exenumversion

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.

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)))

Efficiency: computing lambda-term number 1E200 is instantaneous (on an antique Intel Centrino).

AuthorD. Le Botlan
LicenseGPL-3.0-only
Published
Homepagehttp://exenum.forge.ocamlcore.org/
Maintainerlebotlan@users.forge.ocamlcore.org
Dependencies
Source [http] https://download.ocamlcore.org/exenum/exenum-source/0.6/exenum-source-0.6.tgz
sha256=ffb6e475153c79dd4e10116c6d537520a5aaa4a838c618aec2d213aaab02112f
md5=ee90d1dd3c7664a2ee657597bafc064b
Edithttps://github.com/ocaml/opam-repository/tree/master/packages/exenum/exenum.0.6/opam
Required by