Log Message:
devel/ruby-regexp_parser: update to 2.8.0

2.8.0 (2023-04-17)

Added

o Regexp::Expression::Shared#ends_at
  * e.g. parse(/a +/x)[0].ends_at # => 3
  * e.g. parse(/a +/x)[0].ends_at(include_quantifier = false) # => 1
o Regexp::Expression::Shared#{capturing?,comment?}
  * previously only available on capturing and comment groups
o Regexp::Expression::Shared#{decorative?}
  * true for decorations: comment groups as well as comments and whitespace
    in x-mode
o Regexp::Expression::Shared#parent
o new format argument :original for Regexp::Expression::Base#to_s
  * includes decorative elements between node and its quantifier
  * e.g. parse(/a (?#comment) +/x)[0].to_s(:original) # => "a \ 
(?#comment) +"
  * using it is not needed when calling Root#to_s as Root can't be
    quantified

o support calling Subexpression#{each_expression,flat_map} with a
  one-argument block
  * in this case, only the expressions are passed to the block, no indices
o support calling test methods at Expression class level
  * capturing?, comment?, decorative?, referential?, terminal?
  * e.g. Regexp::Expression::CharacterSet.terminal? # => false

Fixed

o Regexp::Expression::Shared#full_length with whitespace before quantifier
  * e.g. parse(/a +/x)[0].full_length used to yield 2, now it yields 3
o Subexpression#to_s output with children with whitespace before their
  quantifier
  * e.g. parse(/a + /x).to_s used to yield "a+  ", now it yields \ 
"a + "
  * calling #to_s on sub-nodes still omits such decorative interludes by
    default
      - use new #to_s format :original to include it
      - e.g. parse(/a + /x)[0].to_s(:original) # => "a +"
o fixed Subexpression#te behaving differently from other expressions
  * only Subexpression#te used to include the quantifier
  * now #te is the end index without quantifier, as for other expressions
o fixed NoMethodError when calling #starts_at or #ts on empty sequences
  * e.g. Regexp::Parser.parse(/|/)[0].starts_at
  * e.g. Regexp::Parser.parse(/[&&]/)[0][0].starts_at
o fixed nested comment groups breaking local x-options
  * e.g. in /(?x:(?#hello)) /, the x-option wrongly applied to the
    whitespace
o fixed nested comment groups breaking conditionals
  * e.g. in /(a)(?(1)b|c(?#hello)d)e/, the 2nd conditional branch included
    "e"
o fixed quantifiers after comment groups being mis-assigned to that group
  * e.g. in /a(?#foo){3}/ (matches 'aaa')
o fixed Scanner accepting two cases of invalid Regexp syntax
  * unmatched closing parentheses ()) and k-backrefs with number 0 (\k<0>)
  * these are a SyntaxError in Ruby, so could only be passed as a String
  * they now raise a Regexp::Scanner::ScannerError
o fixed some scanner errors not inheriting from
  Regexp::Scanner::ScannerError
o reduced verbosity of inspect / pretty print output