I believe it has to do with features like subtyping and method overloading which cause havok for global type inference. Found a paper here: http://ropas.snu.ac.

I believe it has to do with features like subtyping and method overloading which cause havok for global type inference. Found a paper here: http://ropas.snu.ac.kr/lib/dock/HoMi1995.ps http://ropas.snu.ac.kr/lib/dock/HoMi1995.ps