我怎么能简单地消耗乱码？ [英] How can I simply consume unrecognized characters?
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问题描述
我设法解析PGN文件感谢升压灵库，但只要有一些字符我没有预期失败。
I managed to parse a pgn file thanks to the Boost Spirit library, but it fails as soon as there is some characters I did not "anticipated".
下面是我的精神的语法：
Here is my Spirit grammar :
#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;
};
}
我怎么能简单地消耗任何角色，我不能预期？我的意思是，我怎么能忽略我不希望在没有我的语法规则的任何字符？
How could I simply consume any character I could not "anticipate" ? I mean, how could I ignore any character that I don't want in none of my grammar rule ?
对于测试目的：
在这里我的解析器头（pgn_games_extractor.hpp）
here my parser header (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
下面是我的解析器源（pgn_games_extractor.cpp）：
Here is my parser source (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，因为我无法分析以下PGN： ScotchGambitPgn.zip 。我认为这是因为这个文件的编码问题。
I am asking this question because I could not parse the following pgn : ScotchGambitPgn.zip. I think it is because of an encoding issue with this file.
我是用灵2和C ++ 11（GNU）
I am using Spirit 2 and C++ 11 (Gnu)
推荐答案
有关它的价值，这里的显著简化为：
For what it's worth, here's significantly simplified:
<大骨节病> 住在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：
- 请不要在读取内存已满文件（
的boost ::精神:: istream_iterator） - 请不要跳过手动（使用船长）
- 没有明确语义（<一个href=\"https://stackoverflow.com/questions/17072987/boost-spirit-skipper-issues/17073965#17073965\">Boost精神队长问题）
- 请不要使用（％）=如果没有必要
- 请不要不必要的合成属性（使用
原料[]） - 把此举作为可选的可选部分，不存储不对称的魔法标志，如...（寻找
no_move） - 请不要过于具体的（使用
的IStream＆安培;而不是ifstream的＆安培;）
- don't read full file in memory (
boost::spirit::istream_iterator) - don't manually skip (use skippers)
- don't explicitly lexeme (Boost spirit skipper issues)
- don't use %= if not needed
- don't synthesize unneeded attributes (use
raw[]) - treat optional parts of move as optional, don't store assymetric magic flags like "..." (look for
no_move) - don't be overly specific (use
istream&instead ofifstream&)
或许一些其他的东西我忘了。输出例如
Probably some other things I forgot. Output is e.g.
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
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