В C ++ конечным парсером является Boost.Qi
#include <boost/spirit/include/qi.hpp>
#include <string>
namespace qi = boost::spirit::qi;
int main()
{
int level, relative;
float x, y, angle, length, minAngle, maxAngle;
std::string name, parentName;
std::string input = "20 1.3 3.7 1.234 100.0 0.0 3.14 2 \"Foo\" \"Bar\"";
std::string::iterator begin = input.begin();
std::string::iterator end = input.end();
using qi::int_;
using qi::float_;
using qi::char_;
using qi::lit;
using qi::ascii::space;
qi::phrase_parse(begin, end,
int_ >> float_ >> float_ >> float_ >> float_ >> float_ >> float_ >> int_
>> lit("\"") >> *(~char_('"')) >> lit("\"")
>> lit("\"") >> *(~char_('"')) >> lit("\""),
space,
level, x, y, angle, length, minAngle, maxAngle, relative, name, parentName);
}