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no_duplicate_tags.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\multi_index\detail\no_duplicate_tags.hpp
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/* Copyright 2003-2005 Joaqu�n M L�pez Mu�oz. * 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/multi_index for library home page. */ #ifndef BOOST_MULTI_INDEX_DETAIL_NO_DUPLICATE_TAGS_HPP #define BOOST_MULTI_INDEX_DETAIL_NO_DUPLICATE_TAGS_HPP #if defined(_MSC_VER)&&(_MSC_VER>=1200) #pragma once #endif #include
/* keep it first to prevent nasty warns in MSVC */ #include
#include
namespace boost{ namespace multi_index{ namespace detail{ /* no_duplicate_tags check at compile-time that a tag list * has no duplicate tags. * The algorithm deserves some explanation: tags * are sequentially inserted into a mpl::set if they were * not already present. Due to the magic of mpl::set * (mpl::has_key is contant time), this operation takes linear * time, and even MSVC++ 6.5 handles it gracefully (other obvious * solutions are quadratic.) */ struct duplicate_tag_mark{}; struct duplicate_tag_marker { template
struct apply { typedef mpl::s_item< typename mpl::if_
,duplicate_tag_mark,Tag>::type, MplSet > type; }; }; template
struct no_duplicate_tags { typedef typename mpl::fold< TagList, mpl::set0<>, duplicate_tag_marker >::type aux; BOOST_STATIC_CONSTANT( bool,value=!(mpl::has_key
::value)); }; /* Variant for an index list: duplication is checked * across all the indices. */ struct duplicate_tag_list_marker { template
struct apply:mpl::fold< BOOST_DEDUCED_TYPENAME Index::tag_list, MplSet, duplicate_tag_marker> { }; }; template
struct no_duplicate_tags_in_index_list { typedef typename mpl::fold< IndexList, mpl::set0<>, duplicate_tag_list_marker >::type aux; BOOST_STATIC_CONSTANT( bool,value=!(mpl::has_key
::value)); }; } /* namespace multi_index::detail */ } /* namespace multi_index */ } /* namespace boost */ #endif
no_duplicate_tags.hpp
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