mirror/example/meta_prog_15.cpp

This example shows the usage of the meta-programming utilities and the intrinsic meta-functions for various meta-objects

Copyright 2008-2011 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"

MIRROR_NAMESPACE_BEGIN

template <typename Specifier>
struct count_all
 : public mp::size<
    mp::only_if<
        mp::only_if<
            mp::flatten<
                MIRRORED_GLOBAL_SCOPE(),
                members
            >,
            mp::is_a<
                mp::arg<1>,
                required_param_of<
                    elaborated_type
                >
            >
        >,
        std::is_same<
            elaborated_type<
                mp::arg<1>
            >,
            Specifier
        >
    >
> { };

MIRROR_NAMESPACE_END

int main(void)
{
    using namespace mirror;
    std::cout << count_all<spec_struct_tag>::value <<
        " structs registered." << std::endl;
    std::cout << count_all<spec_class_tag>::value <<
        " class(es) registered." << std::endl;
    //
    return 0;
}

/* Example of output:
10 structs registered.
1 class(es) registered.
*/