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Warnings for pattern matching

Published online by Cambridge University Press:  15 February 2007

LUC MARANGET
LUC MARANGET*
Affiliation:
Inria Rocquencourt, BP 105, 78153 Le Chesnay Cedex, France (e-mail: Luc.Maranget@inria.fr)
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Abstract

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We examine the ML pattern-matching anomalies of useless clauses and non-exhaustive matches. We state the definition of these anomalies, building upon pattern matching semantics, and propose a simple algorithm to detect them. We have integrated the algorithm in the Objective Caml compiler, but we show that the same algorithm is also usable in a non-strict language such as Haskell. Or-patterns are considered for both strict and non-strict languages.

Type
Article
Information
Journal of Functional Programming , Volume 17 , Issue 3 , May 2007 , pp. 387 - 421
Copyright
Copyright © Cambridge University Press 2007

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