author | Mike Kinghan <mikek@symbian.org> |
Tue, 13 Jul 2010 15:21:54 +0100 | |
changeset 24 | 936784880b21 |
parent 2 | 39c28ec933dd |
permissions | -rwxr-xr-x |
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// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
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// Use, modification and distribution are subject to the Boost Software License, |
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// Version 1.0. (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/type_traits for most recent version including documentation. |
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#ifndef BOOST_TT_IS_POD_HPP_INCLUDED |
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#define BOOST_TT_IS_POD_HPP_INCLUDED |
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#include <boost/type_traits/config.hpp> |
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#include <boost/type_traits/is_void.hpp> |
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#include <boost/type_traits/is_scalar.hpp> |
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#include <boost/type_traits/detail/ice_or.hpp> |
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#include <boost/type_traits/intrinsics.hpp> |
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#include <cstddef> |
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// should be the last #include |
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#include <boost/type_traits/detail/bool_trait_def.hpp> |
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namespace boost { |
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// forward declaration, needed by 'is_pod_array_helper' template below |
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template< typename T > struct is_POD; |
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namespace detail { |
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#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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template <typename T> struct is_pod_impl |
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{ |
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BOOST_STATIC_CONSTANT( |
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bool, value = |
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(::boost::type_traits::ice_or< |
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::boost::is_scalar<T>::value, |
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::boost::is_void<T>::value, |
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BOOST_IS_POD(T) |
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>::value)); |
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}; |
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#if !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS) |
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template <typename T, std::size_t sz> |
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struct is_pod_impl<T[sz]> |
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: is_pod_impl<T> |
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{ |
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}; |
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#endif |
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#else |
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template <bool is_array = false> |
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struct is_pod_helper |
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{ |
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template <typename T> struct result_ |
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{ |
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BOOST_STATIC_CONSTANT( |
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bool, value = |
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(::boost::type_traits::ice_or< |
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::boost::is_scalar<T>::value, |
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::boost::is_void<T>::value, |
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BOOST_IS_POD(T) |
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>::value)); |
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}; |
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}; |
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template <bool b> |
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struct bool_to_yes_no_type |
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{ |
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typedef ::boost::type_traits::no_type type; |
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}; |
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template <> |
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struct bool_to_yes_no_type<true> |
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{ |
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typedef ::boost::type_traits::yes_type type; |
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}; |
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template <typename ArrayType> |
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struct is_pod_array_helper |
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{ |
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enum { is_pod = ::boost::is_POD<ArrayType>::value }; // MSVC workaround |
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typedef typename bool_to_yes_no_type<is_pod>::type type; |
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type instance() const; |
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}; |
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template <typename T> |
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is_pod_array_helper<T> is_POD_array(T*); |
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template <> |
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struct is_pod_helper<true> |
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{ |
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template <typename T> struct result_ |
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{ |
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static T& help(); |
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BOOST_STATIC_CONSTANT(bool, value = |
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sizeof(is_POD_array(help()).instance()) == sizeof(::boost::type_traits::yes_type) |
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); |
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}; |
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}; |
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template <typename T> struct is_pod_impl |
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{ |
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BOOST_STATIC_CONSTANT( |
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bool, value = ( |
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::boost::detail::is_pod_helper< |
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::boost::is_array<T>::value |
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>::template result_<T>::value |
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) |
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); |
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}; |
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#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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// the following help compilers without partial specialization support: |
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BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,void,true) |
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#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
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BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,void const,true) |
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BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,void volatile,true) |
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BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pod,void const volatile,true) |
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#endif |
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} // namespace detail |
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BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value) |
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BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pod,T,::boost::detail::is_pod_impl<T>::value) |
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} // namespace boost |
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#include <boost/type_traits/detail/bool_trait_undef.hpp> |
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#endif // BOOST_TT_IS_POD_HPP_INCLUDED |