488 lines
11 KiB
C++
488 lines
11 KiB
C++
// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef INDIRECT_TRAITS_DWA2002131_HPP
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# define INDIRECT_TRAITS_DWA2002131_HPP
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# include <boost/type_traits/is_function.hpp>
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# include <boost/type_traits/is_reference.hpp>
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# include <boost/type_traits/is_pointer.hpp>
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# include <boost/type_traits/is_class.hpp>
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# include <boost/type_traits/is_const.hpp>
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# include <boost/type_traits/is_volatile.hpp>
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# include <boost/type_traits/is_member_function_pointer.hpp>
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# include <boost/type_traits/is_member_pointer.hpp>
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# include <boost/type_traits/remove_cv.hpp>
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# include <boost/type_traits/remove_reference.hpp>
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# include <boost/type_traits/remove_pointer.hpp>
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# include <boost/type_traits/detail/ice_and.hpp>
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# include <boost/detail/workaround.hpp>
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# include <boost/mpl/eval_if.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/and.hpp>
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# include <boost/mpl/not.hpp>
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# include <boost/mpl/aux_/lambda_support.hpp>
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# ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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# include <boost/detail/is_function_ref_tester.hpp>
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# endif
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namespace boost { namespace detail {
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namespace indirect_traits {
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# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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template <class T>
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struct is_reference_to_const : mpl::false_
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{
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};
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template <class T>
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struct is_reference_to_const<T const&> : mpl::true_
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{
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};
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# if defined(BOOST_MSVC) && _MSC_FULL_VER <= 13102140 // vc7.01 alpha workaround
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template<class T>
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struct is_reference_to_const<T const volatile&> : mpl::true_
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{
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};
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# endif
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template <class T>
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struct is_reference_to_function : mpl::false_
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{
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};
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template <class T>
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struct is_reference_to_function<T&> : is_function<T>
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{
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};
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template <class T>
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struct is_pointer_to_function : mpl::false_
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{
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};
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// There's no such thing as a pointer-to-cv-function, so we don't need
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// specializations for those
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template <class T>
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struct is_pointer_to_function<T*> : is_function<T>
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{
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};
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template <class T>
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struct is_reference_to_member_function_pointer_impl : mpl::false_
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{
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};
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template <class T>
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struct is_reference_to_member_function_pointer_impl<T&>
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: is_member_function_pointer<typename remove_cv<T>::type>
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{
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};
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template <class T>
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struct is_reference_to_member_function_pointer
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: is_reference_to_member_function_pointer_impl<T>
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_member_function_pointer,(T))
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};
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template <class T>
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struct is_reference_to_function_pointer_aux
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: mpl::and_<
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is_reference<T>
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, is_pointer_to_function<
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typename remove_cv<
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typename remove_reference<T>::type
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>::type
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>
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>
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{
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// There's no such thing as a pointer-to-cv-function, so we don't need specializations for those
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};
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template <class T>
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struct is_reference_to_function_pointer
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: mpl::if_<
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is_reference_to_function<T>
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, mpl::false_
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, is_reference_to_function_pointer_aux<T>
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>::type
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{
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};
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template <class T>
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struct is_reference_to_non_const
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: mpl::and_<
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is_reference<T>
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, mpl::not_<
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is_reference_to_const<T>
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>
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>
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{
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};
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template <class T>
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struct is_reference_to_volatile : mpl::false_
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{
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};
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template <class T>
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struct is_reference_to_volatile<T volatile&> : mpl::true_
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{
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};
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# if defined(BOOST_MSVC) && _MSC_FULL_VER <= 13102140 // vc7.01 alpha workaround
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template <class T>
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struct is_reference_to_volatile<T const volatile&> : mpl::true_
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{
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};
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# endif
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template <class T>
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struct is_reference_to_pointer : mpl::false_
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{
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};
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template <class T>
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struct is_reference_to_pointer<T*&> : mpl::true_
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{
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};
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template <class T>
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struct is_reference_to_pointer<T* const&> : mpl::true_
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{
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};
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template <class T>
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struct is_reference_to_pointer<T* volatile&> : mpl::true_
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{
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};
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template <class T>
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struct is_reference_to_pointer<T* const volatile&> : mpl::true_
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{
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};
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template <class T>
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struct is_reference_to_class
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: mpl::and_<
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is_reference<T>
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, is_class<
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typename remove_cv<
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typename remove_reference<T>::type
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>::type
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>
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>
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_class,(T))
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};
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template <class T>
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struct is_pointer_to_class
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: mpl::and_<
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is_pointer<T>
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, is_class<
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typename remove_cv<
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typename remove_pointer<T>::type
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>::type
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>
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>
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_pointer_to_class,(T))
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};
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# else
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using namespace boost::detail::is_function_ref_tester_;
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typedef char (&inner_yes_type)[3];
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typedef char (&inner_no_type)[2];
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typedef char (&outer_no_type)[1];
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template <typename V>
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struct is_const_help
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{
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typedef typename mpl::if_<
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is_const<V>
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, inner_yes_type
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, inner_no_type
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>::type type;
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};
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template <typename V>
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struct is_volatile_help
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{
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typedef typename mpl::if_<
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is_volatile<V>
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, inner_yes_type
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, inner_no_type
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>::type type;
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};
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template <typename V>
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struct is_pointer_help
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{
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typedef typename mpl::if_<
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is_pointer<V>
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, inner_yes_type
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, inner_no_type
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>::type type;
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};
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template <typename V>
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struct is_class_help
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{
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typedef typename mpl::if_<
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is_class<V>
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, inner_yes_type
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, inner_no_type
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>::type type;
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};
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template <class T>
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struct is_reference_to_function_aux
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value = sizeof(detail::is_function_ref_tester(t,0)) == sizeof(::boost::type_traits::yes_type));
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typedef mpl::bool_<value> type;
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};
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template <class T>
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struct is_reference_to_function
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: mpl::if_<is_reference<T>, is_reference_to_function_aux<T>, mpl::bool_<false> >::type
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{
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};
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template <class T>
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struct is_pointer_to_function_aux
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= sizeof(::boost::type_traits::is_function_ptr_tester(t)) == sizeof(::boost::type_traits::yes_type));
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typedef mpl::bool_<value> type;
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};
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template <class T>
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struct is_pointer_to_function
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: mpl::if_<is_pointer<T>, is_pointer_to_function_aux<T>, mpl::bool_<false> >::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_pointer_to_function,(T))
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};
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struct false_helper1
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{
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template <class T>
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struct apply : mpl::false_
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{
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};
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};
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template <typename V>
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typename is_const_help<V>::type reference_to_const_helper(V&);
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outer_no_type
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reference_to_const_helper(...);
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struct true_helper1
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{
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template <class T>
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struct apply
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= sizeof(reference_to_const_helper(t)) == sizeof(inner_yes_type));
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typedef mpl::bool_<value> type;
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};
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};
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template <bool ref = true>
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struct is_reference_to_const_helper1 : true_helper1
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{
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};
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template <>
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struct is_reference_to_const_helper1<false> : false_helper1
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{
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};
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template <class T>
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struct is_reference_to_const
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: is_reference_to_const_helper1<is_reference<T>::value>::template apply<T>
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{
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};
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template <bool ref = true>
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struct is_reference_to_non_const_helper1
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{
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template <class T>
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struct apply
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= sizeof(reference_to_const_helper(t)) == sizeof(inner_no_type));
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typedef mpl::bool_<value> type;
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};
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};
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template <>
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struct is_reference_to_non_const_helper1<false> : false_helper1
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{
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};
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template <class T>
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struct is_reference_to_non_const
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: is_reference_to_non_const_helper1<is_reference<T>::value>::template apply<T>
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_non_const,(T))
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};
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template <typename V>
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typename is_volatile_help<V>::type reference_to_volatile_helper(V&);
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outer_no_type
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reference_to_volatile_helper(...);
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template <bool ref = true>
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struct is_reference_to_volatile_helper1
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{
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template <class T>
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struct apply
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= sizeof(reference_to_volatile_helper(t)) == sizeof(inner_yes_type));
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typedef mpl::bool_<value> type;
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};
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};
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template <>
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struct is_reference_to_volatile_helper1<false> : false_helper1
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{
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};
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template <class T>
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struct is_reference_to_volatile
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: is_reference_to_volatile_helper1<is_reference<T>::value>::template apply<T>
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{
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};
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template <typename V>
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typename is_pointer_help<V>::type reference_to_pointer_helper(V&);
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outer_no_type reference_to_pointer_helper(...);
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template <class T>
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struct reference_to_pointer_impl
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= (sizeof((reference_to_pointer_helper)(t)) == sizeof(inner_yes_type))
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);
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typedef mpl::bool_<value> type;
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};
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template <class T>
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struct is_reference_to_pointer
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: mpl::eval_if<is_reference<T>, reference_to_pointer_impl<T>, mpl::false_>::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_pointer,(T))
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};
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template <class T>
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struct is_reference_to_function_pointer
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: mpl::eval_if<is_reference<T>, is_pointer_to_function_aux<T>, mpl::false_>::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_function_pointer,(T))
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};
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template <class T>
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struct is_member_function_pointer_help
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: mpl::if_<is_member_function_pointer<T>, inner_yes_type, inner_no_type>
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{};
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template <typename V>
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typename is_member_function_pointer_help<V>::type member_function_pointer_helper(V&);
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outer_no_type member_function_pointer_helper(...);
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template <class T>
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struct is_pointer_to_member_function_aux
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= sizeof((member_function_pointer_helper)(t)) == sizeof(inner_yes_type));
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typedef mpl::bool_<value> type;
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};
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template <class T>
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struct is_reference_to_member_function_pointer
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: mpl::if_<
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is_reference<T>
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, is_pointer_to_member_function_aux<T>
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, mpl::bool_<false>
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>::type
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_member_function_pointer,(T))
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};
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template <typename V>
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typename is_class_help<V>::type reference_to_class_helper(V const volatile&);
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outer_no_type reference_to_class_helper(...);
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template <class T>
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struct is_reference_to_class
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= (is_reference<T>::value
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& (sizeof(reference_to_class_helper(t)) == sizeof(inner_yes_type)))
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);
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typedef mpl::bool_<value> type;
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_reference_to_class,(T))
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};
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template <typename V>
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typename is_class_help<V>::type pointer_to_class_helper(V const volatile*);
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outer_no_type pointer_to_class_helper(...);
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template <class T>
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struct is_pointer_to_class
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{
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static T t;
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BOOST_STATIC_CONSTANT(
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bool, value
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= (is_pointer<T>::value
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&& sizeof(pointer_to_class_helper(t)) == sizeof(inner_yes_type))
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);
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typedef mpl::bool_<value> type;
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};
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# endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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}
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using namespace indirect_traits;
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}} // namespace boost::python::detail
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#endif // INDIRECT_TRAITS_DWA2002131_HPP
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