Precise and Flat Reflection (ex Magic Get, ex PODs Flat Reflection)

This C++14 library is meant for accessing structure elements by index and providing other std::tuple like methods for user defined types.

Latest documentation

Pre Boost version

Test results

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Motivating example

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

struct my_struct { // no ostream operator defined!
    int i;
    char c;
    double d;
};

int main() {
    using namespace boost::pfr::ops; // out-of-the-box ostream operator for all PODs!

    my_struct s{100, 'H', 3.141593};
    std::cout << "my_struct has " << boost::pfr::tuple_size<my_struct>::value
        << " fields: " << s << "\n";
}

Outputs:

my_struct has 3 fields: {100, H, 3.14159}

Requirements and Limitations

• C++14 compatible compiler (GCC-5.0+, Clang, ...)
• Static variables are ignored

C++14 limitations (C++17 fixes those):

• T must be constexpr aggregate initializable and must not contain references nor bitfields

License

Distributed under the Boost Software License, Version 1.0.