class Parser::Lexer

def emit_comment(s = @ts, e = @te) 

def emit_comment(s = @ts, e = @te)
  if @comments
    @comments.push(Parser::Source::Comment.new(range(s, e)))
  end
  if @tokens
    @tokens.push([ :tCOMMENT, [ tok(s, e), range(s, e) ] ])
  end
  nil
end