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authorGravatar Derek Mauro <dmauro@google.com>2022-11-28 09:36:14 -0800
committerGravatar Copybara-Service <copybara-worker@google.com>2022-11-28 09:37:03 -0800
commit04596b253fb511069538cab453166c05a1567705 (patch)
tree368297e5737dcb170150c7e7f3f66720fb83d061
parent091842beeac564776c231e7d1787b527d1c2d0d9 (diff)
Add a TODO for the deprecation of absl::aligned_storage_t
PiperOrigin-RevId: 491367420 Change-Id: I6a0ab74bb0675fd910ed9fc95ee20c5023eb0cb6
-rw-r--r--absl/meta/type_traits.h27
1 files changed, 15 insertions, 12 deletions
diff --git a/absl/meta/type_traits.h b/absl/meta/type_traits.h
index 6e6001fe..dd9de42f 100644
--- a/absl/meta/type_traits.h
+++ b/absl/meta/type_traits.h
@@ -114,18 +114,6 @@ struct VoidTImpl {
using type = void;
};
-// This trick to retrieve a default alignment is necessary for our
-// implementation of aligned_storage_t to be consistent with any implementation
-// of std::aligned_storage.
-template <size_t Len, typename T = std::aligned_storage<Len>>
-struct default_alignment_of_aligned_storage;
-
-template <size_t Len, size_t Align>
-struct default_alignment_of_aligned_storage<Len,
- std::aligned_storage<Len, Align>> {
- static constexpr size_t value = Align;
-};
-
////////////////////////////////
// Library Fundamentals V2 TS //
////////////////////////////////
@@ -642,6 +630,21 @@ using remove_extent_t = typename std::remove_extent<T>::type;
template <typename T>
using remove_all_extents_t = typename std::remove_all_extents<T>::type;
+namespace type_traits_internal {
+// This trick to retrieve a default alignment is necessary for our
+// implementation of aligned_storage_t to be consistent with any
+// implementation of std::aligned_storage.
+template <size_t Len, typename T = std::aligned_storage<Len>>
+struct default_alignment_of_aligned_storage;
+
+template <size_t Len, size_t Align>
+struct default_alignment_of_aligned_storage<
+ Len, std::aligned_storage<Len, Align>> {
+ static constexpr size_t value = Align;
+};
+} // namespace type_traits_internal
+
+// TODO(b/260219225): std::aligned_storage(_t) is deprecated in C++23.
template <size_t Len, size_t Align = type_traits_internal::
default_alignment_of_aligned_storage<Len>::value>
using aligned_storage_t = typename std::aligned_storage<Len, Align>::type;