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Fix std::allocator traits #1518

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gevtushenko merged 1 commit into from
Sep 23, 2021
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Fix std::allocator traits #1518

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21 changes: 21 additions & 0 deletions thrust/detail/allocator/allocator_traits.h
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,8 @@
#include <thrust/detail/type_traits/has_member_function.h>
#include <thrust/detail/type_traits.h>

#include <memory>

THRUST_NAMESPACE_BEGIN
namespace detail
{
Expand Down Expand Up @@ -70,6 +72,25 @@ template<typename Alloc, typename U>
typedef thrust::detail::integral_constant<bool, value> type;
};

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// The following fields of std::allocator have been deprecated (since C++17).
// There's no way to detect it other than explicit specialization.
#if THRUST_CPP_DIALECT >= 2017
#define THRUST_SPECIALIZE_DEPRECATED(trait_name) \
template <typename T> \
struct trait_name<std::allocator<T>> : false_type {};

THRUST_SPECIALIZE_DEPRECATED(has_is_always_equal)
THRUST_SPECIALIZE_DEPRECATED(has_pointer)
THRUST_SPECIALIZE_DEPRECATED(has_const_pointer)
THRUST_SPECIALIZE_DEPRECATED(has_reference)
THRUST_SPECIALIZE_DEPRECATED(has_const_reference)

#undef THRUST_SPECIALIZE_DEPRECATED

template<typename T, typename U>
struct has_rebind<std::allocator<T>, U> : false_type {};
#endif

template<typename T>
struct nested_pointer
{
Expand Down