ydb/library/cpp/yt/memory/exact_ref_counted_cast.h, branch mainMirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=main2026-06-24T09:39:10ZAdd ExactRefCountedCast and TRef::Contains2026-06-24T09:39:10Zbabenkobabenko@yandex-team.com2026-06-24T08:20:18Zurn:sha1:7493b7938546308fc8ead81e411e05c73b1ce9e4
Some handy helpers.
`ExactRefCountedCast<T>(p)`: exact-type downcast for `New<T>()`-allocated objects. `New<T>(`) builds a final `TRefCountedWrapper<T>`, so this casts to the wrapper and upcasts back to `T*`; being final, the `dynamic_cast` lowers to a single `type_info` compare (~2ns vs ~20ns for the is-a path).
`TRef::Contains(other)`: true iff other's range lies within this range.
commit_hash:138e8719b8ecbd953437b81380e54f736db029ef