由于Boost Spirit库，我设法解析了一个pgn文件，但是只要有一些我没有预期的字符就会失败＃34;
这是我的精神语法：
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
BOOST_FUSION_ADAPT_STRUCT(
loloof64::pgn_tag,
(std::string, key),
(std::string, value)
)
BOOST_FUSION_ADAPT_STRUCT(
loloof64::game_move,
(unsigned, move_number),
(std::string, move_turn),
(std::string, white_move),
(std::string, black_move),
(std::string, result)
)
BOOST_FUSION_ADAPT_STRUCT(
loloof64::pgn_game,
(std::vector<loloof64::pgn_tag>, header),
(std::vector<loloof64::game_move>, moves)
)
namespace loloof64 {
namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
namespace phoenix = boost::phoenix;
template <typename Iterator>
struct pgn_parser : qi::grammar<Iterator, std::vector<pgn_game>, qi::unused_type>
{
pgn_parser() : pgn_parser::base_type(games)
{
using qi::lexeme;
using ascii::char_;
using qi::uint_;
using qi::alnum;
using qi::space;
using qi::omit;
using qi::eol;
using qi::lit;
quoted_string %= lexeme[lit('"') >> *(char_ - '"') >> lit('"')];
tag %=
'['
>> +alnum
>> omit[+space]
>> quoted_string
>> ']'
>> omit[+eol]
;
header %= +tag;
move_turn %= qi::string("...") | qi::string(".");
regular_move %=
+char_("a-hNBRQK")
>> +char_("a-h1-8x=NBRQK")
>> -qi::string("e.p.")
;
castle_move %= qi::string("O-O-O") | qi::string("O-O");
single_move %=
(regular_move | castle_move) >> -(char_('+') | char_('#'))
;
result %= qi::string("1-0") | qi::string("0-1") | qi::string("1/2-1/2") | qi::string("*");
full_move %=
uint_
>> move_turn
>> omit[*space]
>> single_move
>> -(omit[+space] >> single_move)
>> -(omit[+space] >> result)
;
game_description %= full_move
>> *(omit[*space] >> full_move);
single_game %=
-header
>> game_description
;
games %=
single_game
>> *(omit[*(space|eol)] >> single_game)
;
}
qi::rule<Iterator, pgn_tag(), qi::unused_type> tag;
qi::rule<Iterator, std::vector<pgn_tag>, qi::unused_type> header;
qi::rule<Iterator, std::string(), qi::unused_type> quoted_string;
qi::rule<Iterator, std::string(), qi::unused_type> result;
qi::rule<Iterator, std::string(), qi::unused_type> regular_move;
qi::rule<Iterator, std::string(), qi::unused_type> castle_move;
qi::rule<Iterator, std::string(), qi::unused_type> single_move;
qi::rule<Iterator, std::string(), qi::unused_type> move_turn;
qi::rule<Iterator, game_move(), qi::unused_type> full_move;
qi::rule<Iterator, std::vector<game_move>, qi::unused_type> game_description;
qi::rule<Iterator, pgn_game, qi::unused_type> single_game;
qi::rule<Iterator, std::vector<pgn_game>, qi::unused_type> games;
};
}
我怎么能简单地消费任何我无法预料到的人物＃34; ？我的意思是，我怎么能忽略任何我不想要的语法规则？
至于测试目的：
这里是我的解析器头文件（pgn_games_extractor.hpp）
#ifndef PGNGAMESEXTRACTOR_HPP
#define PGNGAMESEXTRACTOR_HPP
#include <string>
#include <vector>
#include <fstream>
#include <stdexcept>
namespace loloof64 {
struct pgn_tag {
std::string key;
std::string value;
};
struct game_move {
unsigned move_number;
std::string move_turn;
std::string white_move;
std::string black_move;
std::string result;
};
struct pgn_game {
std::vector<pgn_tag> header;
std::vector<game_move> moves;
};
class PgnGamesExtractor
{
public:
PgnGamesExtractor(std::string inputFilePath);
PgnGamesExtractor(std::ifstream &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::ifstream &inputFile);
};
class PgnParsingException : public std::runtime_error
{
public:
PgnParsingException(std::string message): std::runtime_error(message){}
};
class InputFileException : public std::runtime_error
{
public:
InputFileException(std::string message) : std::runtime_error(message){}
};
}
#endif // PGNGAMESEXTRACTOR_HPP
这是我的解析器源代码（pgn_games_extractor.cpp）：
#include "pgn_games_extractor.hpp"
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
BOOST_FUSION_ADAPT_STRUCT(
loloof64::pgn_tag,
(std::string, key),
(std::string, value)
)
BOOST_FUSION_ADAPT_STRUCT(
loloof64::game_move,
(unsigned, move_number),
(std::string, move_turn),
(std::string, white_move),
(std::string, black_move),
(std::string, result)
)
BOOST_FUSION_ADAPT_STRUCT(
loloof64::pgn_game,
(std::vector<loloof64::pgn_tag>, header),
(std::vector<loloof64::game_move>, moves)
)
namespace loloof64 {
namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
namespace phoenix = boost::phoenix;
template <typename Iterator>
struct pgn_parser : qi::grammar<Iterator, std::vector<pgn_game>, qi::unused_type>
{
pgn_parser() : pgn_parser::base_type(games)
{
using qi::lexeme;
using ascii::char_;
using qi::uint_;
using qi::alnum;
using qi::space;
using qi::omit;
using qi::eol;
using qi::lit;
quoted_string %= lexeme[lit('"') >> *(char_ - '"') >> lit('"')];
tag %=
'['
>> +alnum
>> omit[+space]
>> quoted_string
>> ']'
>> omit[+eol]
;
header %= +tag;
move_turn %= qi::string("...") | qi::string(".");
regular_move %=
+char_("a-hNBRQK")
>> +char_("a-h1-8x=NBRQK")
>> -qi::string("e.p.")
;
castle_move %= qi::string("O-O-O") | qi::string("O-O");
single_move %=
(regular_move | castle_move) >> -(char_('+') | char_('#'))
;
result %= qi::string("1-0") | qi::string("0-1") | qi::string("1/2-1/2") | qi::string("*");
full_move %=
uint_
>> move_turn
>> omit[*space]
>> single_move
>> -(omit[+space] >> single_move)
>> -(omit[+space] >> result)
;
game_description %= full_move
>> *(omit[*space] >> full_move);
single_game %=
-header
>> game_description
;
games %=
single_game
>> *(omit[*(space|eol)] >> single_game)
;
}
qi::rule<Iterator, pgn_tag(), qi::unused_type> tag;
qi::rule<Iterator, std::vector<pgn_tag>, qi::unused_type> header;
qi::rule<Iterator, std::string(), qi::unused_type> quoted_string;
qi::rule<Iterator, std::string(), qi::unused_type> result;
qi::rule<Iterator, std::string(), qi::unused_type> regular_move;
qi::rule<Iterator, std::string(), qi::unused_type> castle_move;
qi::rule<Iterator, std::string(), qi::unused_type> single_move;
qi::rule<Iterator, std::string(), qi::unused_type> move_turn;
qi::rule<Iterator, game_move(), qi::unused_type> full_move;
qi::rule<Iterator, std::vector<game_move>, qi::unused_type> game_description;
qi::rule<Iterator, pgn_game, qi::unused_type> single_game;
qi::rule<Iterator, std::vector<pgn_game>, qi::unused_type> games;
};
}
loloof64::PgnGamesExtractor::PgnGamesExtractor(std::string inputFilePath)
{
std::ifstream inputFile(inputFilePath);
parseInput(inputFile);
}
loloof64::PgnGamesExtractor::PgnGamesExtractor(std::ifstream &inputFile)
{
parseInput(inputFile);
}
loloof64::PgnGamesExtractor::~PgnGamesExtractor()
{
//dtor
}
void loloof64::PgnGamesExtractor::parseInput(std::ifstream &inputFile)
{
using namespace std;
if (! inputFile) throw InputFileException("File does not exist !");
string content("");
getline(inputFile, content, (char) inputFile.eof());
if (inputFile.fail() || inputFile.bad()) throw new InputFileException("Could not read the input file !");
loloof64::pgn_parser<string::const_iterator> parser;
std::vector<loloof64::pgn_game> temp_games;
string::const_iterator iter = content.begin();
string::const_iterator end = content.end();
bool success = boost::spirit::qi::phrase_parse(iter, end, parser, boost::spirit::qi::eol, temp_games);
if (success && iter == end)
{
games = temp_games;
}
else
{
string error_fragment(iter, end);
string error_message("");
error_message = "Failed to parse the input at :'" + error_fragment + "' !";
throw PgnParsingException(error_message);
}
}
我问这个问题，因为我无法解析以下pgn：ScotchGambitPgn.zip。我认为这是因为该文件存在编码问题。
我正在使用Spirit 2和C ++ 11（Gnu）
答案 0 :(得分：3)
按要求简单的X3翻译。
输出完全相同（确切）。
<强> Live On Coliru
//#define BOOST_SPIRIT_DEBUG
#ifndef PGNGAMESEXTRACTOR_HPP
#define PGNGAMESEXTRACTOR_HPP
#include <string>
#include <vector>
#include <fstream>
#include <stdexcept>
namespace loloof64 {
struct pgn_tag {
std::string key;
std::string value;
};
struct game_move {
unsigned move_number;
std::string white_move;
std::string black_move;
enum result_t { white_won, black_won, draw, undecided } 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
#include <boost/spirit/home/x3.hpp>
#include <boost/spirit/include/support_istream_iterator.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
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 pgn_parser {
using namespace boost::spirit::x3;
static std::string const no_move;
static auto const result = []{
symbols<game_move::result_t> table;
table.add
("1-0", game_move::white_won)
("0-1", game_move::black_won)
("1/2-1/2", game_move::draw)
("*", game_move::undecided);
return table;
}();
static auto const quoted_string = lexeme['"' >> *~char_('"') >> '"'];
static auto const tag = '[' >> +alnum >> quoted_string >> ']';
static auto const header = +tag;
static auto const regular_move = as_parser("O-O-O") | "O-O" | (+char_("a-hNBRQK") >> +char_("a-h1-8x=NBRQK") >> -lit("e.p."));
static auto const single_move = rule<struct single_move_, std::string> { "single_move" }
= raw [ lexeme [ regular_move >> -char_("+#")] ];
static auto const full_move = rule<struct full_move_, game_move> { "full_move" }
= uint_
>> (lexeme["..." >> attr(no_move)] | "." >> single_move)
>> (single_move | attr(no_move))
>> -result;
static auto const game_description = +full_move;
static auto const single_game = rule<struct single_game_, pgn_game> { "single_game" }
= -header >> game_description;
static auto const games = *single_game;
}
}
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;
std::vector<loloof64::pgn_game> temp_games;
It iter(inputFile >> std::noskipws), end;
bool success = boost::spirit::x3::phrase_parse(iter, end, pgn_parser::games, boost::spirit::x3::space, temp_games);
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 + "' !");
}
}
#include <iostream>
int main() {
loloof64::PgnGamesExtractor pge("ScotchGambit.pgn");
std::cout << "Parsed " << pge.getGames().size() << " games\n";
for (auto& g : pge.getGames())
for (auto& m : g.moves)
std::cout << m.move_number << ".\t" << m.white_move << "\t" << m.black_move << "\n";
}
答案 1 :(得分：2)
确实问题出在Veronica身上。或者，实际上，它与Ver？nica有关。哪里？是代码单元<93> - 缺少代码页/编码信息可能意味着什么。
您正在使用ascii::char，这只需要7位字符。
通过更改
轻松修复它using ascii::char_;
到
using qi::char_;
答案 2 :(得分：2)
对于它的价值，这里有很大的简化：
<强> Live On Coliru
//#define BOOST_SPIRIT_DEBUG
#ifndef PGNGAMESEXTRACTOR_HPP
#define PGNGAMESEXTRACTOR_HPP
#include <string>
#include <vector>
#include <fstream>
#include <stdexcept>
namespace loloof64 {
struct pgn_tag {
std::string key;
std::string value;
};
struct game_move {
unsigned move_number;
std::string white_move;
std::string black_move;
enum result_t { white_won, black_won, draw, undecided } 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
#include <boost/spirit/include/qi.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
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;
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;
const std::string no_move;
result.add
("1-0", game_move::white_won)
("0-1", game_move::black_won)
("1/2-1/2", game_move::draw)
("*", game_move::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 = uint_
>> (lexeme["..." >> attr(no_move)] | "." >> single_move)
>> (single_move | attr(no_move))
>> -result;
game_description = +full_move;
single_game = -header >> game_description;
games = *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, game_move(), qi::space_type> full_move;
qi::rule<Iterator, std::vector<game_move>, qi::space_type> game_description;
qi::rule<Iterator, pgn_game, qi::space_type> single_game;
qi::rule<Iterator, std::vector<pgn_game>, qi::space_type> games;
// lexemes
qi::symbols<char, game_move::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;
bool success = boost::spirit::qi::phrase_parse(iter, end, parser, boost::spirit::qi::space, temp_games);
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 + "' !");
}
}
int main() {
loloof64::PgnGamesExtractor pge(std::cin); // "ScotchGambit.pgn"
std::cout << "Parsed " << pge.getGames().size() << " games\n";
for (auto& g : pge.getGames())
for (auto& m : g.moves)
std::cout << m.move_number << ".\t" << m.white_move << "\t" << m.black_move << "\n";
}
注意：
boost::spirit::istream_iterator）raw[]）no_move）istream&代替ifstream&）可能还有其他一些我忘了的事情。输出就是例如。
Parsed 6166 games
1. e4 e5
2. Nf3 Nc6
3. d4 exd4
4. Bc4 Qf6
5. O-O d6
6. Ng5 Nh6
7. f4 Be7
8. e5 Qg6
9. exd6 cxd6
10. c3 dxc3
11. Nxc3 O-O
12. Nd5 Bd7
13. Rf3 Bg4
14. Bd3 Bxf3
15. Qxf3 f5
16. Bc4 Kh8
17. Nxe7 Nxe7
18. Qxb7 Qf6
19. Be3 Rfb8
20. Qd7 Rd8
21. Qb7 d5
22. Bb3 Nc6
23. Bxd5 Nd4
24. Rd1 Ne2+
25. Kf1 Rab8
26. Qxa7 Rxb2
27. Ne6 Qxe6
28. Bxe6 Rxd1+
29. Kf2
1. e4 e5
2. Nf3 Nc6
3. d4 exd4
4. Bc4 Bc5
5. Ng5 Ne5
6. Bxf7+ Nxf7
7. Nxf7 Bb4+
8. c3 dxc3
9. bxc3 Bxc3+
10. Nxc3 Kxf7
11. Qd5+ Kf8
12. Ba3+ d6
13. e5 Qg5
14. exd6 Qxd5