mirror/example/all_member_variables.cpp

This example shows the usage of the all_member_variables meta-function

Copyright 2008-2010 Matus Chochlik. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include <mirror/mirror.hpp>
#include <iostream>
#include "./classes.hpp"

// Helper functor used by the for_each_ii algorithm in print_info
struct info_printer
{
    template <class IterInfo>
    void operator()(IterInfo)
    {
        using namespace mirror;
        // if this is the first element in the range traversal
        // print the opening parenthesis
        if(IterInfo::is_first::value)
            std::cout << "(";
        // print the full name of the current element
        std::cout << IterInfo::type::full_name();
        // if this is the last element if the range traversal
        // print the closing parenthesis or a separating comma
        // otherwise
        if(IterInfo::is_last::value)
            std::cout << ")" << std::endl;
        else std::cout << ", ";
    }
};

template <class Class>
void print_info(void)
{
    using namespace mirror;
    typedef MIRRORED_CLASS(Class) meta_X;
    std::cout << "Members of "
        << meta_X::full_name()
        << ": ";
    // use the info_printer functor on each of the member variables
    // of the class reflected by the meta_X meta-class
    mp::for_each_ii< all_member_variables<meta_X> >(info_printer());
}

int main(void)
{
    using namespace mirror;
    //
    print_info<test::C>();
    print_info<test::D>();
    print_info<test::E>();
    print_info<test::F>();
    print_info<test::G>();
    print_info<test::H>();
    //
    return 0;
}

/* Example of output:
Members of test::C: (test::C::c)
Members of test::D: (test::D::d)
Members of test::E: (test::C::c, test::D::d, test::E::e)
Members of test::F: (test::C::c, test::D::d, test::E::e, test::F::f)
Members of test::G: (test::G::g)
Members of test::H: (test::C::c, test::D::d, test::E::e, test::F::f, test::G::g, test::H::h)
*/