boost spirit x3

Bir struct parse etmek için şöyle yaparız.

//#define BOOST_SPIRIT_X3_DEBUG

#include <fstream>
#include <iostream>
#include <string>
#include <type_traits>
#include <vector>

#include <boost/fusion/include/adapt_struct.hpp>
#include <boost/fusion/include/io.hpp>
#include <boost/spirit/home/x3.hpp>
#include <boost/spirit/home/x3/support/ast/variant.hpp>

namespace x3 = boost::spirit::x3;

struct person
{
    std::string name;
    std::vector<std::string> friends;
};

BOOST_FUSION_ADAPT_STRUCT(
    person,
    (std::string, name)
    (std::vector<std::string>, friends)
);

auto const name = x3::rule<struct name_class, std::string> { "name" }
                = x3::raw[x3::lexeme[x3::alpha >> *x3::alnum]];

auto const root = x3::rule<struct person_class, person> { "person" }
                = name >> *name;

int main(int, char**)
{
  std::string const input = "bob john ellie";
  auto it = input.begin();
  auto end = input.end();

  person p;
  if (phrase_parse(it, end, root >> x3::eoi, x3::space, p))
  {
    std::cout << "parse succeeded" << std::endl;
    std::cout << p.name << " has " << p.friends.size() << " friends."
              << std::endl;
  }
  else
  {
    std::cout << "parse failed" << std::endl;
    if (it != end)
      std::cout << "remaining: " << std::string(it, end) << std::endl;
  }

  return 0;
}