Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Click here to view the latest version of this page.


// boost lockfree
// Copyright (C) 2011 Tim Blechmann
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at


#include <boost/lockfree/policies.hpp>

namespace boost {
namespace lockfree {
namespace detail {

namespace mpl = boost::mpl;

template <typename bound_args, typename tag_type>
struct has_arg
    typedef typename parameter::binding<bound_args, tag_type, mpl::void_>::type type;
    static const bool value = mpl::is_not_void_<type>::type::value;

template <typename bound_args>
struct extract_capacity
    static const bool has_capacity = has_arg<bound_args, tag::capacity>::value;

    typedef typename mpl::if_c<has_capacity,
                               typename has_arg<bound_args, tag::capacity>::type,
                               mpl::size_t< 0 >
                              >::type capacity_t;

    static const std::size_t capacity = capacity_t::value;

template <typename bound_args, typename T>
struct extract_allocator
    static const bool has_allocator = has_arg<bound_args, tag::allocator>::value;

    typedef typename mpl::if_c<has_allocator,
                               typename has_arg<bound_args, tag::allocator>::type,
                              >::type allocator_arg;

    typedef typename allocator_arg::template rebind<T>::other type;

template <typename bound_args, bool default_ = false>
struct extract_fixed_sized
    static const bool has_fixed_sized = has_arg<bound_args, tag::fixed_sized>::value;

    typedef typename mpl::if_c<has_fixed_sized,
                               typename has_arg<bound_args, tag::fixed_sized>::type,
                              >::type type;

    static const bool value = type::value;

} /* namespace detail */
} /* namespace lockfree */
} /* namespace boost */