Add mixins to the inherit call?

[samreid]

Would it simplify our inheritance system or make it easier to read/understand if mixins were specified in the inheritance call?

inherit(Object,[mixins],Type,{},{})

I considered this will working on phetsims/tandem#31

[jonathanolson]

The order of parameters there would definitely complicate how inherit would detect things (or would be impossible).

And usually mixing in is a function call (with parameters potentially). Are you thinking we'd need to have, e.g.:

inherit( Object, [ new Poolable( { maxPoolSize: 100 } ) ], Type, {}, {} );

This seems like it would add complications.

[samreid]

It looks like it would be even more complicated if we have to supply arguments like

  Poolable.mixInto( Bounds2, {
    defaultFactory: function() { return Bounds2.NOTHING.copy(); },
    constructorDuplicateFactory: function( pool ) {
      return function( minX, minY, maxX, maxY ) {
        if ( pool.length ) {
          return pool.pop().setMinMax( minX, minY, maxX, maxY );
        }
        else {
          return new Bounds2( minX, minY, maxX, maxY );
        }
      };
    }
  } );

Or would those be "abstract" methods that get implemented in the prototype (in the first {} in the inherit call)?

[samreid]

I came across this mixin/inheritance library: https://github.com/rse/aggregation which uses this syntax (es6)

class Rectangle extends aggregation(Shape, Colored, ZCoord) {}

[samreid]

I also noticed ES6 provides mixin support: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes