LambdaConf 2015 - LiquidHaskell Refinement Types for Haskell Ranjit Jhala
Автор: Confreaks
Загружено: 2015-12-30
Просмотров: 3195
Описание: Haskell has many delightful features, perhaps the most beloved of which is its type system which allows developers to specify and verify a variety of program properties at compile time. However, many properties, typically those that depend on relationships between program values are impossible, or at the very least, cumbersome to encode within Haskell's type system. Refinement types enable the specification and verification of value-dependent properties by extending Haskell's type system with logical predicates drawn from efficiently decidable logics. In this talk, we will start with a high level description of Refinement Types. Next, we will present an overview of LiquidHaskell, a refinement type checker for Haskell. In particular, we will describe the kinds of properties that can be checked, ranging from generic requirements like like totality (will 'head' crash?) and termination (will 'mergeSort' loop forever?), to application specific concerns like memory safety (will my code 'SEGFAULT' ?) and data structure correctness invariants for various libraries like containers, hscolour, bytestring, text, vector-algorithms and xmonad.
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