Method lfun::cast()

Method cast: mixed cast(string requested_type)
Description: Value cast callback.
Parameter requested_type: Type to cast to.
Returns: Expected to return the object value-casted (converted) to the type described by requested_type .
Note: The argument is currently a string with the name of the type, but might in the future be a value of the type type.
Note: Currently casting between object types is a noop.
Note: If the returned value is not deemed to be of the requested type a runtime error may be thrown.
Note: It's assumed that this function is side-effect free.