diff options
Diffstat (limited to 'absl/container/btree_set.h')
| -rw-r--r-- | absl/container/btree_set.h | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/absl/container/btree_set.h b/absl/container/btree_set.h index 695b09f5..51dc42b7 100644 --- a/absl/container/btree_set.h +++ b/absl/container/btree_set.h @@ -43,8 +43,11 @@ // pointers, and references to elements. Such invalidations are typically only // an issue if insertion and deletion operations are interleaved with the use of // more than one iterator, pointer, or reference simultaneously. For this -// reason, `insert()` and `erase()` return a valid iterator at the current -// position. +// reason, `insert()`, `erase()`, and `extract_and_get_next()` return a valid +// iterator at the current position. +// +// Another API difference is that btree iterators can be subtracted, and this +// is faster than using std::distance. #ifndef ABSL_CONTAINER_BTREE_SET_H_ #define ABSL_CONTAINER_BTREE_SET_H_ @@ -269,7 +272,8 @@ class btree_set // btree_set::extract() // // Extracts the indicated element, erasing it in the process, and returns it - // as a C++17-compatible node handle. Overloads are listed below. + // as a C++17-compatible node handle. Any references, pointers, or iterators + // are invalidated. Overloads are listed below. // // node_type extract(const_iterator position): // @@ -289,6 +293,21 @@ class btree_set // It does NOT refer to the data layout of the underlying btree. using Base::extract; + // btree_set::extract_and_get_next() + // + // Extracts the indicated element, erasing it in the process, and returns it + // as a C++17-compatible node handle along with an iterator to the next + // element. + // + // extract_and_get_next_return_type extract_and_get_next( + // const_iterator position): + // + // Extracts the element at the indicated position, returns a struct + // containing a member named `node`: a node handle owning that extracted + // data and a member named `next`: an iterator pointing to the next element + // in the btree. + using Base::extract_and_get_next; + // btree_set::merge() // // Extracts elements from a given `source` btree_set into this @@ -611,6 +630,21 @@ class btree_multiset // It does NOT refer to the data layout of the underlying btree. using Base::extract; + // btree_multiset::extract_and_get_next() + // + // Extracts the indicated element, erasing it in the process, and returns it + // as a C++17-compatible node handle along with an iterator to the next + // element. + // + // extract_and_get_next_return_type extract_and_get_next( + // const_iterator position): + // + // Extracts the element at the indicated position, returns a struct + // containing a member named `node`: a node handle owning that extracted + // data and a member named `next`: an iterator pointing to the next element + // in the btree. + using Base::extract_and_get_next; + // btree_multiset::merge() // // Extracts all elements from a given `source` btree_multiset into this @@ -760,12 +794,6 @@ struct set_slot_policy { static void destroy(Alloc *alloc, slot_type *slot) { absl::allocator_traits<Alloc>::destroy(*alloc, slot); } - - template <typename Alloc> - static void transfer(Alloc *alloc, slot_type *new_slot, slot_type *old_slot) { - construct(alloc, new_slot, old_slot); - destroy(alloc, old_slot); - } }; // A parameters structure for holding the type parameters for a btree_set. |