Added

• Support\Z - anchor to the end of the text before any trailing newlines. (#148)
• Support\O - any character including newlines. (#158)
• The parser can now parse subroutine calls and relative backreferences (but execution is still unsupported). This is preparation for future work. Some new error variants have been added for features which can be parsed but are still otherwise unsupported.
• Backreferences can now be case insensitive. (#160)
• RegexBuilder: Add options formulti_line,ignore_whitespace,dot_matches_new_line (#165)

Fixed

• Fix infinite loop when backtracking limit is hit (#153)
• FixRegexBuilder.case_insensitive not always applying when it should. (#163)
• Thetoy example has had various bugfixes, and unit tests added. (#152,#159)

Added

• Addsplit,splitn methods toRegex to split a string into substrings (#140)
• Addcase_insensitive method toRegexBuilder to force case-insensitive mode (#132)

Changed

• Bump bit-set dependency to 0.8 (#139)

Added

• Support for relative backreferences using\k<-1> (-1 references the
  previous group) (#121)
• Addtry_replacen toRegex which returns aResult instead of panicking
  when matching errors (#130)

Changed

• Switch from regex crate to regex-automata and regex-syntax (lower level APIs)
  to simplify internals (#121)
• Note: Due to above change, more backtracking is done in fancy-regex itself
  instead of regex-automata, and you might get aBacktrackLimitExceeded with
  some patterns that you didn't get before. You can increase the backtrack limit
  usingRegexBuilder::backtrack_limit to help with that.
• Allow escaping some letters in character classes, e.g.[\A] used to error
  but now matches the same as[A] (for compatibility with Oniguruma)
• MSRV (minimum supported Rust version) is now 1.66.1 (from 1.61.0)

Fixed

• Fix index out of bounds panic when parsing unclosed(?( (#125)

Added

• Support forno_std (thestd feature is enabled by default but can be
  disabled if desired) (#111)
• TryFrom&str andString impl forRegex (#115)

Changed

• Error and its components are nowClone (#116)
• MSRV (minimum supported Rust version) is now 1.61.0 (from 1.42.0)

Added

• Support forconditionals: using a regex like
  (?<test>a)?b(?(test)c|d) will try to matchc afterb ifa matched in the capture group named
  test, otherwised afterb ifa wasn't captured into thetest group.

Changed

• Updated parse errors to show the position they occurred at.

Fixed

• Fix panic when backref is used within referenced group itself and
  group end index is not known yet (#103)

Added

• Support for\G (anchor to end of previous match): Using a regex
  like\G\w will match each letter offoo infoo bar but
  nothing else.

Added

• Support for\K (keep out): Using a regex like@\K\w+ will match
  things like@foo but the resulting match text will only include
  foo, keeping out the@.