당신이 사용할 수 있도록 내가, 당신이 (분명히 성령 제나라의 대상 도메인입니다) 관용적 C++ 코드를 작성한다고 가정하겠습니다 std::string
:
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#include <boost/fusion/adapted.hpp>
#include <boost/fusion/include/io.hpp>
#include <boost/spirit/include/qi.hpp>
#include <iostream>
namespace qi = boost::spirit::qi;
struct Letter {
double one;
std::string two;
double three;
std::string four;
};
BOOST_FUSION_ADAPT_STRUCT(Letter, one, two, three, four)
template <typename Iterator> struct LETTERParser : qi::grammar<Iterator, Letter()> {
LETTERParser() : LETTERParser::base_type(start) {
using namespace qi;
_11c = repeat(11) [char_];
start = skip(space) [ "LETTER" >> double_ >> _11c >> double_ >> _11c ];
}
private:
qi::rule<Iterator, Letter()> start;
qi::rule<Iterator, std::string()> _11c;
};
int main() {
const std::string input("LETTER 42 12345678901 +Inf abcdefghijk ");
using It = std::string::const_iterator;
LETTERParser<It> parser;
Letter example;
It f = input.begin(), l = input.end();
if (phrase_parse(f, l, parser, qi::ascii::space, example)) {
std::cout << "parsed: " << boost::fusion::as_vector(example) << "\n";
std::cout << " example.one: " << example.one << "\n";
std::cout << " example.two: '" << example.two << "'\n";
std::cout << " example.three: " << example.three << "\n";
std::cout << " example.four: '" << example.four << "'\n";
} else {
std::cout << "couldn't parse '" << input << "'\n";
}
if (f != l)
std::cout << "Remaining unparsed input: '" << std::string(f,l) << "'\n";
}
인쇄물
parsed: (42 12345678901 inf abcdefghijk)
example.one: 42
example.two: '12345678901'
example.three: inf
example.four: 'abcdefghijk'
가장 확실한 사용 사례는 고정 크기 문자 배열? 명백한 유스 케이스를 따라 간다면'std :: string'을 사용하십시오. – sehe