Method: RegexpExamples::ChargroupParser#parse

Defined in:
lib/regexp-examples/chargroup_parser.rb

#parse ⇒ Object 



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# File 'lib/regexp-examples/chargroup_parser.rb', line 21

def parse
  @charset = []
  @negative = false
  parse_first_chars
  until next_char == "]" do
    case next_char
    when "["
      @current_position += 1
      sub_group_parser = self.class.new(rest_of_string, is_sub_group: true)
      @charset.concat sub_group_parser.result
      @current_position += sub_group_parser.length
    when "-"
      if regexp_string[@current_position + 1] == "]" # e.g. /[abc-]/ -- not a range!
        @charset << "-"
        @current_position += 1
      else
        @current_position += 1
        @charset.concat (@charset.last .. parse_checking_backlash.first).to_a
        @current_position += 1
      end
    when "&"
      if regexp_string[@current_position + 1] == "&"
        @current_position += 2
        sub_group_parser = self.class.new(rest_of_string, is_sub_group: @is_sub_group)
        @charset &= sub_group_parser.result
        @current_position += (sub_group_parser.length - 1)
      else
        @charset << "&"
        @current_position += 1
      end
    else
      @charset.concat parse_checking_backlash
      @current_position += 1
    end
  end

  @charset.uniq!
  @current_position += 1 # To account for final "]"
end