== JavaScript MOP Utilities

Defines some utilities for JavaScript metaprogramming:

  MOP.delegate(target, propertyName, methods)
    For each name in `methods`, defines a method on `target` with this
    name, that delegates to the method of the `propertyName` property
    of `target` with the same name.

And these for asynchronous metaprogramming:

  new MOP.MethodReplacer(object, methods)
    When a new MethodReplacer is constructed, it replaces each method
    on `object` by the method in `methods` with the same key value, if
    such a method exists.  A MethodReplacer has a single method,
    `restore`, which restores each method to its pre-replacement
    value.

  new MOP.QueueBall(object, methodNames)
    When a new QueueBall is constructed, it replaces each method named
    by `methodNames` with a method that enqueues the method call (the
    name of the method and its arguments).  A QueueBall has a single
    method, `replayMethodCalls`, which plays back the method calls and
    restores the methods.

  MOP.withMethodOverridesCallback(object, methods, fn)
    Calls `fn` on `object`, within a dynamic scope within which the
    methods in `methods` have temporarily replaced the like-named
    methods on `object`.  The scope is terminated by the argument to
    the call to `fn`; this argument should be treated as a
    continuation, and restores the methods.

  MOP.withDeferredMethods(object, methodNames, fn)
    Calls `fn` on `object`, within a dynamic scope within which the
    methods in `methodNames` have been enqueued.  The scope is
    terminated by the argument to the call to `fn`; this argument
    should be treated as a continuation, and ends the queue, replaying
    the methods.


See the specs for examples.


== License

Copyright 2007-2008 by Oliver Steele.  Available under the MIT License.