1 2 #ifndef BOOST_MPL_O1_SIZE_HPP_INCLUDED 3 #define BOOST_MPL_O1_SIZE_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2000-2004 6 // 7 // Distributed under the Boost Software License, Version 1.0. 8 // (See accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 // 11 // See http://www.boost.org/libs/mpl for documentation. 12 13 // $Id: O1_size.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ 15 // $Revision: 49267 $ 16 17 #include <boost/mpl/O1_size_fwd.hpp> 18 #include <boost/mpl/sequence_tag.hpp> 19 #include <boost/mpl/aux_/O1_size_impl.hpp> 20 #include <boost/mpl/aux_/na_spec.hpp> 21 #include <boost/mpl/aux_/lambda_support.hpp> 22 23 namespace boost { namespace mpl { 24 25 // returns sequence size if it's an O(1) operation; otherwise returns -1 26 template< 27 typename BOOST_MPL_AUX_NA_PARAM(Sequence) 28 > 29 struct O1_size 30 : O1_size_impl< typename sequence_tag<Sequence>::type > 31 ::template apply< Sequence > 32 { 33 BOOST_MPL_AUX_LAMBDA_SUPPORT(1, O1_size, (Sequence)) 34 }; 35 36 BOOST_MPL_AUX_NA_SPEC(1, O1_size) 37 38 }} 39 40 #endif // BOOST_MPL_O1_SIZE_HPP_INCLUDED 41