command_parse_test.cpp

/* ------------------------------------------------------------------------- */
//  家電を操作するための文章コマンドのパーサ
/* ------------------------------------------------------------------------- */
#include <iostream>
#include <string>

#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/spirit/include/phoenix_stl.hpp>

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

// 結果を格納する型（2次元 string テーブル）
typedef std::vector<std::vector<std::string>> str_2d_array;

/* ------------------------------------------------------------------------- */
//  Parser
//    string: "(a|b|c)d(e|f)g" -->  str_2d_array: { {a,b,c}, d, {e,f}, g}
/* ------------------------------------------------------------------------- */
template <typename Iterator>
bool command_parse(Iterator first, Iterator last, str_2d_array& result)
{
	using qi::char_;
	using qi::_1;
	using qi::lit;

	qi::rule<Iterator, std::string(), ascii::space_type> word, words, sentence;
	std::vector<std::string> buf;

	word     = +( char_ - '(' - '|' - ')' );
	words    = -lit('(')
	            >> ( word [phx::push_back(phx::ref(buf), _1)] % '|' )
	            >> -lit(')');
	sentence = *(
	              words
	                [phx::push_back(phx::ref(result), phx::ref(buf))]
	                [phx::clear(phx::ref(buf))]
	            )
	            >> qi::eol;

	bool r = qi::phrase_parse(first, last, sentence, ascii::space);

	if (!r || first != last) {
		return false;
	}

	return true;
}

/* ------------------------------------------------------------------------- */
//  main 関数（テスト用）
/* ------------------------------------------------------------------------- */
int main(int argc, char const* argv[])
{
	std::string str = "(abc|def|ghi)jkl(mno|pqr)stu(vwx|yz|)";
	std::string::const_iterator iter = str.begin(), end = str.end();

	str_2d_array sentences;
	if (command_parse(iter, end, sentences)) {
		std::cout << "failed" << std::endl;
	}

	for (const auto& sentence : sentences) {
		std::cout << sentence.size() << ": ";
		for (const auto& x : sentence) {
			std::cout << x << " ";
		}
		std::cout << std::endl;
	}

	return 0;
}

3: abc def ghi
1: jkl
2: mno pqr
1: stu
2: vwx yz