lagoon/example/for_each_07.cpp

This example shows the usage of the namespace reflection functions and range for-each utility with lambda functions and the transform only_if and sort adapters

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/extract.hpp>
#include <lagoon/range/sort.hpp>
#include <lagoon/range/for_each.hpp>
#include <iostream>

int main(void)
{
    using namespace lagoon;
    typedef shared<meta_named_scoped_object> shared_mnso;
    typedef shared<meta_type> shared_mt;
    //
    // get the members of the global scope and extract only
    // those having the meta_type interface, sort the resulting
    // range by the binary functor (the first lambda function,
    // comparing the sizes of the types) and then for each
    // if them use the second lambda functor to print their full names
    for_each(
        sort(
            extract<meta_type>(
                reflected_global_scope()->members()
            ),
            [](const shared_mt& a, const shared_mt& b)
            {
                return a->size_of() < b->size_of();
            }
        ),
        [](const shared_mt& member)
        {
            std::cout << member->full_name() << std::endl;
        }
    );
    return 0;
}

/* Example of output:
void
bool
char
unsigned char
short int
unsigned short int
wchar_t
int
long int
unsigned int
unsigned long int
float
double
long double
*/