包含 boost/spirit/include/qi.hpp 的错误

Question

我遇到了与 here 相同的错误。有关长错误消息，请参阅底部的 'compilation info'。基本上，如果我 #include 我无法编译。完全被这个难住了...我正在使用 C++11 在 Debian 上使用 g++ 4.9.3 进行编译。作为参考，错误消息的第一部分是：

In file included from /usr/include/boost/spirit/home/qi/nonterminal/rule.hpp:35:0,
             from /usr/include/boost/spirit/home/qi/nonterminal.hpp:14,
             from /usr/include/boost/spirit/home/qi.hpp:20,
             from /usr/include/boost/spirit/include/qi.hpp:16,
             from prog.cpp:9:
/usr/include/boost/spirit/home/qi/reference.hpp: In instantiation of 'bool boost::spirit::qi::reference<Subject>::parse(Iterator&, const Iterator&, Context&, const Skipper&, Attribute&) const [with Iterator = __gnu_cxx::__normal_iterator<char*, std::basic_string<char> >; Context = boost::spirit::context<boost::fusion::cons<std::basic_string<char>&, boost::fusion::nil_>, boost::spirit::locals<> >; Skipper = boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::space, boost::spirit::char_encoding::ascii> >; Attribute = std::basic_string<char>; Subject = const boost::spirit::qi::rule<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char> >, std::basic_string<char>(), boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal, boost::proto::argsns_::term<boost::spirit::tag::char_code<boost::spirit::tag::space, boost::spirit::char_encoding::ascii> >, 0l>, boost::spirit::unused_type, boost::spirit::unused_type>]':

我的代码其实和上面的例子有点不同：

My::Dictionary Parser::parse( const char * s ) {
  std::string input(s);     // input to parse
  qi_my_protocol grammar;   // create instance of parser
  My::Dictionary msg;      // map to receive results
  bool result = qi::phrase_parse(
    input.begin(),
    input.end(),
    grammar,
    qi::space,
    msg
  ); // returns true if successful
  return msg;
}

Answer 1

您的字符串不是常量，因此迭代器 first 和 last 不是常量迭代器。

要么使 my_Parse 函数不是模板（毕竟，无论如何，您都将语法上的迭代器类型硬编码为 std::string::const_iterator），或者使用实际的迭代器类型实例化语法：

my_grammar<Iterator> g;

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#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>

#include <stdio.h>

namespace qi =       boost::spirit::qi;
namespace ascii =    boost::spirit::ascii;
namespace phoenix =  boost::phoenix;

template <typename Iterator>
struct my_grammar : boost::spirit::qi::grammar<Iterator, std::string(), ascii::space_type>
{

    my_grammar() : my_grammar::base_type(start)
    {
        using qi::alpha;
        using qi::alnum;

        start %=
            (+alpha | +alnum)
            ;
    }

    qi::rule<Iterator, std::string(), ascii::space_type> start;
};

template <typename Iterator>
bool my_Parse(Iterator first, Iterator last, std::string& result)
{
    using boost::spirit::ascii::space;

    my_grammar<Iterator> g;

    bool r = phrase_parse(first, last, g, space, result);

    if (!r || first != last) // fail if we did not get a full match
        return false;

    return r;
}



int main() {
    std::string str;
    while (getline(std::cin, str))
    {
        std::string result = "";
        if (my_Parse(str.begin(), str.end(), result))
        {
            std::cout << "-------------------------\n";
            std::cout << "Parsing succeeded\n";
            std::cout << "got: " << result << std::endl;
            std::cout << "\n-------------------------\n";
        }
        else
        {
            std::cout << "-------------------------\n";
            std::cout << "Parsing failed\n";
            std::cout << "-------------------------\n";
        }
    }
}

包含 boost/spirit/include/qi.hpp 的错误

Error including boost/spirit/include/qi.hpp

boost

g++

boost-spirit

c++11