2 #ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
3 #define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
5 // Copyright Aleksey Gurtovoy 2002-2004
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)
11 // See http://www.boost.org/libs/mpl for documentation.
13 // $Source: /cvsroot/boost/boost/boost/mpl/is_sequence.hpp,v $
14 // $Date: 2005/08/25 16:27:21 $
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>
38 #include <boost/type_traits/is_same.hpp>
40 namespace boost { namespace mpl {
42 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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
51 template< typename T > struct is_sequence_impl
53 identity< aux::has_tag<T> >
54 , identity< aux::has_begin<T> >
62 typename BOOST_MPL_AUX_NA_PARAM(T)
66 #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
71 , aux::is_sequence_impl<T>
75 BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
78 #elif defined(BOOST_MPL_CFG_NO_HAS_XXX)
81 typename BOOST_MPL_AUX_NA_PARAM(T)
91 typename BOOST_MPL_AUX_NA_PARAM(T)
94 : not_< is_same< typename begin<T>::type, void_ > >
96 BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
101 #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
102 template<> struct is_sequence<int>
108 BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence)
112 #endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED