Bug 322904

Description Stephan Herrmann 2010-08-17 10:40:17 EDT

This is an RFE to support callout bindings for constructors.

Normally, this is not needed because creating a role together with its base can be achieved by a custom role constructor invoking a base constructor.

However, by supporting callout to a base class constructor a slightly different semantics can be provided: such a callout would first create the base instance and only then create the role using the regular lifting mechanism.

If a base class has a custom equals method, the newly created base may actually be equal to another base for which a role already exists, thus invoking the callout bound constructor can indeed re-use an existing role.

A proposed syntax would be

  protected class MyRole playedBy MyBase {
    MyRole(T arg) -> MyBase(T arg);
  }