【发布时间】：2015-12-13 09:26:55
【问题描述】：
使用 Boost Spirit 2 进行开发，我正在尝试关注 example 以便在我的 pgn 解析器中获得进展（稍后将添加语义操作）（另请参阅 related previous question）。但我无法避免编译错误：cpp
#include "pgn_games_extractor.h"
#include <boost/spirit/include/qi.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
#include <tuple>
#include <iostream>
BOOST_FUSION_ADAPT_STRUCT(loloof64::pgn_tag, key, value)
BOOST_FUSION_ADAPT_STRUCT(loloof64::game_move, move_number, white_move, black_move, result)
BOOST_FUSION_ADAPT_STRUCT(loloof64::pgn_game, header, moves)
namespace loloof64 {
namespace qi = boost::spirit::qi;
typedef std::tuple<std::size_t, game_move> move_t;
typedef std::tuple<std::vector<pgn_tag>, std::vector<move_t>> game_t;
typedef std::tuple<std::size_t, std::vector<game_t>> pgn_t;
template <typename Iterator> struct pgn_parser : qi::grammar<Iterator, std::vector<pgn_game>, qi::space_type> {
pgn_parser() : pgn_parser::base_type(games) {
using namespace qi;
CurrentPos<Iterator> filepos;
const std::string no_move;
result.add
("1-0", result_t::white_won)
("0-1", result_t::black_won)
("1/2-1/2", result_t::draw)
("*", result_t::undecided);
quoted_string = '"' >> *~char_('"') >> '"';
tag = '[' >> +alnum >> quoted_string >> ']';
header = +tag;
regular_move = lit("O-O-O") | "O-O" | (+char_("a-hNBRQK") >> +char_("a-h1-8x=NBRQK") >> -lit("e.p."));
single_move = raw [ regular_move >> -char_("+#") ];
full_move = filepos.current_pos >> uint_
>> (lexeme["..." >> attr(no_move)] | "." >> single_move)
>> (single_move | attr(no_move))
>> -result;
game_description = +full_move;
single_game = -header >> game_description;
games = filepos.save_start_pos >> *single_game;
BOOST_SPIRIT_DEBUG_NODES(
(tag)(header)(quoted_string)(regular_move)(single_move)
(full_move)(game_description)(single_game)(games)
)
}
private:
qi::rule<Iterator, pgn_tag(), qi::space_type> tag;
qi::rule<Iterator, std::vector<pgn_tag>, qi::space_type> header;
qi::rule<Iterator, move_t(), qi::space_type> full_move;
qi::rule<Iterator, std::vector<move_t>, qi::space_type> game_description;
qi::rule<Iterator, game_t(), qi::space_type> single_game;
qi::rule<Iterator, pgn_t(), qi::space_type> games;
// lexemes
qi::symbols<char, result_t> result;
qi::rule<Iterator, std::string()> quoted_string;
qi::rule<Iterator> regular_move;
qi::rule<Iterator, std::string()> single_move;
};
}
loloof64::PgnGamesExtractor::PgnGamesExtractor(std::string inputFilePath) {
std::ifstream inputFile(inputFilePath);
parseInput(inputFile);
}
loloof64::PgnGamesExtractor::PgnGamesExtractor(std::istream &inputFile) { parseInput(inputFile); }
loloof64::PgnGamesExtractor::~PgnGamesExtractor() {
// dtor
}
void loloof64::PgnGamesExtractor::parseInput(std::istream &inputFile) {
if (inputFile.fail() || inputFile.bad())
throw new InputFileException("Could not read the input file !");
typedef boost::spirit::istream_iterator It;
loloof64::pgn_parser<It> parser;
std::vector<loloof64::pgn_game> temp_games;
It iter(inputFile >> std::noskipws), end;
//////////////////////////////////
std::cout << "About to parse the file" << std::endl;
//////////////////////////////////
bool success = boost::spirit::qi::phrase_parse(iter, end, parser, boost::spirit::qi::space, temp_games);
//////////////////////////////////
std::cout << "Finished to parse the file" << std::endl;
//////////////////////////////////
if (success && iter == end) {
games.swap(temp_games);
} else {
std::string error_fragment(iter, end);
throw PgnParsingException("Failed to parse the input at :'" + error_fragment + "' !");
}
}
和头文件：header.
#ifndef PGNGAMESEXTRACTOR_HPP
#define PGNGAMESEXTRACTOR_HPP
#include <string>
#include <vector>
#include <fstream>
#include <stdexcept>
#include <boost/fusion/adapted/std_tuple.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/repository/include/qi_iter_pos.hpp>
namespace loloof64 {
namespace phx = boost::phoenix;
namespace qi = boost::spirit::qi;
/*
* This class has been taken from http://marko-editor.com/articles/position_tracking/
*/
template<typename Iterator>
struct CurrentPos {
CurrentPos() {
save_start_pos = qi::omit[boost::spirit::repository::qi::iter_pos[
phx::bind(&CurrentPos::setStartPos, this, qi::_1)]];
current_pos = boost::spirit::repository::qi::iter_pos[
qi::_val = phx::bind(&CurrentPos::getCurrentPos, this, qi::_1)];
}
qi::rule<Iterator> save_start_pos;
qi::rule<Iterator, std::size_t()> current_pos;
private:
void setStartPos(const Iterator &iterator) {
start_pos_ = iterator;
}
std::size_t getCurrentPos(const Iterator &iterator) {
return std::distance(start_pos_, iterator);
}
Iterator start_pos_;
};
enum result_t { white_won, black_won, draw, undecided };
struct pgn_tag {
std::string key;
std::string value;
};
struct game_move {
unsigned move_number;
std::string white_move;
std::string black_move;
result_t result;
};
struct pgn_game {
std::vector<pgn_tag> header;
std::vector<game_move> moves;
};
class PgnGamesExtractor {
public:
PgnGamesExtractor(std::string inputFilePath);
PgnGamesExtractor(std::istream &inputFile);
/*
Both constructos may throw PgnParsingException (if bad pgn format) and InputFileException (if missing file)
*/
std::vector<pgn_game> getGames() const { return games; }
virtual ~PgnGamesExtractor();
protected:
private:
std::vector<pgn_game> games;
void parseInput(std::istream &inputFile);
};
class PgnParsingException : public virtual std::runtime_error {
public:
PgnParsingException(std::string message) : std::runtime_error(message) {}
};
class InputFileException : public virtual std::runtime_error {
public:
InputFileException(std::string message) : std::runtime_error(message) {}
};
}
#endif // PGNGAMESEXTRACTOR_HPP
我没有发布编译错误，因为错误太多并且文件很容易测试。
【问题讨论】：
标签： c++ boost boost-spirit