CPL: An interpreter of Hagino's Categorical Programming Language (CPL).

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An interpreter of Hagino's Categorical Programming Language (CPL).

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Versions [RSS] [faq] 0.0.5, 0.0.6, 0.0.7, 0.0.8, 0.0.9
Change log CHANGELOG.markdown
Dependencies array, base (==4.*), containers, haskeline, mtl (>=, parsec, readline [details]
License BSD-3-Clause
Author Masahiro Sakai (masahiro.sakai@gmail.com)
Maintainer masahiro.sakai@gmail.com
Category Compilers/Interpreters
Source repo head: git clone git://github.com/msakai/cpl.git
Uploaded by MasahiroSakai at 2016-01-14T14:55:18Z
Distributions NixOS:0.0.9
Executables cpl
Downloads 4348 total (17 in the last 30 days)
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Status Hackage Matrix CI
Docs not available [build log]
Last success reported on 2016-10-24 [all 11 reports]

Manual Flags


build statically linked binaries

Automatic Flags

Use Readline


Use Haskeline


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


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For package maintainers and hackage trustees


Readme for CPL-0.0.8

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An implementation of "A Categorical Programing Language"

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This package is an implementation of "A Categorical Programing Language" (CPL for short)[1][2] written in Haskell.

CPL is a functional programming language based on category theory. Data types are declared in a categorical manner by adjunctions. Data types that can be handled include the terminal object, the initial object, the binary product functor, the binary coproduct functor, the exponential functor, the natural number object, the functor for finite lists, and the functor for infinite lists. Each data type is declared with its basic operations or morphisms. Programs consist of these morphisms, and execution of programs is the reduction of elements (i.e. special morphisms) to their canonical form.


De-Compress archive and enter its top directory. Then type:

$ cabal configure
$ cabal build
$ cabal install

If you want to compile with readline or haskeline, add -fReadline or -fHaskeline respectively to configure command.


See chapter 5 of [1]


This program is licenced under the BSD-style license. (See the file 'COPYING'.)

Copyright (C) 2004-2014 Masahiro Sakai masahiro.sakai@gmail.com


Masahiro Sakai masahiro.sakai@gmail.com


(1) Tatsuya Hagino, “A Categorical Programming Languge”. Ph.D. Thesis, University of Edinburgh, 1987 available at http://www.tom.sfc.keio.ac.jp/~hagino/index.html.en

(2) Tatsuya Hagino, “Categorical Functional Programming Language”. Computer Software, Vol 7, No.1. Advances in Software Science and Technology 4, 1992 ISBN 0-12-037104-9