lagoon/example/members_01.cpp

This example shows the usage of the reflection functions and meta-scope / meta-namespace member traversal.

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 <iostream>

LAGOON_NAMESPACE_BEGIN

template <class Range>
void print_info(Range r)
{
    // print the number of elements in the range
    std::cout << r.size() << std::endl;
    // traverse the elements of the range
    while(!r.empty())
    {
        // and for each print its 'kind' (type, class, template, ...)
        // and full name with the nested name specifier
        std::cout << r.front()->self()->construct_name()
            << ": "
            << r.front()->full_name()
            << std::endl;
        r.step_front();
    }
}

LAGOON_NAMESPACE_END

int main(void)
{
    using namespace lagoon;
    //
    // reflect the global scope
    auto meta_gs(reflected_global_scope());
    // and print the list of its members
    std::cout << "the global scope:" << std::endl;
    print_info(meta_gs->members());
    //
    // get the meta-namespace reflecting the std namespace
    auto meta_std(meta_gs->namespace_("std"));
    // and print the list of its members
    std::cout << "namespace "
        << meta_std->base_name()
        << ": "
        << std::endl;
    print_info(meta_std->members());
    //
    // get the meta-namespace for the boost namespace
    auto meta_boost(meta_gs->namespace_("boost"));
    std::cout << "namespace "
        << meta_boost->base_name()
        << ": "
        << std::endl;
    // and print the list of its members
    print_info(meta_boost->members());
    //
    return 0;
}

/* Example of output:
the global scope:
16
namespace: std
namespace: boost
type: void
type: bool
type: char
type: unsigned char
type: wchar_t
type: short int
type: int
type: long int
type: unsigned short int
type: unsigned int
type: unsigned long int
type: float
type: double
type: long double
namespace std:
17
class: std::string
class: std::wstring
class: std::tm
template: std::pair
template: std::tuple
template: std::allocator
template: std::equal_to
template: std::not_equal_to
template: std::less
template: std::greater
template: std::less_equal
template: std::greater_equal
template: std::vector
template: std::list
template: std::deque
template: std::map
template: std::set
*/