#include <boost/spirit/home/x3.hpp>
#include <iomanip>
#include <iostream>

namespace x3 = boost::spirit::x3;
constexpr static inline std::string_view sample = R"("asdf" "xxx" "yyy")";

template <typename CharType> size_t test() {
    static auto const qstr                      //
        = x3::rule<class _, std::string>{"str"} //
        = x3::lexeme['"' >> *~x3::char_('"') >> '"'];

    using Var = boost::variant<std::string, CharType>;

    std::vector<Var> data;
    phrase_parse(sample.begin(), sample.end(), *qstr, x3::space, data);
    return data.size();
}

#define TEST(CharType) \
    std::cout << std::setw(13) << #CharType << " -> " << test<CharType>() << std::endl;

int main() {
    TEST(uint8_t);
    TEST(int8_t);
    TEST(signed char);
    TEST(unsigned char);

    TEST(char);
}