lagoon/example/std_range_02.cpp

This example shows the usage of the namespace reflection functions and std range adaptor together with algorithms from the standard library.

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 <lagoon/lagoon.hpp>
#include <lagoon/range/std_range.hpp>

#include <iostream>
#include <algorithm>

int main(void)
{
    using namespace lagoon;
    // an adapted std range of meta objects
    auto mosr = make_std_range(reflected_global_scope()->members());
    typedef shared<meta_named_scoped_object> shared_mnso;
    // print the count of namespaces in the global scope
    // using the standard count_if algorithm
    std::cout << std::count_if(
        mosr.begin(),
        mosr.end(),
        [](const shared_mnso& meta_obj)
        {
            return meta_obj->is_namespace();
        }
    ) << std::endl;
    return 0;
}

/* Example of output:
2
*/