Most modular programming languages provide an encapsulation concept. Such concepts are used to protect the representational details of the implementation of an abstraction from abuse by its clients. Unfortunately, strict encapsulation is hindered by the separate compilation facilities provided by modern languages. The goal of the work presented here is to introduce techniques which allow modular languages to support both separate compilation and strict encapsulation without undue translation-time or execution-time cost.

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To try out the system you need (at least) a Modula-2 compiler and a Sun3.

paster.tar.gz The full package, including source (in Modula-2) for the Zuse compiler and linker.
This software is copyright 1992, the University of Lund. You are given the right to freely copy and modify this work, as long as you attribute its origin.
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Publications
Christian S. Collberg	Flexible Encapsulation		December, 1992
Christian S. Collberg	PhD Thesis, Lund University	Department of Computer Science, Lund, Sweden	288 pages
Christian S. Collberg, Magnus G. Krampell	Pasters: Linkers in a Modular World		1986
Christian S. Collberg, Magnus G. Krampell	Technical Report LUNDFD6/NFCS-7002	Lund University
Christian S. Collberg	Distributed High-Level Module Binding for Flexible Encapsulation and Fast Inter-Modular Optimization		March, 1994
Christian S. Collberg	International Conference on Programming Languages and Systems Architectures, Springer Verlag, LNCS 782	Zurich, Switzerland	pp. 282-297
Christian S. Collberg, Magnus G. Krampell	Design and Implementation of Modular Languages Supporting Information Hiding		February, 1987
Christian S. Collberg, Magnus G. Krampell	Proceedings of the Sixth International Phoenix Conference on Computers and Communications	Scottsdale, Arizona	pp. 224-228