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112 lines
2.7 KiB
112 lines
2.7 KiB
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#ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED |
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#define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2002-2004 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: is_sequence.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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#include <boost/mpl/not.hpp> |
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#include <boost/mpl/and.hpp> |
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#include <boost/mpl/begin_end.hpp> |
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#include <boost/mpl/if.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/sequence_tag_fwd.hpp> |
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#include <boost/mpl/identity.hpp> |
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#include <boost/mpl/void.hpp> |
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#include <boost/mpl/aux_/has_tag.hpp> |
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#include <boost/mpl/aux_/has_begin.hpp> |
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#include <boost/mpl/aux_/na_spec.hpp> |
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#include <boost/mpl/aux_/lambda_support.hpp> |
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#include <boost/mpl/aux_/config/eti.hpp> |
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#include <boost/mpl/aux_/config/msvc.hpp> |
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#include <boost/mpl/aux_/config/workaround.hpp> |
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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# include <boost/mpl/aux_/msvc_is_class.hpp> |
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#elif BOOST_WORKAROUND(BOOST_MSVC, == 1300) |
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# include <boost/type_traits/is_class.hpp> |
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#endif |
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#include <boost/type_traits/is_same.hpp> |
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namespace boost { namespace mpl { |
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
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namespace aux { |
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// agurt, 11/jun/03: |
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// MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a |
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// 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >' |
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// would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds |
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// the issue for most real-world cases |
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template< typename T > struct is_sequence_impl |
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: and_< |
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identity< aux::has_tag<T> > |
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, identity< aux::has_begin<T> > |
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> |
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{ |
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}; |
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} // namespace aux |
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template< |
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typename BOOST_MPL_AUX_NA_PARAM(T) |
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> |
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struct is_sequence |
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: if_< |
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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aux::msvc_is_class<T> |
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#else |
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boost::is_class<T> |
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#endif |
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, aux::is_sequence_impl<T> |
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, bool_<false> |
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>::type |
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{ |
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T)) |
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}; |
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#elif defined(BOOST_MPL_CFG_NO_HAS_XXX) |
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template< |
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typename BOOST_MPL_AUX_NA_PARAM(T) |
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> |
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struct is_sequence |
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: bool_<false> |
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{ |
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}; |
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#else |
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template< |
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typename BOOST_MPL_AUX_NA_PARAM(T) |
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> |
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struct is_sequence |
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: not_< is_same< typename begin<T>::type, void_ > > |
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{ |
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T)) |
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}; |
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#endif // BOOST_MSVC |
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#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG) |
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template<> struct is_sequence<int> |
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: bool_<false> |
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{ |
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}; |
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#endif |
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BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence) |
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}} |
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#endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
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