code: def t_singlequote(self, t):
          r"'"
          t.lexer.string_start = t.lexer.lexpos
          t.lexer.string_value = ''
          t.lexer.push_state('singlequote'f t_singlequote(self, t):
          r"'"
          t.lexer.string_start = t.lexer.lexpos
          t.lexer.string_value = ''
          t.lexer.push_state('singlequote')
docs: r"