Abstract

We show that any monad whose unit and extension operations are expressible as purely functional terms can be embedded in a call-by-value language with "composable continuations". As part of the development, we extend Meyer and Wand's characterization of the relationship between continuation-passing and direct style to one for continuation-passing vs. general "monadic" style. We further show that the composablecontinuations construct can itself be represented using ordinary, non-composable first-class continuations and a single piece of state. Thus, in the presence of two specific computational effects -- storage and escapes -- any expressible monadic structure (e.g., nondeterminism as represented by the list monad) can be added as a purely definitional extension, without requiring a reinterpretation of the whole language. The paper includes an implementation of the construction (in Standard ML with some New Jersey extensions) and several examples. 1 Introduction 1.1 Background and o...

Citations

192	Standard ML of New Jersey - McQueen, Appel - 1991