diff options
author | Abseil Team <absl-team@google.com> | 2020-09-18 15:55:15 -0700 |
---|---|---|
committer | Derek Mauro <dmauro@google.com> | 2020-09-24 13:47:15 -0400 |
commit | b56cbdd23834a65682c0b46f367f8679e83bc894 (patch) | |
tree | dacab9a64dd1a9e9668737e511d1a5420ff96001 /absl/container/internal/compressed_tuple.h | |
parent | b832dce8489ef7b6231384909fd9b68d5a5ff2b7 (diff) |
Abseil LTS 2020092320200923
What's New:
* `absl::StatusOr<T>` has been released. See our [blog
post](https://abseil.io/blog/2020-091021-status) for more
information.
* Abseil Flags reflection interfaces have been released.
* Abseil Flags memory usage has been significantly optimized.
* Abseil now supports a "hardened" build mode. This build mode enables
runtime checks that guard against programming errors that may lead
to security vulnerabilities.
Notable Fixes:
* Sanitizer dynamic annotations like `AnnotateRWLockCreate` that are
also defined by the compiler sanitizer implementation are no longer
also defined by Abseil.
* Sanitizer macros are now prefixed with `ABSL_` to avoid naming collisions.
* Sanitizer usage is now automatically detected and no longer requires
macros like `ADDRESS_SANITIZER` to be defined on the command line.
Breaking Changes:
* Abseil no longer contains a `dynamic_annotations` library. Users
using a supported build system (Bazel or CMake) are unaffected by
this, but users manually specifying link libraries may get an error
about a missing linker input.
Baseline: 7680a5f8efe32de4753baadbd63e74e59d95bac1
Cherry picks: None
Diffstat (limited to 'absl/container/internal/compressed_tuple.h')
-rw-r--r-- | absl/container/internal/compressed_tuple.h | 41 |
1 files changed, 33 insertions, 8 deletions
diff --git a/absl/container/internal/compressed_tuple.h b/absl/container/internal/compressed_tuple.h index 4bfe92fd..02bfd03f 100644 --- a/absl/container/internal/compressed_tuple.h +++ b/absl/container/internal/compressed_tuple.h @@ -169,9 +169,33 @@ constexpr bool ShouldAnyUseBase() { } template <typename T, typename V> -using TupleMoveConstructible = typename std::conditional< - std::is_reference<T>::value, std::is_convertible<V, T>, - std::is_constructible<T, V&&>>::type; +using TupleElementMoveConstructible = + typename std::conditional<std::is_reference<T>::value, + std::is_convertible<V, T>, + std::is_constructible<T, V&&>>::type; + +template <bool SizeMatches, class T, class... Vs> +struct TupleMoveConstructible : std::false_type {}; + +template <class... Ts, class... Vs> +struct TupleMoveConstructible<true, CompressedTuple<Ts...>, Vs...> + : std::integral_constant< + bool, absl::conjunction< + TupleElementMoveConstructible<Ts, Vs&&>...>::value> {}; + +template <typename T> +struct compressed_tuple_size; + +template <typename... Es> +struct compressed_tuple_size<CompressedTuple<Es...>> + : public std::integral_constant<std::size_t, sizeof...(Es)> {}; + +template <class T, class... Vs> +struct TupleItemsMoveConstructible + : std::integral_constant< + bool, TupleMoveConstructible<compressed_tuple_size<T>::value == + sizeof...(Vs), + T, Vs...>::value> {}; } // namespace internal_compressed_tuple @@ -217,17 +241,18 @@ class ABSL_INTERNAL_COMPRESSED_TUPLE_DECLSPEC CompressedTuple explicit constexpr CompressedTuple(const Ts&... base) : CompressedTuple::CompressedTupleImpl(absl::in_place, base...) {} - template <typename... Vs, + template <typename First, typename... Vs, absl::enable_if_t< absl::conjunction< // Ensure we are not hiding default copy/move constructors. absl::negation<std::is_same<void(CompressedTuple), - void(absl::decay_t<Vs>...)>>, - internal_compressed_tuple::TupleMoveConstructible< - Ts, Vs&&>...>::value, + void(absl::decay_t<First>)>>, + internal_compressed_tuple::TupleItemsMoveConstructible< + CompressedTuple<Ts...>, First, Vs...>>::value, bool> = true> - explicit constexpr CompressedTuple(Vs&&... base) + explicit constexpr CompressedTuple(First&& first, Vs&&... base) : CompressedTuple::CompressedTupleImpl(absl::in_place, + absl::forward<First>(first), absl::forward<Vs>(base)...) {} template <int I> |