λ_AOP: An AOP Extended Lambda-Calculus

Abstract

This paper presents an implicitly-typed functional, aspect-oriented programming language: lambda_AOP. The main contribution of the paper is a semantics for lambda_AOP advice weaving. The weaving is type-based and implemented statically. We extend the Hindley-Milner type inference system to inject applicable advices into lambda expressions during typing. The proposed semantics for advice weaving is close to the spirit of Aspect J, the most popular AOP language, where advices are injected before, after, or around points that match their respective pointcuts. For this purpose, the sequence construct of the extended lambda-calculus is used.