{"adoption": {"forks": 313, "observed_at": "2026-08-28T04:08:07.592074+00:00", "stars": 3504}, "canonical_url": "https://ross.abutalabs.com/products/lalrpop", "card": {"archived": false, "artifact_type": "library", "description": "LR(1) parser generator for Rust", "domain": ["parsers", "programming-languages", "developer-tools"], "enriched": true, "function": ["parser", "compiler", "developer-tools"], "health_score": 77, "homepage": "http://lalrpop.github.io/lalrpop/", "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "stable", "member_repos": ["lalrpop/lalrpop"], "name": "lalrpop/lalrpop", "platform": ["rust", "cross-platform"], "pushed_at": "2026-07-25T21:35:02+00:00", "repo": "lalrpop/lalrpop", "stars": 3504, "tags": ["parser-generator", "lr1", "lalr", "grammar", "yacc-alternative", "build-tool-integration"], "topics": ["parser-generator", "rust", "grammar"], "urls": [], "use_cases": ["generate a parser for a custom DSL in Rust", "write a grammar for a programming language compiler", "parse a structured text format like config or query languages", "replace hand-written recursive descent parsing with a grammar-based parser", "build an interpreter or compiler frontend in Rust"], "what_it_is": "LALRPOP is an LR(1) parser generator for Rust focused on usability, letting you write compact, DRY, readable grammars with macros, type inference, and minimal action code. It generates parsers at build time and is used by projects like RustPython and Gluon.", "when_to_avoid": ["you need runtime-extensible or dynamically loaded grammars", "your grammar is highly ambiguous and needs GLR/ALL(*) handling", "you're not using Rust"], "when_to_choose": ["you're writing Rust and want a modern, ergonomic parser generator", "you want LR(1) parsing power with concise grammar syntax and macros", "you need good error messages when grammar construction fails"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/lalrpop", "repo": "lalrpop/lalrpop", "role": "main", "score": 75}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:08:07.592074+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T18:35:47.024333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "cb225e573b724d5941fc777b5a680263419e3868315b4d49e39d8d57165a9d87", "fetched_at": "2026-08-28T04:08:07.592074+00:00", "kind": "readme", "missing": false, "url": "https://github.com/lalrpop/lalrpop"}, {"content_hash": "397b660a6f0c78a0f21285e8f23fbe74f73d443c01d53518030078d519cb81a3", "fetched_at": "2026-08-29T09:29:42.769863+00:00", "kind": "homepage", "missing": false, "url": "http://lalrpop.github.io/lalrpop/"}, {"content_hash": "d8aa950b026473429162a00afcde332c678d919935f641ccf0ac86930e99ac8e", "fetched_at": "2026-08-29T09:29:42.778954+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/lalrpop"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 94, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_releases"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4100, "days_push": 39, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 75, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}