Abstract
The notion of a monad cannot be expressed within higher-order logic
(HOL) due to type system restrictions. We show that if a monad is used
with values of only one type, this notion can be formalised in HOL.
Based on this idea, we develop a library of effect specifications and
implementations of monads and monad transformers. Hence, we can
abstract over the concrete monad in HOL definitions and thus use the
same definition for different (combinations of) effects. We illustrate
the usefulness of effect polymorphism with a monadic interpreter for a
simple language.
License
History
- February 15, 2018
- added further specifications and implementations of non-determinism;
more examples
(revision bc5399eea78e)