Twig: A Configurable Domain-Specific Language

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Title: Twig: A Configurable Domain-Specific Language
Author: Hulette, Geoffrey
Abstract: Programmers design, write, and understand programs with a high-level structure in mind. Existing programming languages are not very good at capturing this structure because they must include low-level implementation details. To address this problem we introduce Twig, a programming language that allows for domain-specific logic to be encoded alongside low-level functionality. Twig's language is based on a simple, formal calculus that is amenable to both human and machine reasoning. Users may introduce rules that rewrite expressions, allowing for user-defined optimizations. Twig can also incorporate procedures written in a variety of low-level languages. Our implementation supports C and Python, but our abstract model can accommodate other languages as well. We present Twig's design and formal semantics and discuss our implementation. We demonstrate Twig's use in two different domains, multi-language programming and GPU programming, and compare Twig against a well-known typemapping system, SWIG.
Date: 2012

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