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We design and study newObj, a calculus and dependent type system for objects and classes which can have types as members. Type members can be aliases, abstract types, or new types. The type system can model the essential concepts of Java's inner classes as ...
A major problem for writing extensible software arises when recursively defined datatypes and operations on these types have to be extended simultaneously without modifying existing code. This paper introduces Extensible Algebraic Datatypes with Defaults w ...
Join calculus, usually presented as a process calculus, is suitable as a foundation of both sequential and concurrent programming. We give a new operational semantics of join calculus, expressed as a reduction system with a single reduction rule similar to ...
We present a type system for a language based on F-sub, which allows certain type annotations to be elided in actual programs. Local type inference determines types by a combination of type propagation and local constraint solving, rather than by global co ...
We present the design of the programming language Keris, an extension of Java with explicit support for software evolution. Keris introduces extensible modules as the basic building blocks for software. Modules are composed hierarchically revealing explici ...
New extensions to programming languages are constantly being proposed. But implementing these extensions usually turns out to be a very difficult and expensive task, since conventional compilers often lack extensibility and reusability. In this paper we pr ...
