{"id":21678795,"url":"https://github.com/lucasbotang/made_up_programming_language","last_synced_at":"2026-03-19T21:05:17.988Z","repository":{"id":162696088,"uuid":"237891193","full_name":"LucasBoTang/Made_Up_Programming_Language","owner":"LucasBoTang","description":"MUPL language interpreter implemented by Racket","archived":false,"fork":false,"pushed_at":"2020-02-03T05:32:50.000Z","size":5,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-10-31T05:49:02.718Z","etag":null,"topics":["functional-programming","interpreter","mupl","racket"],"latest_commit_sha":null,"homepage":null,"language":"Racket","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/LucasBoTang.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,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-02-03T05:23:02.000Z","updated_at":"2023-05-10T09:04:02.000Z","dependencies_parsed_at":null,"dependency_job_id":"7d86f979-9d07-4a0c-8a10-5ff7df3ede89","html_url":"https://github.com/LucasBoTang/Made_Up_Programming_Language","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/LucasBoTang/Made_Up_Programming_Language","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/LucasBoTang%2FMade_Up_Programming_Language","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/LucasBoTang%2FMade_Up_Programming_Language/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/LucasBoTang%2FMade_Up_Programming_Language/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/LucasBoTang%2FMade_Up_Programming_Language/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/LucasBoTang","download_url":"https://codeload.github.com/LucasBoTang/Made_Up_Programming_Language/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/LucasBoTang%2FMade_Up_Programming_Language/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":29769176,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-02-24T01:40:24.820Z","status":"online","status_checked_at":"2026-02-24T02:00:07.497Z","response_time":75,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","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":["functional-programming","interpreter","mupl","racket"],"created_at":"2024-11-25T14:41:30.418Z","updated_at":"2026-02-24T02:31:34.881Z","avatar_url":"https://github.com/LucasBoTang.png","language":"Racket","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Made_Up_Programming_Language\n\nA simple language interpreter implemented by Racket.\n\n## Syntax Defination\n\n- If s is a Racket string, then (var s) is a mupl expression (a variable use).\n\n- If n is a Racket integer, then (int n) is a mupl expression (a constant).\n\n- If e1 and e2 are mupl expressions, then (add e1 e2) is a mupl expression (an addition).\n\n- If s1 and s2 are Racket strings and e is a mupl expression, then (fun s1 s2 e) is a mupl expression (a function). In e, s1 is bound to the function itself (for recursion) and s2 is bound to the (one) argument. Also, (fun #f s2 e) is allowed for anonymous nonrecursive functions.\n\n- If e1, e2, and e3, and e4 are mupl expressions, then (ifgreater e1 e2 e3 e4) is a mupl expression. It is a conditional where the result is e3 if e1 is strictly greater than e2 else the result is e4. Only one of e3 and e4 is evaluated.\n\n- If e1 and e2 are mupl expressions, then (call e1 e2) is a mupl expression (a function call).\n\n- If s is a Racket string and e1 and e2 are mupl expressions, then (mlet s e1 e2) is a mupl expression (a let expression where the value resulting e1 is bound to s in the evaluation of e2).\n\n- If e1 and e2 are mupl expressions, then (apair e1 e2) is a mupl expression (a pair-creator).\n\n- If e1 is a mupl expression, then (fst e1) is a mupl expression (getting the first part of a pair).\n\n- If e1 is a mupl expression, then (snd e1) is a mupl expression (getting the second part of a pair).\n\n- (aunit) is a mupl expression (holding no data, much like () in ML or null in Racket). Notice (aunit) is a mupl expression, but aunit is not.\n\n- If e1 is a mupl expression, then (isaunit e1) is a mupl expression (testing for (aunit)).\n\n- (closure env f) is a mupl value where f is mupl function (an expression made from fun) and env is an environment mapping variables to values. Closures do not appear in source programs; they result from evaluating functions.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flucasbotang%2Fmade_up_programming_language","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flucasbotang%2Fmade_up_programming_language","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flucasbotang%2Fmade_up_programming_language/lists"}