Are there container templates that one can mixin to classes that give them container behavior?
e.g., instead of class A { Array!int x; } I want class A { mixin Array!int; } so that I can do something like a.Add(3) instead of a.x.Add(3). In fact, I do want the first case because I will have multiple arrays and need a way to add separation between them(the x does that here) BUT the real problem is I need to hook into the add, remove, etc to do things like validate. e.g., programming challenge: Create a class that contains two different arrays of type int and type float that will restrict the int's to a range of 3 to 10 and print a msg to the consol when a float larger than 1 is added or removed from the float array. a.myints.add(1); // asserts a.myfloats.add(5); // prints msg to console myints nor myfloats need to be actual elements of the class. In fact, in this case it might be ok to override them, e.g., a.add(1) and a.add(5f) above. The goal here is to do this in the minimum amount of work. I don't want to have to recreate the array code every time I use them in the class... and I don't want to inherit from a class or use DI. e.g., templates should be the way to go. Just not sure how to make it all work and if there are templates that work this way(allow hooking into the methods). I thought about using inner classes to add the separation: class a { class myints // : Array!int { mixin Array!int; // override void Add(int i) {} } } which I guess would work better if myints was a template. Any ideas?