Mirror reflection library 0.5.13
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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> MIRROR_NAMESPACE_BEGIN template <typename MetaNamespace> void count_integral_types_in(void) { using namespace mirror; // print to the output std::cout << // the count of elements in a range such that it ... mp::size< // ...contains only meta-types reflecting integral types mp::only_if< // from a range of all members of the namespace // such that they satisfy the MetaType concept mp::only_if< members<MetaNamespace>, mp::is_a< mp::arg<1>, meta_type_tag > >, std::is_integral< original_type< mp::arg<1> > > > >::value << " integral types in namespace '" << MetaNamespace::full_name() << "'" << std::endl; } MIRROR_NAMESPACE_END int main(void) { using namespace mirror; count_integral_types_in< MIRRORED_GLOBAL_SCOPE() >(); count_integral_types_in< MIRRORED_NAMESPACE(std) >(); // return 0; } /* Example of output: 10 integral types in namespace '' 0 integral types in namespace 'std' */