| #ifndef ADT |
| #define ADT |
| |
| #ifdef WITH_NAMESPACE |
| namespace llvm { |
| #endif |
| template <unsigned Alignment, unsigned Size> |
| struct AlignedCharArray { |
| alignas(Alignment) char buffer[Size]; |
| }; |
| |
| template <typename T1> |
| class AlignerImpl { |
| T1 t1; |
| }; |
| |
| template <typename T1> |
| union SizerImpl { |
| char arr1[sizeof(T1)]; |
| }; |
| |
| template <typename T1> |
| struct AlignedCharArrayUnion |
| : AlignedCharArray<alignof(AlignerImpl<T1>), sizeof(SizerImpl<T1>)> {}; |
| |
| template <typename T, unsigned N> |
| struct SmallVectorStorage { |
| AlignedCharArrayUnion<T> InlineElts[N]; |
| }; |
| template <typename T, unsigned N> |
| class SmallVector : SmallVectorStorage<T, N> {}; |
| |
| template <typename T> |
| struct OptionalStorage { |
| AlignedCharArrayUnion<T> storage; |
| }; |
| template <typename T> |
| class Optional { |
| OptionalStorage<T> Storage; |
| }; |
| |
| #ifdef WITH_NAMESPACE |
| } // namespace llvm |
| #endif |
| #endif |