Add basic mixin combinators
Add basic mixin combinators

bixuanzju/fcore,zhiyuanshi/fcore,hkuplg/fcore,xnning/fcore,zhiyuanshi/fcore,wxzh/fcore,xnning/fcore,hkuplg/fcore,hkuplg/fcore,xnning/fcore,bixuanzju/fcore,bixuanzju/fcore,zhiyuanshi/fcore,wxzh/fcore,wxzh/fcore