. The interface I'm thinking of is an >> abstract >> class with the exception that a class can implement multiple interfaces >> (similar to multiple inheritance). >> >> An example interface might be "cloneable" (implements a method which >> returns a deep copy of 'this'). I could create a container class that >> could contain objects of any class that implements "cloneable". A >> "comparable" interface (implements a method to compare 'this' to another >> object) would allow me to build an ordered container for any class >> that is >> both "cloneable" and "comparable". >> >> Mentor Graphics' AVM cookbook has some good examples of how such an >> interface would be used: >> http://www.mentor.com/products/fv/_3b715c/cb_dll.cfm >> >> Paul Butler >> >> Paul.Butler@ni.com >> National Instruments >> Austin, TX > > ---------------------------------------------------- > Cliff Cummings - Sunburst Design, Inc. > 14314 SW Allen Blvd., PMB 501, Beaverton, OR 97005 > Phone: 503-641-8446 / FAX: 503-641-8486 > cliffc@sunburst-design.com / www.sunburst-design.com > Expert Verilog, SystemVerilog, Synthesis and Verification Training > > -- -------------------------------------------------------------------- Gordon Vreugdenhil 503-685-0808 Model Technology (Mentor Graphics) gordonv@model.comReceived on Tue Dec 5 14:27:06 2006
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