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News

3.1.8 - 2026-03-31

Improvements

  • TruffleRuby: Added a new implementation for TruffleRuby.

    • GH-194
    • GH-195
    • Patch by Benoit Daloze

  • CRuby: Added support for GC compaction and embedded structs.

    • GH-201
    • Patch by Jean Boussier

Thanks

  • Benoit Daloze

  • Jean Boussier

3.1.7 - 2026-01-06

Fixes

  • JRuby: Restore compatibility with JRuby 9.4 and earlier.
    • GH-185
    • Patch by Karol Bucek

Improvements

  • JRuby: Preserve code range in substrings to avoid recalculating.
    • GH-186
    • Patch by Karol Bucek

Thanks

  • Karol Bucek

3.1.6 - 2025-12-17

Improvements

  • CRuby: Added support for write barrier.

    • GH-156
    • Patch by Daniel Colson

  • Improved documents.

    • GH-162
    • Patch by Burdette Lamar

  • Removed obsoleted methods:

    • StringScanner#clear
    • StringScanner#getbyte
    • StringScanner#peep
    • StringScanner#empty?
    • StringScanner#restsize

  • Deprecated ScanError. Use StringScanner::Error instead.

  • Deprecated StringScanner::Id.

Fixes

  • Fixed broken link in documents.

    • GH-179
    • Patch by Berkan Ünal

  • Fixed broken markup in documents.

    • GH-180
    • Patch by Yuki Kurihara

Thanks

  • Daniel Colson

  • Burdette Lamar

  • Berkan Ünal

  • Yuki Kurihara

3.1.5 - 2025-05-03

Fixes

  • JRuby: StringScanner#scan_integer: Fixed a integer converting problem.

  • JRuby: StringScanner#scan_integer: Added missing length check.

    • GH-152
    • GH-153

Thanks

  • Thomas Leitner

3.1.4 - 2025-04-29

Fixes

  • StringScanner#named_captures: Fixed an incompatible behavior when there are multiple same name groups.
    • GH-145
    • GH-146
    • Reported by Linus Sellberg

Thanks

  • Linus Sellberg

3.1.3 - 2025-04-13

Fixes

  • StringScanner#scan_integer: Fixed a bug that matched data isn't updated.

    • GH-130
    • GH-133
    • Reported by Andrii Konchyn
    • Patch by Jean Boussier

  • StringScanner#scan_until: Fixed a bug that String pattern usage set incorrect match data.

    • GH-131
    • GH-138
    • Reported by Andrii Konchyn
    • Patch by NAITOH Jun

  • StringScanner#scan_integer(base: 16): Fixed a bug that 0x<EOS> and 0x<NON_HEX_DECIMAL> isn't matched.

    • GH-140
    • GH-141
    • Reported by Andrii Konchyn
    • Patch by Jean Boussier

  • Fixed a bug that String pattern doesn't clear named captures.

    • GH-135
    • GH-142
    • Reported by Andrii Konchyn
    • Patch by NAITOH Jun

  • StrinScanner#[]: Fixed a bug that String pattern and unknown capture group name returns nil instead of raising IndexError like Regexp pattern.

    • GH-139
    • GH-143
    • Reported by Benoit Daloze
    • Patch by NAITOH Jun

  • StrinScanner#pos and StrinScanner#pos=: Fixed a bug that position is treated as int not long.

    • GH-147
    • Patch by Jean Boussier

Thanks

  • Andrii Konchyn
  • Jean Boussier
  • NAITOH Jun

3.1.2 - 2024-12-15

Fixes

  • JRuby: Fixed a bug that StringScanner#scan_integer may read out-of-bounds data.

    • GH-125
    • GH-127

  • JRuby: Fixed a wrong StringScanner::Version value bug.

3.1.1 - 2024-12-12

Improvements

  • Added StringScanner#scan_byte

    • GH-89

  • Added StringScanner#peek_byte

    • GH-89

  • Added support for String pattern by the following methods:

    • StringScanner#exist?
    • StringScanner#scan_until
    • StringScanner#skip_until
    • StringScanner#check_until
    • StringScanner#search_full
    • GH-106
    • Patch by NAITOH Jun

  • Improved performance.

    • GH-108
    • GH-109
    • GH-110
    • Patch by NAITOH Jun

  • Improved performance.

    • GH-117

  • Added StringScanner#scan_integer

    • GH-113
    • GH-115
    • GH-116

Thanks

  • NAITOH Jun

3.1.0 - 2024-02-04

Fixes

  • jruby: Fixed a bug that substring can't be used.
    • GH-86
    • GH-87

3.0.9 - 2024-01-21

Improvements

  • jruby: StringScanner#rest: Changed to use the source encoding instead of US-ASCII for empty case.

    • GH-78
    • GH-79
    • GH-80
    • Reported by NAITOH Jun

  • jruby: Dropped support for old Joni.

    • GH-76
    • Patch by Olle Jonsson

  • jruby: StringScanner#scan: Stopped to use shared string for result.

    • GH-83
    • GH-84
    • Reported by NAITOH Jun

Thanks

  • NAITOH Jun

  • Olle Jonsson

3.0.8 - 2024-01-13

Improvements

  • StringScanner#captures: Changed to return nil not "" for unmached capture. Because StringScanner#[] and MatchData#[] does so.
    • GH-72
    • Patched by NAITOH Jun

Thanks

  • NAITOH Jun

3.0.7 - 2023-10-11

Improvements

  • jruby: Added support for fixed anchor.
    • GH-57

Fixes

  • Fixed a crash bug of StringScanner#named_capture on not matched status.
    • GH-61
    • Patch by OKURA Masafumi

Thanks

  • OKURA Masafumi

3.0.6 - 2023-02-08

Improvements

  • doc: Improved StringScanner#rest?. [GH-49] [Patch by OKURA Masafumi]

  • jruby: Added support for joni 2.2. [GH-55]

Thanks

  • OKURA Masafumi

3.0.5 - 2022-12-08

Improvements

  • Added StringScanner#named_captures GitHub#44 GitHub#43 [Patch by Eriko Sugiyama] [Reported by Akim Demaille]

Thanks

  • Eriko Sugiyama

  • Akim Demaille

3.0.4 - 2022-07-24

Improvements

  • Added missing license files to gem. GitHub#41 [Patch by Martin Sander]

Fixes

  • Fixed a StringScanner#scan bug that may not set match result on JRuby. GitHub#45 [Patch by Kiichi Hiromasa]

Thanks

  • Martin Sander

  • Kiichi Hiromasa

3.0.3 - 2022-05-11

Improvements

  • Improved JRuby's release process integration. [GitHub#39][Patch by Charles Oliver Nutter]

Thanks

  • Charles Oliver Nutter

3.0.2 - 2022-05-09

Improvements

  • Improved documentation. [GitHub#32][Patch by David Crosby]

  • Added support for TruffleRuby. [GitHub#35][Patch by Benoit Daloze]

Thanks

  • David Crosby

  • Benoit Daloze

3.0.2.pre1 - 2022-04-19

Improvements

  • Added support for JRuby. [GitHub#25][Patch by Charles Oliver Nutter]

Thanks

  • Charles Oliver Nutter

3.0.1 - 2021-10-23

Fixes

  • Fixed a segmentation of StringScanner#charpos when String#byteslice returns non string value. [Bug #17756][GitHub#20][Patch by Kenichi Kamiya]

Thanks

  • Kenichi Kamiya

1.0.3 - 2019-10-14

Improvements

  • Stopped depending on regint.h.

Fixes

  • Fixed a bug that a build flag is ignored when this is installed by gem install. [GitHub#7][Reported by Michael Camilleri]

Thanks

  • Michael Camilleri

1.0.2 - 2019-10-13

Improvements

  • Added support for String as a pattern. This improves performance. [GitHub#4]

  • Improved documentation. [GitHub#8][Patch by Espartaco Palma]

  • Added tests for anchors. [GitHub#9][Patch by Jeanine Adkisson]

  • Added support for fixed anchor mode. In this mode, \A matches to the beginning of source string instead of the current position. ^ matches to the begging of line instead of the current position.

    You can use fixed anchor mode by passing fixed_anchor: true option to StringScanner.new such as StringScanner.new(string, fixed_anchor: true).

    StringScanner#fixed_anchor? is also added to get whether fixed anchor mode is used or not.

    [GitHub#6][Patch by Michael Camilleri] [GitHub#10]

Thanks

  • Espartaco Palma

  • Michael Camilleri

  • Jeanine Adkisson