diff options
Diffstat (limited to 'absl/container/flat_hash_set.h')
| -rw-r--r-- | absl/container/flat_hash_set.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/absl/container/flat_hash_set.h b/absl/container/flat_hash_set.h index 6b89da65..4938c703 100644 --- a/absl/container/flat_hash_set.h +++ b/absl/container/flat_hash_set.h @@ -67,11 +67,15 @@ struct FlatHashSetPolicy; // // By default, `flat_hash_set` uses the `absl::Hash` hashing framework. All // fundamental and Abseil types that support the `absl::Hash` framework have a -// compatible equality operator for comparing insertions into `flat_hash_map`. +// compatible equality operator for comparing insertions into `flat_hash_set`. // If your type is not yet supported by the `absl::Hash` framework, see // absl/hash/hash.h for information on extending Abseil hashing to user-defined // types. // +// Using `absl::flat_hash_set` at interface boundaries in dynamically loaded +// libraries (e.g. .dll, .so) is unsupported due to way `absl::Hash` values may +// be randomized across dynamically loaded libraries. +// // NOTE: A `flat_hash_set` stores its keys directly inside its implementation // array to avoid memory indirection. Because a `flat_hash_set` is designed to // move data when rehashed, set keys will not retain pointer stability. If you @@ -106,7 +110,7 @@ class flat_hash_set public: // Constructors and Assignment Operators // - // A flat_hash_set supports the same overload set as `std::unordered_map` + // A flat_hash_set supports the same overload set as `std::unordered_set` // for construction and assignment: // // * Default constructor @@ -173,7 +177,7 @@ class flat_hash_set // available within the `flat_hash_set`. // // NOTE: this member function is particular to `absl::flat_hash_set` and is - // not provided in the `std::unordered_map` API. + // not provided in the `std::unordered_set` API. using Base::capacity; // flat_hash_set::empty() @@ -332,7 +336,7 @@ class flat_hash_set // flat_hash_set::swap(flat_hash_set& other) // // Exchanges the contents of this `flat_hash_set` with those of the `other` - // flat hash map, avoiding invocation of any move, copy, or swap operations on + // flat hash set, avoiding invocation of any move, copy, or swap operations on // individual elements. // // All iterators and references on the `flat_hash_set` remain valid, excepting @@ -340,7 +344,7 @@ class flat_hash_set // // `swap()` requires that the flat hash set's hashing and key equivalence // functions be Swappable, and are exchaged using unqualified calls to - // non-member `swap()`. If the map's allocator has + // non-member `swap()`. If the set's allocator has // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value` // set to `true`, the allocators are also exchanged using an unqualified call // to non-member `swap()`; otherwise, the allocators are not swapped. @@ -395,14 +399,14 @@ class flat_hash_set // flat_hash_set::bucket_count() // // Returns the number of "buckets" within the `flat_hash_set`. Note that - // because a flat hash map contains all elements within its internal storage, + // because a flat hash set contains all elements within its internal storage, // this value simply equals the current capacity of the `flat_hash_set`. using Base::bucket_count; // flat_hash_set::load_factor() // // Returns the current load factor of the `flat_hash_set` (the average number - // of slots occupied with a value within the hash map). + // of slots occupied with a value within the hash set). using Base::load_factor; // flat_hash_set::max_load_factor() @@ -443,9 +447,11 @@ class flat_hash_set // erase_if(flat_hash_set<>, Pred) // // Erases all elements that satisfy the predicate `pred` from the container `c`. +// Returns the number of erased elements. template <typename T, typename H, typename E, typename A, typename Predicate> -void erase_if(flat_hash_set<T, H, E, A>& c, Predicate pred) { - container_internal::EraseIf(pred, &c); +typename flat_hash_set<T, H, E, A>::size_type erase_if( + flat_hash_set<T, H, E, A>& c, Predicate pred) { + return container_internal::EraseIf(pred, &c); } namespace container_internal { |