CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog. This project adheres to Semantic Versioning, with the exception that 0.x versions can break between minor versions.

0.13.0 - 2023-12-22

Added

• Support for relative backreferences using \k<-1> (-1 references the previous group) (#121)
• Add try_replacen to Regex which returns a Result 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)
• 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)

0.12.0 - 2023-11-11

Added

• Support for no_std (the std feature is enabled by default but can be disabled if desired) (#111)
• TryFrom &str and String impl for Regex (#115)

Changed

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

0.11.0 - 2023-01-12

Added

• Support for conditionals: using a regex like (?<test>a)?b(?(test)c|d) will try to match c after b if a matched in the capture group named test, otherwise d after b if a wasn't captured into the test 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)

0.10.0 - 2022-04-28

Added

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

0.9.0 - 2022-04-21

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 @.

0.8.0 - 2022-02-22

Added

• Allow users to disable any of the unicode and perf-* features of the regex crate. Disabling these features can reduce compile time and/or binary size for use cases where these features are not needed. (All features remain enabled by default.)

Changed

• MSRV (minimum supported Rust version) is now 1.42.0 (from 1.41.1)

0.7.1 - 2021-07-29

Fixed

• Fix panic on incomplete escape sequences in input regexes
• Disallow quantifers on lookarounds and other zero-width assertion expressions, e.g. the + in (?=hello)+

0.7.0 - 2021-07-12

Added

• Regex now has replace methods like the regex crate:
  • replace - single replacement
  • replace_all - replace all non-overlapping matches
  • replacen - configurable number of replacements

0.6.0 - 2021-05-17

Added

• Regex now implements Clone, Display, FromStr
• Captures now implements Index<usize> to access captures by number and Index<&str> to access by name

0.5.0 - 2021-02-15

Added

• Methods find_iter and captures_iter to iterate over all non-overlapping matches for a string
• Method find_from_pos to find starting from a specific position

Changed

• MSRV (minimum supported Rust version) is now 1.41.1 (from 1.32.0)

0.4.1 - 2020-11-09

Added

• escape function to escape special characters in a string so that it matches literally

0.4.0 - 2020-09-27

Added

• Support for named groups and backrefs:
  • Capture with (?<name>...) or (?P<name>...)
  • Backref with \k<name> or (?P=name)
  • Captures::name to get matched group by name
  • Regex::capture_names to get capture names in regex
• Support for expanding matches using a replacement template string
  • Captures::expand for regex crate compatible syntax
  • See Expander for python-compatible syntax and advanced usage
• Match::range and some From impls for convenience

0.3.5 - 2020-04-28

Changed

• Include string snippet in errors for unknown group and invalid escape to make it easier to identify the problem.

0.3.4 - 2020-04-28

Added

• Support comments using (?# comment) syntax
• Support unicode escapes like \u21D2 and \U0001F60A

0.3.3 - 2020-02-28

Changed

• Optimization: Delegate const-sized suffixes in more cases
• Optimization: Use captures_read_at when delegating to regex crate

0.3.2 - 2020-02-05

Fixed

• Some regexes with fancy parts in the beginning/middle didn't match when they should have, e.g. ((?!x)(a|ab))c didn't match abc.

0.3.1 - 2019-12-09

Added

• Add delegate_size_limit and delegate_dfa_size_limit to RegexBuilder to allow configuring these limits for regex crate.

0.3.0 - 2019-11-27

Added

• Add limit for backtracking so that execution errors instead of running for a long time in case of catastrophic backtracking.
• Add RegexBuilder with backtrack_limit to configure the new backtrack limit per regex.
• Error now implements std::error::Error trait

Fixed

• Fix panic in backref matching with multibyte chars

0.2.0 - 2019-10-19

Added

• More documentation and examples
• Support character class nesting and intersections (implemented in regex crate)
• Support atomic groups, both the the (?>foo) group syntax and the a++, a*+ and a?+ possessive syntax
• Support \b, \f, \t, \n, \r, \v
• Support look-behind with variable sized alternative
• Implement Debug for Regex
• More test coverage including running one of Oniguruma's test suites

Changed

• Change find to return a Match struct (breaking change)
• Change Captures API (breaking change):
  • Replace at and pos with get that returns a Match struct
  • Remove is_empty (use len)
• Allow unescaped ] and } as literals
• Allow unescaped { as literal when not after atom
• Allow escapes such as \< or \e inside character classes
• Allow up to 8 characters in \x{...} escape
• Allow escaping of space to make literal space
• Allow (a|)
• Reject invalid backreferences

Fixed

• Multiple fixes for alternatives in look-arounds
• Fix hex escape to not include letters after "F"
• Fix handling of unescaped ] in character classes
• Fix case insensitive character classes and other escapes
• Don't ignore spaces in character classes even with "comment mode"

0.1.0 - 2017-02-06

Added

• Initial release