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A New Functional-Logic Compiler For Curry: Sprite, Sergio Antoy, Andy Jost
A New Functional-Logic Compiler For Curry: Sprite, Sergio Antoy, Andy Jost
Computer Science Faculty Publications and Presentations
We introduce a new native code compiler for Curry codenamed Sprite. Sprite is based on the Fair Scheme, a compilation strategy that provides instructions for transforming declarative, non-deterministic programs of a certain class into imperative, deterministic code. We outline salient features of Sprite, discuss its implementation of Curry programs, and present benchmarking results. Sprite is the first-to-date operationally complete implementation of Curry. Preliminary results show that ensuring this property does not incur a significant penalty.
Default Rules In Functional Logic Programs, Sergio Antoy, Michael Hanus
Default Rules In Functional Logic Programs, Sergio Antoy, Michael Hanus
Computer Science Faculty Publications and Presentations
In functional logic programs, rules are applicable independently of textual order, i.e., any rule can potentially be used to evaluate an expression. This is similar to logic languages and opposite to functional languages, e.g., Haskell enforces a strict sequential interpretation of rules. However, in some situations it is convenient to express alternatives by means of compact default rules. Although default rules are often used in functional programs, the non-deterministic nature of functional logic programs does not allow to directly transfer this concept from functional to functional logic languages in a meaningful way. In this paper we propose a new concept …
The Design And Implementation Of A Safe, Lightweight Haskell Compiler, Timothy Jan Chevalier
The Design And Implementation Of A Safe, Lightweight Haskell Compiler, Timothy Jan Chevalier
Computer Science Faculty Publications and Presentations
Typed programming languages offer safety guarantees that help programmers write correct code, but typical language implementations offer no proof that source-level guarantees extend to executable code. Moreover, typical implementations link programs with unsafe runtime system (RTS) code. I present a compiler for the functional language Haskell that preserves some of the properties of Haskell’s type system. The soundness proof for the combination of the compiler and a verified RTS requires a proof that the compiler emits code that cooperates correctly with the RTS. In particular, the latter proof must address the boundary between the user program and the garbage collector. …