本作品采用知识共享署名-相同方式共享 4.0 国际许可协议进行许可。本文稍后将同步发布于知乎本文基于 [1]Wadler, P.: The Expression Problem. Email (Nov 1998), discussion on the JavaGenericity mailing list[2]Zenger, M., Odersky, M.: Independently extensible solutions to the expression prob-lem. In: FOOL’05 (2005)[3]Oliveira, B.C.d.S., Cook, W.R. (201...