{"id":24289277,"url":"https://github.com/rla/prolog-target-js","last_synced_at":"2025-07-23T09:37:40.461Z","repository":{"id":5007974,"uuid":"6166343","full_name":"rla/prolog-target-js","owner":"rla","description":"Simple Prolog to JS transpiler","archived":false,"fork":false,"pushed_at":"2012-10-19T13:27:30.000Z","size":132,"stargazers_count":20,"open_issues_count":2,"forks_count":2,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-04-07T09:38:44.788Z","etag":null,"topics":["javascript","swi-prolog","transpiler"],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/rla.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2012-10-11T00:06:10.000Z","updated_at":"2023-02-06T09:11:41.000Z","dependencies_parsed_at":"2022-09-24T04:51:11.532Z","dependency_job_id":null,"html_url":"https://github.com/rla/prolog-target-js","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/rla/prolog-target-js","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rla%2Fprolog-target-js","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rla%2Fprolog-target-js/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rla%2Fprolog-target-js/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rla%2Fprolog-target-js/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/rla","download_url":"https://codeload.github.com/rla/prolog-target-js/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/rla%2Fprolog-target-js/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":266655768,"owners_count":23963557,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-07-23T02:00:09.312Z","response_time":66,"last_error":null,"robots_txt_status":null,"robots_txt_updated_at":null,"robots_txt_url":"https://github.com/robots.txt","online":true,"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":["javascript","swi-prolog","transpiler"],"created_at":"2025-01-16T10:51:46.586Z","updated_at":"2025-07-23T09:37:40.431Z","avatar_url":"https://github.com/rla.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"prolog-target-js\n================\n\nSimple Prolog to JS transpiler. The project is at rather incomplete state at the moment.\n\nExample input:\n\n```prolog\nappend([], Ys, Ys).\nappend([X|Xs], Ys, [X|Zs]):- append(Xs, Ys, Zs).\n```\n\nExample output:\n\n```javascript\nfunction append_3_0($0, $1, $2, s, cb) {\n    var $3 = new Var();\n    var _i = s.length;\n    s.push(function() {\n        return append_3_1($0, $1, $2, s, cb);\n    });\n    if (!_u(s, $0, '[]')) return _b(s);\n    if (!_u(s, $1, $3)) return _b(s);\n    if (!_u(s, $2, $3)) return _b(s);\n    return cb;\n}\nfunction append_3_1($0, $1, $2, s, cb) {\n    var $3 = new Var();\n    var $4 = new Var();\n    var $5 = new Var();\n    var $6 = new Var();\n    var _i = s.length;\n    if (!_u(s, $0, new Struct('.', $3, $4))) return _b(s);\n    if (!_u(s, $1, $5)) return _b(s);\n    if (!_u(s, $2, new Struct('.', $3, $6))) return _b(s);\n    return append_3_0($4, $5, $6, s, cb);\n}\nexports.append_3 = append_3_0;\n```\n\nCalling the predicate\n---------------------\n\n```javascript\nvar runtime = require('../runtime');\nvar util = require('../util');\nvar append = require('./append');\n\nvar list1 = util.array2List([1, 2, 3, 4, 5]);\nvar list2 = util.array2List([6, 7, 8, 9, 10]);\n\nvar result = new runtime.Var();\n\nruntime.run(append.append_3(list1, list2, result, [], null));\n\nconsole.log('Result is: ' + runtime.toString(result));\n```\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frla%2Fprolog-target-js","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Frla%2Fprolog-target-js","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frla%2Fprolog-target-js/lists"}