p6 and p6i

• p6 --- An experimental parallel object-oriente language with state abstraction-based synchronization (no inheritance).
• p6i --- An inheritance-enabled successor of p6.
  • A class-based OOPL.
  • Two types of modules --- interface module and class (== implementaiton) module.
  • Interface inheritance and implementation inheritance are totally independent.
  • Interface:: multiple inheritance; implementation:: single inheritance + delegation.