== Quote from Derek Parnell (de...@psych.ward)'s article > This is what I thought too. In D, a value type can be derived from another > value type by using a combination of data aggregation (data inheritance if > you will) and interface aggregation (method inheritance?). > I feel that D could do with a little more syntax support for derived value > types though, because at times it is a bit awkward and/or verbose. I'll dig > up some examples of what I mean.
In D2, you could try aggregation and opDot() w/ ref return. See http://digitalmars.com/d/2.0/operatoroverloading.html#Dot . That pretty much simulates a form of inheritance w/o polymorphism. struct Foo { int i; void doStuff() { // Do stuff. } } struct Bar { private Foo foo; ref Foo opDot() { return foo; } } void main() { Bar bar; bar.doStuff(); // Calls Bar.foo.doStuff(). } One caveat, though, is that operator overloading behaves weirdly w/ this. See bug 2327: http://d.puremagic.com/issues/show_bug.cgi?id=2327
