Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Flat Set (adoc)

Exit Zen

6 :17

	English - `value_type` must be move-constructible. - Pointer stability is not kept under rehashing. - `begin()` is not constant-time. - There is no API for bucket handling (except `bucket_count`) or node extraction/insertion. - The maximum load factor of the container is managed internally and can't be set by the user. 312/10000 · 312
7 :23

	English Other than this, `boost::unordered_flat_set` is mostly a drop-in replacement of node-based standard unordered associative containers. 133/10000 · 133
8 :26

	English Synopsis 8/10000 · 8
:235 :235

	English --- 3/10000 · 3
10 :237

	English Description 11/10000 · 11
11 :239

	English Template Parameters 21/10000 · 21
12 :242

	English _Key_ 5/10000 · 5
13 :242

	English `Key` must be https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^] into the container 108/10000 · 108
14 :246

	English and https://en.cppreference.com/w/cpp/named_req/Erasable[Erasable^] from the container. 87/10000 · 87
15 :248

	English _Hash_ 6/10000 · 6
16 :248

	English A unary function object type that acts a hash function for a `Key`. It takes a single argument of type `Key` and returns a value of type `std::size_t`. 151/10000 · 151
17 :248

	English _Pred_ 6/10000 · 6
18 :248

	English A binary function object that induces an equivalence relation on values of type `Key`. It takes two arguments of type `Key` and returns a value of type `bool`. 159/10000 · 159
19 :248

	English _Allocator_ 11/10000 · 11
20 :248

	English An allocator whose value type is the same as the container's value type. 72/10000 · 72
21 :256

	English Allocators using https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers] are supported. 116/10000 · 116
22 :260

	English The elements of the container are held into an internal _bucket array_. An element is inserted into a bucket determined by its hash code, but if the bucket is already occupied (a _collision_), an available one in the vicinity of the original position is used. 259/10000 · 259
23 :264

	English The size of the bucket array can be automatically increased by a call to `insert`/`emplace`, or as a result of calling `rehash`/`reserve`. The _load factor_ of the container (number of elements divided by number of buckets) is never greater than `max_load_factor()`, except possibly for small sizes where the implementation may decide to allow for higher loads. 361/10000 · 361
24 :269

	English If `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<Hash>::value` is `true`, the hash function is used as-is; otherwise, a bit-mixing post-processing stage is added to increase the quality of hashing at the expense of extra computational cost. 298/10000 · 298
:273 :273

	English --- 3/10000 · 3

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