C++：使用 Boost::PFR 遍历 struct 字段的反射

#include <boost/pfr.hpp>
#include <iostream>
#include <string>

struct Person {
    int id;
    std::string name;
    double score;
};

int main() {
    Person p{42, "Alice", 98.7};

    // 像 tuple 一样遍历字段
    boost::pfr::for_each_field(p, [](const auto& field, std::size_t i) {
        std::cout << "Field #" << i << " = " << field << '\n';
    });

    return 0;
}

Field #0 = 42
Field #1 = Alice
Field #2 = 98.7