#ifndef BOOST_MPL_O1_SIZE_HPP_INCLUDED #define BOOST_MPL_O1_SIZE_HPP_INCLUDED // Copyright Aleksey Gurtovoy 2000-2004 // // 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) // // See http://www.boost.org/libs/mpl for documentation. // $Id$ // $Date$ // $Revision$ #include <boost/mpl/O1_size_fwd.hpp> #include <boost/mpl/sequence_tag.hpp> #include <boost/mpl/aux_/O1_size_impl.hpp> #include <boost/mpl/aux_/na_spec.hpp> #include <boost/mpl/aux_/lambda_support.hpp> namespace boost { namespace mpl { // returns sequence size if it's an O(1) operation; otherwise returns -1 template< typename BOOST_MPL_AUX_NA_PARAM(Sequence) > struct O1_size : O1_size_impl< typename sequence_tag<Sequence>::type > ::template apply< Sequence > { BOOST_MPL_AUX_LAMBDA_SUPPORT(1, O1_size, (Sequence)) }; BOOST_MPL_AUX_NA_SPEC(1, O1_size) }} #endif // BOOST_MPL_O1_SIZE_HPP_INCLUDED