{"id":13780194,"url":"https://github.com/yangtau/hedgehog","last_synced_at":"2026-01-12T02:35:10.335Z","repository":{"id":39840377,"uuid":"170620570","full_name":"yangtau/hedgehog","owner":"yangtau","description":"a toy programming language","archived":false,"fork":false,"pushed_at":"2022-11-15T11:22:47.000Z","size":765,"stargazers_count":32,"open_issues_count":3,"forks_count":7,"subscribers_count":4,"default_branch":"master","last_synced_at":"2024-08-03T18:14:50.506Z","etag":null,"topics":["compiler","interpreter","programming-language","toy-programming-language"],"latest_commit_sha":null,"homepage":"","language":"C","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/yangtau.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}},"created_at":"2019-02-14T03:25:41.000Z","updated_at":"2024-04-26T01:06:04.000Z","dependencies_parsed_at":"2022-08-23T02:51:07.342Z","dependency_job_id":null,"html_url":"https://github.com/yangtau/hedgehog","commit_stats":null,"previous_names":[],"tags_count":2,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/yangtau%2Fhedgehog","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/yangtau%2Fhedgehog/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/yangtau%2Fhedgehog/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/yangtau%2Fhedgehog/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/yangtau","download_url":"https://codeload.github.com/yangtau/hedgehog/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":225056773,"owners_count":17414206,"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","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":["compiler","interpreter","programming-language","toy-programming-language"],"created_at":"2024-08-03T18:01:13.227Z","updated_at":"2026-01-12T02:35:10.330Z","avatar_url":"https://github.com/yangtau.png","language":"C","funding_links":[],"categories":["C"],"sub_categories":[],"readme":"# Hedgehog\n\nIt is hard to design a good programming language.\n\n```\nfn fac(n) {\n  if n \u003c=1 { return 1 } else { return n * fac(n-1) }\n}\n\n# tail call version:\nfn fac_tailcall(n) {\n  fn f(acc, n) {\n    if n \u003c= 1 { return acc} else { return fn(acc*n, n-1) }\n  }\n  return f(1, n)\n}\n```\n## Modules\n\nA module is an anonymous function.\n\n```\n# math\nm = {}\nm.pi = 3.14159\n\nm.add = fn (x, y) { return x+y }\n\nreturn m\n```\n\n```\nmath = require(\"math\") # import math module\nprint = require(\"std\").print\n\nmath.add(3, 9) # 12\nprint(math.pi) --\u003e 3.14159\n```\n\n```\n# a modules looks like this for interpreter:\nfu () {\n    m = {}\n    m.pi = 3.14159\n\n    m.add = fn (x, y) { return x+y }\n\n    return m\n}()\n```\n\n## functional\n\n```\nfn filter(t, predicate) {\n    res = {}\n    for k, v in t {\n        if predicate(v) {\n            res[k] = v\n        }\n    }\n    return res\n}\n\nfn map(t, f) {\n    res = {}\n    for k, v in t {\n        res[k] = f(v)\n    }\n    return res\n}\n\n# `x.f(y)` is a syntax sugar for `f(x, y)`\n{1, 2, 3, 4}.\n    filter(fn (x) {return x\u003e1}).\n    map(fn (x) {return x+1}) # --\u003e 3, 4, 5\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fyangtau%2Fhedgehog","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fyangtau%2Fhedgehog","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fyangtau%2Fhedgehog/lists"}