8 Commits

Author	SHA1	Message	Date
Yukihiro "Matz" Matsumoto	8624764bca	mruby-regexp: implement gsub/sub/scan core in C ... Move the match loop for non-block gsub, sub, and scan from Ruby to C. Key improvements: - re_exec called directly in a loop without MatchData per match - MatchData created only once (for $~ of the last match) - Replacement \-escapes processed in C (apply_replacement) - No intermediate string objects for pre_match/post_match - Block variants remain in Ruby to avoid VM callbacks Performance improvement (vs CRuby ratio): gsub simple: 5.0x -> 2.9x scan words: 5.8x -> 1.9x Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:34 +09:00
Yukihiro "Matz" Matsumoto	13e63657a4	mruby-regexp: use array join in __sub_replace to avoid O(n^2) ... Same pattern as the earlier gsub fix: collect parts in an array and join at the end instead of repeated string concatenation. Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:33 +09:00
Yukihiro "Matz" Matsumoto	4ded345ebb	mruby-regexp: use array join in gsub to avoid O(n^2) concatenation ... Collect replacement parts in an array and join at the end instead of repeated string += which creates intermediate string objects. Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:31 +09:00
Yukihiro "Matz" Matsumoto	5a158d32a8	mruby-regexp: support \& \` \' \+ \\ in sub/gsub replacements ... Replacement strings now support: \& = full match, \` = pre_match, \' = post_match, \+ = last successful capture, \\ = literal backslash. Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:31 +09:00
Yukihiro "Matz" Matsumoto	893cb4edc4	mruby-regexp: fix Regexp#options to return Ruby constant values ... Internal flags (MULTILINE=2, DOTALL=4, EXTENDED=8) differ from Ruby constants (EXTENDED=2, MULTILINE=4). Convert in C instead of returning raw internal flags. Also add Regexp#casefold?. Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:30 +09:00
Yukihiro "Matz" Matsumoto	7283560215	mruby-regexp: add named captures (?<name>...) ... support named capture groups in patterns: - compiler parses (?<name>...) syntax and builds name table - MatchData#[:name] and MatchData#["name"] access by name - MatchData#named_captures returns {name => value} hash - Regexp#named_captures returns {name => group_number} hash - named captures stored in mrb_regexp_pattern for GC safety Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:28 +09:00
Yukihiro "Matz" Matsumoto	3bfb27b999	mruby-regexp: add /regex/ literal support, $~, Regexp.compile ... - /regex/ literal syntax now works (compiler generates Regexp.compile) - Regexp#match and Regexp#=~ set $~ global variable - Regexp.last_match(n) for accessing capture groups - Regexp.compile as alias for Regexp.new - Regexp#options Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:27 +09:00
Yukihiro "Matz" Matsumoto	1cfa153ff3	mruby-regexp: add built-in regexp engine with Pike VM ... implement a lightweight NFA-based regular expression engine for mruby: engine (src/re_compile.c, src/re_exec.c, src/re_utf8.c): - Pike VM (Thompson NFA simulation) with O(n*m) time guarantee - ReDoS-resistant by design (no backtracking for basic patterns) - supports: literals, ., *, +, ?, {n,m}, [], [^], |, () - character classes: \d, \w, \s and negations - anchors: ^, $, \A, \z, \Z, \b, \B - flags: i (ignorecase), m (multiline/dotall) - captures with MatchData Ruby API (src/regexp.c, mrblib/string_regexp.rb): - Regexp.new, #match, #match?, #=~, #===, #source, #inspect - Regexp.escape, Regexp::IGNORECASE/MULTILINE constants - MatchData#[], #captures, #to_a, #begin, #end, #pre_match, #post_match - String#match, #match?, #=~, #sub, #gsub, #scan, #split ~1700 lines of C + ~120 lines of Ruby. no external dependencies. Co-authored-by: Claude <noreply@anthropic.com>	2026-04-23 19:25:27 +09:00