{"adoption": {"forks": 3462, "observed_at": "2026-08-28T04:11:27.326516+00:00", "stars": 18986}, "canonical_url": "https://ross.abutalabs.com/products/antlr-v4", "card": {"archived": false, "artifact_type": "library", "description": "ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.", "domain": ["parsers", "programming-languages", "compilers", "developer-tools"], "enriched": true, "function": ["parser", "compiler", "interpreter", "developer-tools"], "health_score": 69, "homepage": "http://antlr.org", "language": "Java", "license": "BSD-3-Clause", "license_family": "permissive", "maturity": "stable", "member_repos": ["antlr/antlr4", "antlr/grammars-v4"], "name": "ANTLR v4", "platform": ["jvm", "python", "cpp", "dotnet", "go", "cross-platform", "php"], "pushed_at": "2026-02-16T21:29:09+00:00", "repo": "antlr/antlr4", "stars": 18986, "tags": ["parser-generator", "grammar", "antlr4", "parse-trees", "ll-parsing", "code-generation", "dsl", "javascript", "swift"], "topics": ["parsing", "parser-generator", "antlr", "antlr4", "java", "grammar", "python", "parse", "language-recognition", "javascript", "csharp", "swift", "cpp", "golang", "php", "dart"], "urls": [{"kind": "homepage", "url": "http://antlr.org"}], "use_cases": ["build a programming language or DSL", "parse structured text files with a custom grammar", "generate a parser in multiple languages from one grammar", "write a SQL or config file parser", "translate or transpile source code", "build an interpreter for a scripting language"], "what_it_is": "ANTLR v4 is a parser generator that reads grammar files and produces parsers, lexers, and parse-tree walkers in ten target languages including Java, Python, C++, and Go. It is widely used to build languages, interpreters, translators, and tools that process structured text or binary formats.", "when_to_avoid": ["you only need simple regex-based text matching", "you want a hand-written recursive descent parser with full control", "your project requires strict semver dependency guarantees"], "when_to_choose": ["you need a battle-tested parser generator with grammars for many real-world languages", "you want generated parsers in several target languages from a single grammar", "you need parse trees with listener/visitor APIs for semantic actions"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/repos/antlr/antlr4", "repo": "antlr/antlr4", "role": "main", "score": 53}, {"path": "/repos/antlr/grammars-v4", "repo": "antlr/grammars-v4", "role": "examples", "score": 76}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:11:27.326516+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:00:42.687650+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "ff2e3bbfc2268ef2965edd917ab5fc0191c9096d88f03a35dafcca31c4aa3425", "fetched_at": "2026-08-28T04:11:27.326516+00:00", "kind": "readme", "missing": false, "url": "https://github.com/antlr/antlr4"}, {"content_hash": "979d95576f4b28f4ed96a734c429b677a46757b0eee019f2f8dde7326b381080", "fetched_at": "2026-08-29T07:59:02.554515+00:00", "kind": "homepage", "missing": false, "url": "http://antlr.org"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 67, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 6055, "days_push": 198, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 53, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}