/* REQUIRED_ARGS: * PERMUTE_ARGS: */ // https://issues.dlang.org/show_bug.cgi?id=17686 interface INode { @property INode parentNode(); @property IDocument ownerDocument(); } interface IDocument: INode {} interface IEntityReference: INode {} class DOMImplementation(T) { abstract class Node: INode { override { @property Node parentNode() { return null; } @property Document ownerDocument() { return null; } } @property bool readonly() { return true; } } abstract class NodeWithChildren: Node {} class Document: NodeWithChildren, IDocument {} class EntityReference: NodeWithChildren, IEntityReference { override { @property bool readonly() { return true; } } } } void main() { alias aaa = DOMImplementation!string; }