diff options
Diffstat (limited to 'absl/container/internal/container_memory.h')
-rw-r--r-- | absl/container/internal/container_memory.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/absl/container/internal/container_memory.h b/absl/container/internal/container_memory.h index 3262d4eb..d86d7b80 100644 --- a/absl/container/internal/container_memory.h +++ b/absl/container/internal/container_memory.h @@ -68,6 +68,18 @@ void* Allocate(Alloc* alloc, size_t n) { return p; } +// Returns true if the destruction of the value with given Allocator will be +// trivial. +template <class Allocator, class ValueType> +constexpr auto IsDestructionTrivial() { + constexpr bool result = + std::is_trivially_destructible<ValueType>::value && + std::is_same<typename absl::allocator_traits< + Allocator>::template rebind_alloc<char>, + std::allocator<char>>::value; + return std::integral_constant<bool, result>(); +} + // The pointer must have been previously obtained by calling // Allocate<Alignment>(alloc, n). template <size_t Alignment, class Alloc> @@ -414,12 +426,13 @@ struct map_slot_policy { } template <class Allocator> - static void destroy(Allocator* alloc, slot_type* slot) { + static auto destroy(Allocator* alloc, slot_type* slot) { if (kMutableKeys::value) { absl::allocator_traits<Allocator>::destroy(*alloc, &slot->mutable_value); } else { absl::allocator_traits<Allocator>::destroy(*alloc, &slot->value); } + return IsDestructionTrivial<Allocator, value_type>(); } template <class Allocator> |