Sourced from regexp_parser's changelog.

[2.7.0] - 2023-02-08 - Janosch Müller

Added

• Regexp::Lexer.lex now streams tokens when called with a block
  • it can now take arbitrarily large input, just like Regexp::Scanner
  • this also slightly improves Regexp::Parser.parse performance
  • note: Regexp::Parser.parse still does not and will not support streaming
• improved performance of Subexpression#each_expression
• minor improvements to Regexp::Scanner performance
• overall improvement of parse performance: about 10% for large Regexps

Fixed

• parsing of octal escape sequences in sets, e.g. [\141]
  • thanks to Randy Stauner for the report

[2.6.2] - 2023-01-19 - Janosch Müller

Fixed

• fixed SystemStackError when cloning recursive subexpression calls
  • e.g. Regexp::Parser.parse(/a|b\g<0>/).dup

[2.6.1] - 2022-11-16 - Janosch Müller

Fixed

• fixed scanning of two negative lookbehind edge cases
  • (?<!x)y> used to raise a ScannerError
  • (?<!x>)y used to be misinterpreted as a named group
  • thanks to Sergio Medina for the report

[2.6.0] - 2022-09-26 - Janosch Müller

Fixed

• fixed #referenced_expression for \g<0> (was nil, is now the Root exp)
• fixed #reference, #referenced_expression for recursion level backrefs
  • e.g. (a)(b)\k<-1+1>
  • #referenced_expression was nil, now it is the correct Group exp
• detect and raise for two more syntax errors when parsing String input
  • quantification of option switches (e.g. (?i)+)
  • invalid references (e.g. /\k<1>/)
  • these are a SyntaxError in Ruby, so could only be passed as a String

Added

• Regexp::Expression::Base#human_name
  • returns a nice, human-readable description of the expression

... (truncated)

• 72b4694 Release v2.7.0
• 6502129 Skip check on CI for now
• 07c0073 Fix scanning of octal sequences in sets
• b3ea02a Install ragel during build if needed
• 2e202f3 Fix for old rubies
• 32919d6 Lint
• 3ce02f3 Update docs
• 5e89b0a Remove unused Ragel definitions
• 2f68d8a Remove some redundant copy calls
• 6cf1cdf Remove redundant #pack call
• Additional commits viewable in compare view

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