Re: [Swig-user] GSOC:Better Multiple Inheritance Support

[William S F. <ws...@fu...>]

zy.jiang wrote:
>  add a directive
> likes"%multiinherit(subclass,baseclass1=1,baseclass2...) " ,it shows the
> class's base class name,"baseclass1=1" shows that we can extends the
> baseclass1 in java,and baseclass2 will be implemented by interface , and
> add implementation code in wrap or proxy class!
> 
I just found this in my outbox which should have been sent a week or two 
ago...

The syntax you propose doesn't really fit in with the way %feature
works. I propose that C++ base classes that can be treated as interfaces
should be flagged with a new 'interface' feature. For example:

%feature("interface") Interface1;
%feature("interface") Interface2;

struct Interface1 { public: void foo() = 0; };
struct Interface2 {};
struct ConcreteBase { public: void bar(); };

struct Derived : Interface1, Interface2, ConcreteBase {};

should then generate the proxy class code for Interface1 and Interface2
as Java interfaces. SWIG should also ensure that Derived uses Interface1
and Interface2 as an interface instead of a base class.

William