, this made rust skip the\nkeyword-boundary check for literals like '${', so a template `${x}`\ninterpolated in rust b\n[…]\nt. mini-js now\nparses identically across both implementations (all 30 cases), completing\nbyte-identical parsing on the culebra corpus too.\n\nGuarded by spec/tests/extensions/word_boundary_literal.json.", "is_bot": false, "headline": "rust-peglib: treat a literal as a word by %word start-match, like cpp", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T02:33:26Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "601d9048204aa83c4b41159b3f79d60cc81b1549", "body": "Two cases where rust marked a rule as a non-token that cpp treats as a\ntoken, changing the raw AST (a token leaf vs a node with children):\n- a reference to a macro is not itself a rule for token purposes; recurse\n into the macro's arguments instead;\n- references that appear only inside an and/not predicate do not count.\n\nAcross 146 real culebra source files the two implementations now produce\nbyte-identical raw and optimized ASTs. Guarded by\nspec/tests/core/token_determination.json.", "is_bot": false, "headline": "rust-peglib: match cpp is_token determination for macros and predicates", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T02:27:39Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "52c3733c6b3b18347a6baac94f480d06a392230e", "body": "For a left-recursive rule, cpp-peglib fires enter/leave once per do_parse\ncall (the seed and each grow), while a recursive reference that hits the\nLR memo fires nothing. rust fired enter/leave once at the Holder level\nand let recursive references trace via the memo path, producing a\ndifferent event \n[…]\nrules still trace once in Holder,\n before the packrat check, so cache hits trace like cpp's uncached\n re-parse.\n\nGuarded by the trace_left_recursion group in\nspec/tests/semantic/trace_ordering.json.", "is_bot": false, "headline": "rust-peglib: fire enter/leave per LR seed/grow iteration", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T02:07:16Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "6c5d05a9c87777b95edabbe917c7feda1f2fbc1c", "body": "cpp-peglib parses a macro instantiation directly, without pushing a\nsemantic scope or firing the rule's enter/leave hooks — the macro rule\nis transparent and only the expanded body's rules appear in a trace.\nrust fired enter/leave for the macro rule too. Add the early macro path\nin Holder::parse_core to match.\n\nGuarded by spec/tests/semantic/trace_ordering.json.", "is_bot": false, "headline": "rust-peglib: macro rules are transparent to enter/leave", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T01:44:05Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "62ca52be59a70af531fc86c2faf76e057573a7e5", "body": "The `|` dictionary operator binds tighter than sequence and `/`, like\ncpp-peglib (`Dictionary \u003c- Literal ('|' Literal)+` is a primary). It was\nhandled at the expression level instead, which both rejected mixing `|`\nand `/` (`'a' | 'b' / 'c'`) and rejected `'a' 'b' | 'c'`.\n\nMove dictionary collection\n[…]\n| 'b' / 'c'`\nparses as `('a' | 'b') / 'c'` and `'a' 'b' | 'c'` as `'a' ('b' | 'c')`,\nand drop the now-unnecessary mix/literal-only checks.\n\nGuarded by spec/tests/extensions/dictionary_precedence.json.", "is_bot": false, "headline": "rust-peglib: parse `|` (dictionary) at the primary level", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T01:34:40Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "5f855d0353e8d14a499645e6711ee34936387d30", "body": "Five cases where rust-peglib was more permissive than the reference:\n- unknown escape sequences (e.g. `\\z`) are an error instead of silently\n becoming the literal character;\n- reversed character-class ranges (`[z-a]`);\n- unrecognized instructions inside `{ ... }`;\n- more than one leading `~` ignore operator;\n- duplicate `%whitespace` / `%word` definitions.\n\nGuarded by spec/tests/core/grammar_rejections.json.", "is_bot": false, "headline": "rust-peglib: reject invalid grammars that cpp-peglib rejects", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T01:27:36Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "8b923b16f565c44cf5d81cbce38c5af652407523", "body": "… parser\n\nAdd a README section for GrammarBlob serialization (serialize_grammar / load_blob,\npeglint --blob) covering fast startup, the structure-only limitation, and the\nunsupported operators.\n\nSync grammar/cpp-peglib.peg with peglib.h's internal meta-grammar: rename the\nerror message keyword to `e\n[…]\nr escape\nset, add the `ast_name` instruction, and drop the redundant BeginCapScope\nalternative in Primary in favor of CapScope.\n\nClaude-Session: https://claude.ai/code/session_017WVG7euqwWKfr2tY3gzu8y", "is_bot": false, "headline": "docs: document grammar serialization and sync cpp-peglib.peg with the…", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T01:26:10Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "09576bbb49f012bd8344e93517fe68e6218e88b8", "body": "Three divergences in the reported parse error:\n- Trailing input after a full match now reports \"expected end of input\"\n instead of a generic \"syntax error.\" (unless a deeper error was\n recorded past the match end).\n- When a nested attempt fails past the accepted match, its position is\n used for t\n[…]\nion and the\n current rule via set_error_pos, so the message names the unexpected\n token and expected rule instead of a bare \"syntax error.\".\n\nGuarded by spec/tests/error/trailing_and_predicate.json.", "is_bot": false, "headline": "rust-peglib: match cpp error reporting for trailing input and lookahead", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:57:49Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "88de66db9a689f4761d5007ecb5369b2ad3e54a3", "body": "A rule node should carry a /N choice suffix only when its body is\nchoice-like (PrioritizedChoice or Dictionary, unwrapping a token\nboundary); a choice nested inside a sequence must not leak it. do_parse\nnow resets choice_count/choice after the body parses unless the body is\nchoice-like, mirroring cpp-peglib's Holder.\n\nGuarded by spec/tests/ast/choice_count.json.", "is_bot": false, "headline": "rust-peglib: don't leak nested-choice choice_count onto rule AST nodes", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:40:12Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "2cdce1c698af37e4d8b85a31c92f905510f794ec", "body": "Both implementations mishandled escapes that the meta grammar accepts:\n- cpp resolved `\\-` and `\\^` to NUL (resolve_escape_sequence fell through\n to octal parsing, which read no digits).\n- rust resolved `\\f` and `\\v` to the literal letters 'f'/'v' (they hit\n the catch-all arm of parse_escape_char).\n\nAdd the missing cases so `\\-`/`\\^` are literal '-'/'^' and `\\f`/`\\v` are\nU+000C/U+000B in both. Guarded by spec/tests/core/escapes.json.", "is_bot": false, "headline": "Fix escaped `\\-` `\\^` `\\f` `\\v` in character classes and literals", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:33:10Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "6834ee60cda132586b2aca9050ab80f144b30dde", "body": "A grammar whose first rule is a reserved `%` directive (%word,\n%whitespace) wrongly used that directive as the start rule. Skip\n`%`-prefixed names when picking the default start. Long-standing since\n%word was added in 2018.\n\nAdd spec/tests/core/start_rule.json as a regression guard.", "is_bot": false, "headline": "Exclude %-directives from default start-rule selection", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:18:47Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "67f344a6dd973c831f66c39bef6d9a7f356bcc6d", "body": "Add language-independent conformance tests covering AST optimization\nand instructions (spec/tests/ast/) plus Unicode character classes, dot\nmatching, and non-ASCII rule names/literals (spec/tests/unicode/).\nExpected values were generated with cpp-peglib.", "is_bot": false, "headline": "spec: migrate AST and Unicode conformance tests from the C++ suite", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:18:37Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "50847b3f881a5e4e4b3c6acb5ee3ed9c1f1f8a61", "body": "- UTF-8 identifiers: accept non-ASCII (BMP) rule names in the meta\n parser, excluding the cut markers, mirroring cpp's IdentStart.\n- AST instructions: parse `{ no_ast_opt }` and `{ ast_name: X }` and\n apply them (previously the instruction block was discarded).\n- `~` ignore operator in AST mode: w\n[…]\nvalue/tokens, keeping its siblings.\n- harness: use the parser's optimize_ast so no_ast_opt is honored.\n\nStrengthen spec/tests/core/ignore.json with expected_ast assertions\nthat guard the `~` behavior.", "is_bot": false, "headline": "rust-peglib: fix parity gaps with cpp-peglib", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-07-01T00:18:26Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "cef913a4c2e09ba2543a9e68188c94fd93238c19", "body": "Serialize a compiled Grammar to a byte blob and back, so an application can embed a prebuilt blob and skip the meta-parse on startup (deserialize is ~40x faster than load_grammar). Structure only: semantic callbacks are not serialized and are re-applied after load; references resolve by name and fir\n[…]\nser::serialize_grammar()/load_blob(), and a peglint --blob option to emit a blob. Covered by test/test_serialize.cc (18 tests).\n\nClaude-Session: https://claude.ai/code/session_01TonqfjNuon56CkTuSijkof", "is_bot": false, "headline": "Add grammar serialization (GrammarBlob) for fast startup", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T21:55:25Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "646b24caea29e0c836c29fec621060eeea7f462f", "body": "Add spec test cases covering non-ASCII (CJK and Greek) rule names, filling the previously empty spec/tests/unicode/ directory.\n\nClaude-Session: https://claude.ai/code/session_01TonqfjNuon56CkTuSijkof", "is_bot": false, "headline": "Add Unicode identifier conformance tests", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T16:35:34Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "10b9b4123bd82d5c3bf35968ae74a27b3e668b30", "body": "Vendor the culebra grammar under grammar/ for reference and testing.\n\nClaude-Session: https://claude.ai/code/session_01TonqfjNuon56CkTuSijkof", "is_bot": false, "headline": "Add culebra.peg as a reference grammar", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T16:35:33Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "c98721aca0b36b7af0185c0ff52fbc2723844f84", "body": "The built-in symbol table feature (declare_symbol/check_symbol) was removed in #239 due to fundamental limitations (no packrat support, no way to initialize tables before parsing, no nested scopes). An unreachable instruction handler in peglib.h and the disabled SymbolTableTest cases (guarded by the\n[…]\nates the recommended way to do symbol checking via semantic predicates, and move it out of the dead #ifdef so it actually runs.\n\nClaude-Session: https://claude.ai/code/session_01TonqfjNuon56CkTuSijkof", "is_bot": false, "headline": "Remove dead Symbol Table support remnants", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T16:35:20Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "735d475125934362cf1a511700cdd6cc4c77f932", "body": "Port of the cpp-peglib change (d73725f). compute_first_set followed\nreferences with only a path cycle-guard and no result cache, so each rule's\nfirst-set was recomputed every time it was referenced -- O(N^2) for grammars\nwith dense cross-references. Add a first-set cache shared across all rules\nand \n[…]\nimary left-factoring, the packrat-filter\ncycle guard) have no rust-peglib counterpart: rust-peglib parses grammar text\nwith a hand-written recursive-descent parser and has no selective packrat\nfilter.", "is_bot": false, "headline": "rust-peglib: compute first-sets in O(N) by caching per-rule results", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T03:35:37Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "82de941abf27696010299795a15c030f2d2ec848", "body": "A definition and a primary both begin with an identifier whose two forms\n(macro vs plain) share that prefix, so the bootstrap meta-parser scanned the\nidentifier twice: once in the macro alternative (which then failed at the\nparameter/argument list) and again in the plain alternative. First-Set\nfilte\n[…]\n syntax-error reporting for\nmalformed grammars may shift.\n\nload_grammar is ~1.3-1.45x faster (a ~190-rule grammar: 11.0 -> 8.7 ms). Also\nupdate grammar/cpp-peglib.peg, the reference grammar, to match.", "is_bot": false, "headline": "Left-factor the meta-grammar's Definition and Primary rules", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-30T03:05:07Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "1986fc1c970f48f84c2884d29284aa3f759d3892", "body": "First-Set filtering skips parse alternatives whose next byte cannot match,\nbut it was only applied to user grammars in perform_core, not to the\nbootstrap meta-grammar that parses grammar text. Run SetupFirstSets on the\nmeta-grammar in the ParserGenerator constructor so load_grammar benefits too.\n\nSa\n[…]\n repetition, macros, captures/back-references,\nprecedence/ast_name instructions, dictionaries, cut, negated classes and\nignored rules to confirm the meta-parser still compiles the full grammar\nsyntax.", "is_bot": false, "headline": "Apply First-Set filtering to the bootstrap meta-grammar", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-29T23:11:38Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "d73725fa1828de7e9cc3d70281399325be44a0fc", "body": "perform_core created a fresh SetupFirstSets per rule, so each rule\nre-walked every reachable rule to set up first-sets -- O(N^2) for grammars\nwith dense cross-references. Share a single visitor across all rules so its\nfirst-set cache and visited-rule set persist, computing each rule's\nfirst-sets onc\n[…]\n grammars drops ~3.6x at 1600 rules; real\ngrammars are unaffected (already dominated by meta-parse). Add first-set\ntests for a shared sub-rule and a left-recursive rule referenced from\nmultiple rules.", "is_bot": false, "headline": "Compute first-sets in O(N) by sharing the SetupFirstSets visitor", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-29T21:53:49Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "697b5868fe019c80813f665344f0f649342dc126", "body": "Add visited_rules to CollectReachableRules to guard re-entry and avoid\ninfinite recursion when initializing the packrat filter through Holder\ncycles formed by combinator-built grammars. Add a unit test for a\nrecursive combinator grammar with packrat enabled.", "is_bot": false, "headline": "Prevent recursion over Holder cycles in packrat", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-29T15:59:01Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "c5afb20728fb0bd58d2be7246dc90bec67f17b19", "body": null, "is_bot": false, "headline": "Release v1.12.0", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-10T03:46:15Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "806499ca057e8da233f03778dca5ee8c2157cafd", "body": "- Replace the packrat cache (std::map in C++, HashMap in Rust) with\n PackratCache: a flat open-addressing hash table with linear probing,\n fused (position * rule count + rule id) keys, a lazily allocated\n semantic-value array, and input-length-based initial capacity\n- Cache the tracer availabilit\n[…]\nmpute lowercase literals for case-insensitive\n matching (Rust)\n- Use unique_ptr for the semantic value stack\n\nbig.sql parse time vs YACC baseline: 3.4x -> 2.0x (C++);\nTPC-H queries ~17% faster (Rust)", "is_bot": false, "headline": "Speed up packrat parsing with an open-addressing memoization cache", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-10T00:01:49Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "de60491eeb065e81e9cfff40efb20cb87a1be4f9", "body": "find_grammar() only searched \"spec/mini-js/grammar.peg\" with relative\nprefixes \"\", \"../\", \"../../\" from the current working directory. When the\ntest binary runs from a directory that is not 0-2 levels below the repo\nroot (e.g. nested build trees, package builds such as FreeBSD ports), the\ngrammar fi\n[…]\niJsTest cases as Skipped.\n\nPass the absolute grammar path via the MINI_JS_GRAMMAR_PATH compile\ndefinition and use it as the primary candidate, falling back to the\nexisting relative search.\n\nFixes #341", "is_bot": false, "headline": "Fix MiniJsTest being skipped when run from non-standard directories", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-07T22:15:53Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "b68a7b2e81b412239eba0858df813a01e5ca41af", "body": null, "is_bot": false, "headline": "Release v1.11.0", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-06T19:19:52Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "3de6f438cf2cd279b02cf93790a3107057437de8", "body": "- Add CPPPEGLIB_VERSION / CPPPEGLIB_VERSION_NUM macros to peglib.h\n- Add scripts/release.sh (dry-run by default, --run to execute)\n- Add `release` recipe to justfile\n- Add abidiff CI with a header-only ABI probe to drive patch/minor bumps", "is_bot": false, "headline": "Add `just release` versioning workflow", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-06-06T19:08:47Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "4e24d65d46c0a3b8348a9884b0b9328bf5ee9d0e", "body": null, "is_bot": false, "headline": "Update README", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-29T18:06:01Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "aa5ae678ae5bec20e970b864638c1c0e4ac78c9b", "body": null, "is_bot": false, "headline": "Fixed waring", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-29T17:44:01Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "995a39247008e626b05d7c45228c744e14e2f7bf", "body": "A rule (or macro instantiation) annotated `{ ast_name: NodeTag }` emits\nits AST node under NodeTag instead of the rule's own name. This lets two\nparallel productions — e.g. a parameterized rule instantiated for two\nargument sets, or hand-written sibling rules — converge onto a single\nAST tag so a tr\n[…]\nle, opt-in\ndirective in the `{ ... }` block. Default (no instruction) is unchanged\n— nodes keep their rule name. The optimizer's keep-list honors the\noverride so `ast_name` composes with `no_ast_opt`.", "is_bot": false, "headline": "Add `{ ast_name: X }` instruction to override an AST node's tag", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-29T17:31:19Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "8ee939505e6ecdc72902439e53f8ca70d599693f", "body": "When AstOptimizer collapsed a 1-child wrapper into a node derived\nfrom a rule with `no_ast_opt`, the surviving node kept the rule's\nname but its pos/len was overwritten by the outermost collapsed\nwrapper's range. This broke error reporting and source-level\nrewriting for nodes the user explicitly mar\n[…]\nopy\nconstructor. When the flag is set, the collapsed node inherits the\nchild's pos/len instead of adopting the outer rule's range.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \u003cnoreply@anthropic.com>", "is_bot": false, "headline": "Preserve pos/len of no_ast_opt rules through AST collapse", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-28T05:08:26Z", "body_truncated": true, "is_coding_agent": true }, { "oid": "debd063f3cd7a8fba2e7a978687c078786234628", "body": "ComputeFirstSet's per-traversal cache stored results regardless of\nwhether a cycle was hit during the rule's body computation. A cycle\nreturns no contribution, so the cached value is incomplete and unsafe\nto reuse from a different call context. Reusing such a polluted entry\ncould cause a Prioritized\n[…]\nr to use a\npolluted cache.\n\nTrack a cycle counter and skip caching for rules whose computation hit\na cycle. Cycle-free rules are still cached, so the original speedup\nfor non-LR grammars is preserved.", "is_bot": false, "headline": "Fix FirstSet cache pollution under left recursion", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-02T23:19:19Z", "body_truncated": true, "is_coding_agent": false }, { "oid": "b833ef990fcb72d9fbf7fbb54f6ddd7b5b11ed97", "body": "std::optional and std::exchange are used in peglib.h but their headers\nwere not directly included. libc++ pulls them in transitively, but\nlibstdc++ does not, breaking the build on Linux. Reported by the\nculebra project.\n\nCo-Authored-By: Claude Opus 4.7 (1M context) \u003cnoreply@anthropic.com>", "is_bot": false, "headline": "Add missing \u003coptional> and \u003cutility> includes", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-05-02T22:35:19Z", "body_truncated": false, "is_coding_agent": true }, { "oid": "053660bf89c48021b0a9f247326fcd3eb50df103", "body": "Introduce an optional per-traversal FirstSet cache for ComputeFirstSet to share computed FirstSets and avoid exponential re-walks across cross-referenced rules. Add visited_rules_ to SetupFirstSets to skip recomputing PrioritizedChoice::first_sets_ for rules reached multiple times. Cycle handling is preserved.", "is_bot": false, "headline": "Cache first sets and avoid redundant rule visits", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-04-21T04:00:38Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "dffbcb6edd03bf57900802bef0810371c4855733", "body": null, "is_bot": false, "headline": "Add language independent test framework (#339)", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-04-20T01:49:18Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "dcabc63cf4b966eb6f33abd571ae4cda6bf707f0", "body": null, "is_bot": false, "headline": "Fix #338", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-18T02:03:17Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "ae24b6dfc2a42901fa6467b3df4170b0a948bfb4", "body": null, "is_bot": false, "headline": "Refactor variable declaration for clarity in ComputeFirstSet::visit", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-14T02:32:37Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "3e88335f2110f1b681413439cbd90b9dffe2a492", "body": "Signed-off-by: Rui Chen \u003crui@chenrui.dev>", "is_bot": false, "headline": "Add missing \u003coptional> include (#337)", "author_name": "Rui Chen", "author_login": "chenrui333", "committed_at": "2026-03-13T21:02:53Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "60a77c634e81c7fbce7fe949ec9573deff0c64cf", "body": "* Add more tests\n\n* Enhance profiling capabilities and improve Trie performance metrics\n\n* Implement ISpan optimization for ASCII CharacterClass repetition in parsing\n\n* Implement LPeg-style snapshot/rollback for SemanticValues and CaptureScope\n\nReplace push()/pop()/append()/shift_capture_values() w\n[…]\nbclasses to inherit from TraversalVisitor for improved code reuse and maintainability\n\n* Update native.wasm binary to latest version\n\n---------\n\nCo-authored-by: Claude Opus 4.6 \u003cnoreply@anthropic.com>", "is_bot": false, "headline": "Performance Improvement (#336)", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-11T04:02:19Z", "body_truncated": true, "is_coding_agent": true }, { "oid": "3b6f47f7fcc7acc664cc3b75df68b719ea3864e3", "body": "Split test1.cc, test2.cc, test3.cc into 10 descriptive files organized\nby feature area. Added 84 new tests covering previously under-tested\nareas (cut operator, recovery, enter/leave handlers, user-defined rules,\nsemantic predicates, lookahead, token boundary interactions, capture\nscope, character c\n[…]\nture interactions\n- test_left_recursive.cc: left recursion (merged old detection tests)\n- test_first_set.cc: first-set optimization (unchanged)\n\nCo-Authored-By: Claude Opus 4.6 \u003cnoreply@anthropic.com>", "is_bot": false, "headline": "Reorganize test files with descriptive names and add comprehensive tests", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-07T15:53:09Z", "body_truncated": true, "is_coding_agent": true }, { "oid": "9a81a9c7e836b208e092dd9f815dcbc3388a1dd9", "body": "* Fix null pointer dereference in char8_t parse_and_get_value overloads\n\nThe char8_t overloads were passing *path instead of path, which would\ndereference a null pointer when path=nullptr (the default).\n\nCo-Authored-By: Claude Opus 4.6 \u003cnoreply@anthropic.com>\n\n* Add left recursion test cases and gra\n[…]\n() pattern. This eliminates MSVC\noverload ambiguity and simplifies the API.\n\nCo-Authored-By: Claude Opus 4.6 \u003cnoreply@anthropic.com>\n\n---------\n\nCo-authored-by: Claude Opus 4.6 \u003cnoreply@anthropic.com>", "is_bot": false, "headline": "Left recursion new (#335)", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-07T08:13:58Z", "body_truncated": true, "is_coding_agent": true }, { "oid": "a747613edd283f7300a81a0e63c384e78d3407ea", "body": null, "is_bot": false, "headline": "Performance improvement for #316", "author_name": "yhirose", "author_login": "yhirose", "committed_at": "2026-03-07T02:12:06Z", "body_truncated": false, "is_coding_agent": false }, { "oid": "861ecee203564b0fadeb929738da1ac6f36cac2d", "body": "- Introduced a new SQL benchmark query (q1.sql) that aggregates line item data based on return flag and line status, filtering by ship date.\n- Added a grammar definition file (sql.gram) to parse SQL statements, including support for various clauses 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Public record
Software health reportschema 0.27.0 · metrics 2.5.0 · 2026-07-30 08:09 UTC

yhirose / cpp-peglib

A single file C++ header-only PEG (Parsing Expression Grammars) library

C++ · RustMIT★ 1,048 stars⑂ 128 forkssince Feb 2015View on GitHub ↗
#cpp#peg#parsing-expression-grammars#parsing#c-plus-plus#header-only#parser-generator#cpp17

yhirose/cpp-peglib holds a health index of 80 out of 100, placing it in the Excellent band. It scores highest on Engineering Quality (91/100) and lowest on Security (50/100). It was last updated 1 day ago. A single contributor accounts for most of its recent work.

80
overall / 100
Excellent

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

80
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 68 is calibrated to 80 on the published index scale (record calibration 2026-08-02).

Ownership

yhirosePersonal account
1,226 followers58 public repossince Aug 2010

This repository is owned by a personal account. A single-owner project carries more continuity risk than an organization-backed one.

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

82Excellent · 21% of overall

Development activity

70Good
How it's scored
36/36Push recency — last push 1 days ago
7.6/36Commit cadence — 11/52 weeks with commits
16.4/18Commit volume — 66 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 7 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year66
human_commit_share1
days_since_last_push1
active_weeks_last_year11

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 57 releases published
36/36Release recency — latest release 1 days ago
27/27Release cadence — a release every ~15.5 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count57
latest_release_tagv1.15.1
releases_from_tagsno
days_since_latest_release1
mean_days_between_releases15.5
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

63Moderate · 17% of overall

Popularity & adoption

74Good
How it's scored
49/60Stars — 1,048 stars
17.5/25Forks — 128 forks
8/15Watchers — 28 watchers
Inputs used
forks128
stars1,048
watchers28
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

50Moderate
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (MIT)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges—
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateno

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

54Moderate · 23% of overall

Maintainer resilience (bus factor)

24At Risk
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
1.8/22.5Commit distribution — top contributor authored 92% of commits
13.5/13.5Contributor breadth — 23 contributors
0/10OpenSSF Scorecard: Contributors — project has 0 contributing companies or organizations -- score normalized to 0
Inputs used
bus_factor1
contributors_sampled23
top_contributor_share0.919

Issue & PR responsiveness

73Good
How it's scored
41.8/42Issue resolution — 100% of issues closed
21.7/30PR acceptance — 55/76 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0
Inputs used
merged_prs55
open_issues1
closed_issues264
prs_merged_7d—
prs_decided_7d—
prs_merged_30d—
prs_decided_30d—
issue_closed_ratio0.996
closed_unmerged_prs21
first_time_authors_30d—
first_time_prs_merged_30d—
first_time_prs_decided_30d—
Excluded from scoring (no data or not applicable): newcomer_pr_acceptance. Remaining weights renormalized.

Ownership & stewardship

71Good
How it's scored
10/30Ownership backing — personal (user) account
0/20Verified domain — not applicable to user accounts
22.2/25Owner reach — 1,226 followers of yhirose
24.9/25Track record — 58 public repos, account ~15 yr old
Inputs used
followers1,226
owner_typeUser
is_verified—
owner_loginyhirose
public_repos58
account_age_days5,835
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Engineering Quality

Are baseline engineering and documentation practices in place?

91Excellent · 19% of overall

Engineering practices

92Excellent
How it's scored
24/24CI workflows — 2 workflow(s)
24/24Tests present
16/16Linter config
9.6/9.6Pre-commit hooks
0/6.4.editorconfig
0/20OpenSSF Scorecard: CI-Tests — no data
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configyes
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: CI-Tests. Remaining weights renormalized.

Documentation

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage site — https://yhirose.github.io/cpp-peglib/
10/10Repository description
10/10Topics — 8 topics
0/10Wiki
Inputs used
topicscpp, peg, parsing-expression-grammars, parsing, c-plus-plus, header-only, parser-generator, cpp17
has_wikino
homepagehttps://yhirose.github.io/cpp-peglib/
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

50Moderate · 16% of overall

Security posture

38Weak
How it's scored
6.8/7.5Binary-Artifacts — binaries present in source code
0/7.5Branch-Protection — branch protection not enabled on development/release branches
0/2.5CI-Tests — no data
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 0/30 approved changesets -- score normalized to 0
0/2.5Contributors — project has 0 contributing companies or organizations -- score normalized to 0
10/10Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 30 commit(s) and 7 issue activity found in the last 90 days -- score normalized to 10
0/5Packaging — no data
0/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5SAST — no SAST tool detected
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated15
scorecard_versionv5.5.0
checks_inconclusive3
scorecard_aggregate3.8
Excluded from scoring (no data or not applicable): ci_tests, packaging, signed_releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages15
unassessed_packages0
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 15 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

65Good · 4% of overall

Agent context & guidance

38Weak
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
37.9/40Legible commit history — 71 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
legible_history_share0.71
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

82Excellent
How it's scored
18/18One-command bootstrap — justfile, pl0/Makefile
22/22Automated tests
11/11Lint / format config
11/11Static type checking — C++ (statically typed)
10/10Reproducible environment — lockfile
10/10Demonstrated agent practice — 5 of the last 100 commits agent-authored or agent-credited
0/8Automated maintenance — no automated dependency updates observed
0/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesCargo.lock
has_dockerfileno
typed_languageyes
bootstrap_filesjustfile, pl0/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configs—
agent_commit_share0.05
toolchain_manifestsharness/rust/Cargo.toml, rust-peglib/Cargo.toml, rust-peglib/orc-jit/Cargo.toml, rust-peglib/pl0/Cargo.toml
dependency_bot_commit_share0

Code legibility for models

97Exceptional
How it's scored
45/45Type-checkable code — C++ (statically typed)
51.9/55Manageable file sizes — 3/54 source files over 60KB
Inputs used
primary_languageC++
largest_source_bytes223,507
source_files_sampled54
oversized_source_files3

Machine-readable interfaces

40Weak
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)
0/20MCP server
40/40Runnable examples — example, samples
Inputs used
example_dirsexample, samples
has_mcp_signalno
api_schema_files—

Key facts

1,048GitHub stars
23contributors
66commits, last 12 months
1days since last push
57releases
1bus factor
1open issues
crates.iopackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • Could not fetch crates package 'peglib' from its registry
  • Could not fetch crates package 'spec-harness' from its registry
  • Could not fetch crates package 'pl0' from its registry
  • Could not fetch crates package 'orc-jit' from its registry

More detail

Star and fork history 0 ★ / 128 ⇿
0Stars
128Forks
56Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

025507510012512442015-102021-022026-07
Major 1Minor 15Patch 40

Each point covers 10 days.

OpenSSF Scorecard 3.8 / 10
3.8aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-07-30 08:09 UTC

9Binary-Artifactsbinaries present in source code
0Branch-Protectionbranch protection not enabled on development/release branches
n/aCI-Testsno pull request found
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 0/30 approved changesets -- score normalized to 0
0Contributorsproject has 0 contributing companies or organizations -- score normalized to 0
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 7 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTno SAST tool detected
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
10Vulnerabilities0 existing vulnerabilities detected
Direct dependencies 5
RegistryPackageVersion constraintManifest
crates.iopeglib—harness/rust/Cargo.toml
crates.ioregex1harness/rust/Cargo.toml
crates.ioserde_json1harness/rust/Cargo.toml
crates.iopeglib—rust-peglib/pl0/Cargo.toml
crates.ioorc-jit—rust-peglib/pl0/Cargo.toml
All dependencies 15

Full resolved dependency set from the GitHub dependency graph: 2 direct and 13 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
crates.ioregex1.12.3direct
crates.ioserde_json1.0.149direct
crates.ioaho-corasick1.1.4indirect
crates.ioitoa1.0.18indirect
crates.iomemchr2.8.0indirect
crates.ioproc-macro21.0.106indirect
crates.ioquote1.0.45indirect
crates.ioregex-automata0.4.14indirect
crates.ioregex-syntax0.8.10indirect
crates.ioserde1.0.228indirect
crates.ioserde_core1.0.228indirect
crates.ioserde_derive1.0.228indirect
crates.iosyn2.0.117indirect
crates.iounicode-ident1.0.24indirect
crates.iozmij1.0.21indirect
Dependency advisories 0

This repository publishes no package the index resolves, so its own dependency graph was assessed — 15 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct.

No known advisories affect the assessed dependencies.

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

Related records

Inspected repositories sharing catalogue tags or ecosystems with yhirose/cpp-peglib. Read them side by side →

75Neargye/magic_enumStatic reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate codeGood96Project-OSRM/osrm-backendOpen Source Routing Machine - C++ backendExceptional95dennisosrm/project-osrmOpen Source Routing Machine - C++ backendExceptional73antlr/antlr4ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.Good71fktn-k/fkYAMLA C++ header-only YAML libraryGood87pest-parser/pestThe Elegant ParserExcellent

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.5.0, schema v0.27.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics.