Method parse_syntax

src/Chain/libraries/glua/lparsercombinator.cpp:1802–1818

        }

        ParseResult ParserContext::parse_syntax(Input &input)
        {
			_get_parsers_having_first_token_cache.clear();
            auto pr = _lua_parser->tryParse(input, 0, false);
            bool success = pr.state() == ParserState::SUCCESS && pr.result()->next_input().pos() >= input.source()->size() && get_error().length() < 1;
            if (!success)
            {
                // 如果pr.state是SUCCESS，则用last_error_token，如果pr.state不是SUCCESS,则用last_match_token
                std::cout << this->simple_token_error() << std::endl;
                pr.set_state(ParserState::FAILURE);
            }
            else
            {
				pr.set_result(pr.result()->invoke_parser_post_callback());
            }
            return pr;
        }

        ParserFunctor *ParserContext::union_parsers(std::vector<ParserFunctor*> &parsers)
        {