class Regexp::Expression::Base

def repetitions
  @repetitions ||=
    if quantified?
      min = quantifier.min
      max = quantifier.max < 0 ? Float::INFINITY : quantifier.max
      range = min..max
      # fix Range#minmax on old Rubies - https://bugs.ruby-lang.org/issues/15807
      if RUBY_VERSION.to_f < 2.7
        range.define_singleton_method(:minmax) { [min, max] }
      end
      range
    else
      1..1
    end
end