class RuboCop::Cop::Style::FrozenStringLiteralComment

comment. The frozen string literal comment is only valid in Ruby 2.3+.
in Ruby 3.0. The comment will be added below a shebang and encoding
enable frozen string literals. Frozen string literals will be default
comment ‘# frozen_string_literal: true` to the top of files to
This cop is designed to help upgrade to Ruby 3.0. It will add the

def autocorrect(_node) 

def autocorrect(_node)
  lambda do |corrector|
    last_special_comment = last_special_comment(processed_source)
    if last_special_comment.nil?
      corrector.insert_before(processed_source.tokens[0].pos,
                              "#{FROZEN_STRING_LITERAL_ENABLED}\n")
    else
      corrector.insert_after(last_special_comment.pos,
                             "\n#{FROZEN_STRING_LITERAL_ENABLED}")
    end
  end
end

def investigate(processed_source) 

def investigate(processed_source)
  return if style == :when_needed && target_ruby_version < 2.3
  return if processed_source.tokens.empty?
  return if frozen_string_literal_comment_exists?(processed_source)
  offense(processed_source)
end

def last_special_comment(processed_source) 

def last_special_comment(processed_source)
  token_number = 0
  if processed_source.tokens[token_number].text.start_with?(SHEBANG)
    token = processed_source.tokens[token_number]
    token_number += 1
  end
  if processed_source.tokens[token_number].text =~
     Encoding::ENCODING_PATTERN
    token = processed_source.tokens[token_number]
  end
  token
end

def offense(processed_source) 

def offense(processed_source)
  last_special_comment = last_special_comment(processed_source)
  last_special_comment ||= processed_source.tokens[0]
  range = source_range(processed_source.buffer, 0, 0)
  add_offense(last_special_comment, range, MSG)
end