{"id":19512321,"url":"https://github.com/vmchale/recursion_schemes","last_synced_at":"2026-02-16T12:32:00.958Z","repository":{"id":128761454,"uuid":"97184010","full_name":"vmchale/recursion_schemes","owner":"vmchale","description":"Recursion schemes for Idris","archived":false,"fork":false,"pushed_at":"2018-08-23T22:06:25.000Z","size":186,"stargazers_count":64,"open_issues_count":2,"forks_count":6,"subscribers_count":4,"default_branch":"master","last_synced_at":"2026-01-11T16:37:02.364Z","etag":null,"topics":["control-flow","idris","idris-ecosystem","recursion","recursion-schemes"],"latest_commit_sha":null,"homepage":null,"language":"Idris","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/vmchale.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2017-07-14T02:24:42.000Z","updated_at":"2025-08-15T11:42:56.000Z","dependencies_parsed_at":"2023-08-25T02:21:42.949Z","dependency_job_id":null,"html_url":"https://github.com/vmchale/recursion_schemes","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/vmchale/recursion_schemes","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Frecursion_schemes","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Frecursion_schemes/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Frecursion_schemes/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Frecursion_schemes/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/vmchale","download_url":"https://codeload.github.com/vmchale/recursion_schemes/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/vmchale%2Frecursion_schemes/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29507902,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-02-16T09:05:14.864Z","status":"ssl_error","status_checked_at":"2026-02-16T08:55:59.364Z","response_time":115,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["control-flow","idris","idris-ecosystem","recursion","recursion-schemes"],"created_at":"2024-11-10T23:25:28.822Z","updated_at":"2026-02-16T12:32:00.941Z","avatar_url":"https://github.com/vmchale.png","language":"Idris","readme":"# recursion_schemes\n\n[![Build Status](https://travis-ci.org/vmchale/recursion_schemes.svg?branch=master)](https://travis-ci.org/vmchale/recursion\\_schemes)\n\nThis is a library providing recursion schemes for Idris. It it is loosely based\non Edward Kmett's [Haskell\nlibrary](https://hackage.haskell.org/package/recursion-schemes).\n\n## Installation\n\nFirst, install [idris-free](https://github.com/idris-hackers/idris-free),\n[comonad](https://github.com/vmchale/comonad) and [composition](https://github.com/vmchale/composition). Then:\n\n```\nidris --install recursion_schemes.ipkg\n```\n\nTo run the tests, install [specdris](https://github.com/pheymann/specdris).\nThen:\n\n```\nidris --testpkg test.ipkg\n```\n\n## Use\n\nThe classic paper [Functional programming with bananas, lenses, envelopes and\nbarbed wire](https://link.springer.com/chapter/10.1007/3540543961_7) is the\ninspiration behind the Haskell library and is the standard reference on the\ntopic. You may also find [Law and Order in\nAlgorithmics](https://pdfs.semanticscholar.org/7ca8/326eb63f32502c0fc2324b6217a7bc7e8af4.pdf)\nto be of use.\n\n### Examples\n\nIn the `Test.Spec` module there are several examples, including a catamorphism,\na zygomorphism, a mutumorphism, an Elgot algebra, a paramorphism, a\ndynamorphism, and a hylomorphism.\n\n### Documentation\n\nYou can find documentation\n[here](https://vmchale.github.io/recursion_schemes/index.html).\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvmchale%2Frecursion_schemes","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fvmchale%2Frecursion_schemes","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fvmchale%2Frecursion_schemes/lists"}