exenum

AuthorDidier Le Botlan <github.lebotlan@dfgh.net>
LicenseMIT License
Homepagehttps://github.com/lebotlan/ocaml-exenum
Issue Trackerhttps://github.com/lebotlan/ocaml-exenum/issues
MaintainerDidier Le Botlan <github.lebotlan@dfgh.net>
Dependencies
&dune
zarith
Optional dependencies
lwt
Availableocaml-version >= "4.02.3"
PublishedAug 14, 2018
Source [http] https://github.com/lebotlan/ocaml-exenum/archive/0.86.tar.gz
a4854a0286dfd8bcb3f34003365195a9
StatisticsInstalled 10 times last month.
Edithttps://github.com/ocaml/opam-repository/tree/master/packages/exenum/exenum.0.86/opam

Build efficient enumerations for datatypes. Inspired by Feat for Haskell.

The exenum library offers constructors to build enumerations for datatypes, that is, functions from (arbitrarily large) integers to values. Such enumerations are typically used for unit testing. The library is efficient: the n-th element of an enumeration is returned without having computed the (n-1) previous elements. Complexity is in log(n), except for some pathological datatypes. See the homepage for details: https://github.com/lebotlan/ocaml-exenum Inspired by Feat: Functional Enumeration of Algebraic Types, by Duregard, Jansson, Wang, Chalmers University.

As an example, consider the following datatype: type term = Var of string | App of term * term | Lambda of string * term

Using exenum, one may easily generate zillions of different lambda-terms. In our specific example, term number 2000000000000 happens to be ((((x v) (fun u -> y)) ((fun u -> y) (fun y -> y))) (((x v) (fun u -> v)) (fun u -> y)))

No package is dependent