/extlibs/Boost/include/boost/mpl/is_sequence.hpp
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1 2#ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED 3#define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED 4 5// Copyright Aleksey Gurtovoy 2002-2004 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: is_sequence.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ 15// $Revision: 49267 $ 16 17#include <boost/mpl/not.hpp> 18#include <boost/mpl/and.hpp> 19#include <boost/mpl/begin_end.hpp> 20#include <boost/mpl/if.hpp> 21#include <boost/mpl/bool.hpp> 22#include <boost/mpl/sequence_tag_fwd.hpp> 23#include <boost/mpl/identity.hpp> 24#include <boost/mpl/void.hpp> 25#include <boost/mpl/aux_/has_tag.hpp> 26#include <boost/mpl/aux_/has_begin.hpp> 27#include <boost/mpl/aux_/na_spec.hpp> 28#include <boost/mpl/aux_/lambda_support.hpp> 29#include <boost/mpl/aux_/config/eti.hpp> 30#include <boost/mpl/aux_/config/msvc.hpp> 31#include <boost/mpl/aux_/config/workaround.hpp> 32#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) 33# include <boost/mpl/aux_/msvc_is_class.hpp> 34#elif BOOST_WORKAROUND(BOOST_MSVC, == 1300) 35# include <boost/type_traits/is_class.hpp> 36#endif 37 38#include <boost/type_traits/is_same.hpp> 39 40namespace boost { namespace mpl { 41 42#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) 43 44namespace aux { 45 46// agurt, 11/jun/03: 47// MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a 48// 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >' 49// would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds 50// the issue for most real-world cases 51template< typename T > struct is_sequence_impl 52 : and_< 53 identity< aux::has_tag<T> > 54 , identity< aux::has_begin<T> > 55 > 56{ 57}; 58 59} // namespace aux 60 61template< 62 typename BOOST_MPL_AUX_NA_PARAM(T) 63 > 64struct is_sequence 65 : if_< 66#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) 67 aux::msvc_is_class<T> 68#else 69 boost::is_class<T> 70#endif 71 , aux::is_sequence_impl<T> 72 , bool_<false> 73 >::type 74{ 75 BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T)) 76}; 77 78#elif defined(BOOST_MPL_CFG_NO_HAS_XXX) 79 80template< 81 typename BOOST_MPL_AUX_NA_PARAM(T) 82 > 83struct is_sequence 84 : bool_<false> 85{ 86}; 87 88#else 89 90template< 91 typename BOOST_MPL_AUX_NA_PARAM(T) 92 > 93struct is_sequence 94 : not_< is_same< typename begin<T>::type, void_ > > 95{ 96 BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T)) 97}; 98 99#endif // BOOST_MSVC 100 101#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG) 102template<> struct is_sequence<int> 103 : bool_<false> 104{ 105}; 106#endif 107 108BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence) 109 110}} 111 112#endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED