topic Doubt in Inheritance ! in Application Development and Automation Discussions https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524615#M847847 <HTML><HEAD></HEAD><BODY><P>Hi Experts,</P><P> </P><P>i have doubt in inheritances .</P><P></P><P>why multiple inheritance is not possible in OOAbap ?</P><P>wat is the Reason ?</P><P>can any one Clarify my doubt ?</P><P></P><P>Cheers,</P><P>Rajesh .!</P></BODY></HTML> Wed, 27 Feb 2008 12:28:08 GMT Former Member 2008-02-27T12:28:08Z Doubt in Inheritance ! https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524615#M847847 <HTML><HEAD></HEAD><BODY><P>Hi Experts,</P><P> </P><P>i have doubt in inheritances .</P><P></P><P>why multiple inheritance is not possible in OOAbap ?</P><P>wat is the Reason ?</P><P>can any one Clarify my doubt ?</P><P></P><P>Cheers,</P><P>Rajesh .!</P></BODY></HTML> Wed, 27 Feb 2008 12:28:08 GMT https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524615#M847847 Former Member 2008-02-27T12:28:08Z Re: Doubt in Inheritance ! https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524616#M847848 <HTML><HEAD></HEAD><BODY><P>Multiple inheritance is not permitted in ABAP Objects, because the language designers considered that it would cause ambiguity and complexity they didn't want.</P><P></P><P>Use interfaces instead. See my recent post about interfaces for ideas.</P><P></P><P>matt</P></BODY></HTML> Wed, 27 Feb 2008 12:57:51 GMT https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524616#M847848 matt 2008-02-27T12:57:51Z Re: Doubt in Inheritance ! https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524617#M847849 <HTML><HEAD></HEAD><BODY><P>Problems:</P><P>mostly used as &#146;mixin&#146; = interface</P><P>polymorphism on all axes (substitutability is hard)</P><P>name conflicts (in distributed development!)</P><P>multiple base classes? (diamond inheritance)</P><P>combinatorial explosion for multiple classification</P><UL><LI level="1" type="ul"><P>must be resolved by role pattern or the like</P></LI><LI level="1" type="ul"><P>would be static, not dynamic</P></LI></UL><P>=&gt; multiple inheritance doesn&#146;t do it!</P></BODY></HTML> Wed, 27 Feb 2008 15:26:50 GMT https://community.sap.com/t5/application-development-and-automation-discussions/doubt-in-inheritance/m-p/3524617#M847849 former_member576008 2008-02-27T15:26:50Z