module Regexp::Expression::EscapeSequence

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 28
def char
  raise NoMethodError, 'CodepointList responds only to #chars'
end

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 36
def chars
  codepoints.map { |cp| cp.chr('utf-8') }
end

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 4
def codepoint; 0x1B end

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 40
def codepoints
  text.scan(/\h+/).map(&:hex)
end

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 48
def control_sequence_to_s(control_sequence)
  five_lsb = control_sequence.unpack('B*').first[-5..-1]
  ["000#{five_lsb}"].pack('B*')
end

# File lib/regexp_parser/expression/methods/escape_sequence_codepoint.rb, line 53
def meta_char_to_codepoint(meta_char)
  byte_value = meta_char.ord
  byte_value < 128 ? byte_value + 128 : byte_value
end