Merge pull request #5333 from lioncash/define
common/parent_of_member: Replace TYPED_STORAGE define with template alias
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commit
99d2d77062
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@ -533,7 +533,7 @@ private:
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}
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}
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private:
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private:
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static constexpr TYPED_STORAGE(Derived) DerivedStorage = {};
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static constexpr TypedStorage<Derived> DerivedStorage = {};
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static_assert(GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage));
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static_assert(GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage));
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};
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};
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@ -549,7 +549,7 @@ public:
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using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
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using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
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static constexpr bool IsValid() {
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static constexpr bool IsValid() {
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TYPED_STORAGE(Derived) DerivedStorage = {};
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TypedStorage<Derived> DerivedStorage = {};
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return GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage);
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return GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage);
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}
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}
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@ -10,21 +10,23 @@
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#include "common/common_types.h"
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#include "common/common_types.h"
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namespace Common {
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namespace Common {
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namespace detail {
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template <typename T, size_t Size, size_t Align>
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template <typename T, size_t Size, size_t Align>
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struct TypedStorage {
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struct TypedStorageImpl {
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std::aligned_storage_t<Size, Align> storage_;
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std::aligned_storage_t<Size, Align> storage_;
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};
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};
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} // namespace detail
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#define TYPED_STORAGE(...) TypedStorage<__VA_ARGS__, sizeof(__VA_ARGS__), alignof(__VA_ARGS__)>
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template <typename T>
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template <typename T>
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static constexpr T* GetPointer(TYPED_STORAGE(T) & ts) {
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using TypedStorage = detail::TypedStorageImpl<T, sizeof(T), alignof(T)>;
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template <typename T>
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static constexpr T* GetPointer(TypedStorage<T>& ts) {
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return static_cast<T*>(static_cast<void*>(std::addressof(ts.storage_)));
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return static_cast<T*>(static_cast<void*>(std::addressof(ts.storage_)));
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}
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}
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template <typename T>
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template <typename T>
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static constexpr const T* GetPointer(const TYPED_STORAGE(T) & ts) {
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static constexpr const T* GetPointer(const TypedStorage<T>& ts) {
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return static_cast<const T*>(static_cast<const void*>(std::addressof(ts.storage_)));
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return static_cast<const T*>(static_cast<const void*>(std::addressof(ts.storage_)));
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}
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}
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@ -72,7 +74,7 @@ struct OffsetOfCalculator {
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union Union {
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union Union {
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char c{};
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char c{};
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UnionHolder first_union;
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UnionHolder first_union;
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TYPED_STORAGE(ParentType) parent;
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TypedStorage<ParentType> parent;
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constexpr Union() : c() {}
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constexpr Union() : c() {}
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};
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};
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