{"adoption": {"forks": 280, "observed_at": "2026-08-28T04:05:15.070782+00:00", "stars": 1638}, "canonical_url": "https://ross.abutalabs.com/products/cpp-templates-2ed", "card": {"archived": false, "artifact_type": "learning-resource", "description": "Master Modern C++(11/14/17/20) Templates: TMP, SFINAE, Concepts, CRTP, Variadic Magic, and Compile-Time Sorcery", "domain": ["programming-languages", "education", "tutorials", "developer-tools"], "enriched": true, "function": ["documentation", "developer-tools"], "health_score": 22, "homepage": "https://downdemo.github.io/Cpp-Templates-2ed/", "language": "C++", "license": "Apache-2.0", "license_family": "permissive", "maturity": "stable", "member_repos": ["downdemo/Cpp-Templates-2ed"], "name": "downdemo/Cpp-Templates-2ed", "platform": ["cpp", "cross-platform"], "pushed_at": "2025-01-24T15:09:36+00:00", "repo": "downdemo/Cpp-Templates-2ed", "stars": 1638, "tags": ["cpp-templates", "template-metaprogramming", "generic-programming", "sfinae", "concepts", "crtp", "variadic-templates", "expression-templates", "type-traits", "cpp11", "cpp17", "cpp20", "study-notes", "book-companion", "modern-cpp"], "topics": ["cpp-templates", "template-metaprogramming"], "urls": [], "use_cases": ["learn C++ template metaprogramming from scratch", "understand SFINAE and template argument deduction", "study C++20 concepts with runnable examples", "master variadic templates and perfect forwarding", "find condensed notes for the C++ Templates 2nd edition book", "learn CRTP, type erasure, and expression templates in C++", "prepare for writing generic C++ infrastructure libraries"], "what_it_is": "A study-notes repository that condenses the book 'C++ Templates, 2nd Edition' into organized markdown chapters with runnable, verified C++11/14/17/20 example code. It walks through template techniques from function and class templates to SFINAE, concepts, CRTP, variadic templates, traits, type erasure, and template metaprogramming.", "when_to_avoid": ["You need a reusable template metaprogramming library to link into your project rather than educational notes", "You need the full original textbook's depth rather than condensed summaries", "You are a C++ beginner looking for general language tutorials unrelated to templates"], "when_to_choose": ["You want a free, condensed companion to the C++ Templates 2nd edition book with code you can compile and run", "You prefer structured chapter-by-chapter notes covering C++11 through C++20 template features", "You are an intermediate C++ developer aiming to master templates, TMP, SFINAE, and concepts"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/cpp-templates-2ed", "repo": "downdemo/Cpp-Templates-2ed", "role": "main", "score": 34}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:15.070782+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T03:46:33.434603+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "998a661e70ffe7e20f3fdd0457c64422aba3bfe622cc4956d86b357373bd59a4", "fetched_at": "2026-08-28T04:05:15.070782+00:00", "kind": "readme", "missing": false, "url": "https://github.com/downdemo/Cpp-Templates-2ed"}, {"content_hash": "3e45362320b338fc943a50e7d43dde10e82e8fe57515ab6ad2154722b9361e76", "fetched_at": "2026-08-29T11:19:36.765634+00:00", "kind": "homepage", "missing": false, "url": "https://downdemo.github.io/Cpp-Templates-2ed/"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 3, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": ["no_releases"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 2730, "days_push": 586, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 34, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}