exenum

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

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: http://exenum.forge.ocamlcore.org/ 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).

Install
Published
14 Dec 2015
Sources
exenum-source-0.7.tgz
md5=31ec3baafaff2fbd49eb420728fbf6db
Dependencies
Reverse Dependencies
cryptodbm
< "0.84.2"