相关疑难解决方法(0)

在boost :: spirit中,我添加了基于示例roman的错误处理代码.

#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_fusion.hpp>
#include <boost/spirit/include/phoenix_object.hpp>
#include <boost/foreach.hpp>

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

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

template <typename Iterator>
struct roman : qi::grammar<Iterator>
{
  roman() : roman::base_type(start)
  {
    using qi::eps;
    using qi::lit;
    using qi::lexeme;
    using qi::_val;
    using qi::_1;
    using ascii::char_;

    // for on_error
    using qi::on_error;
    using qi::fail;
    using phoenix::construct;
    using phoenix::val;

    start = +(lit('M') )  >> "</>";

    on_error<fail>
    (
        start
      , …