code: def p_wait_statement(self, p):
          'wait_statement : WAIT LPAREN cond RPAREN waitcontent_statement'
          p[0] = WaitStatement(p[3], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1)f p_wait_statement(self, p):
          'wait_statement : WAIT LPAREN cond RPAREN waitcontent_statement'
          p[0] = WaitStatement(p[3], p[5], lineno=p.lineno(1))
          p.set_lineno(0, p.lineno(1))
docs: wait_statement : WAIT LPAREN cond RPAREN waitcontent_statement