- Method __register_new_program
Called to register the program that is being decoded. Might get called repeatedly with several other programs that are being decoded recursively. The only safe assumption is that when the top level thing being decoded is a program, then the first call will be with the unfinished embryo that will later become that program.
Returns either zero or a placeholder object. A placeholder object must be a clone of __null_program. When the program is finished, the placeholder object will be converted to a clone of it. This is used for pike module objects.