2. Boost Unordered Translation (zh_Hans)
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14 :58
	English Open-addressing Containers
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 开放寻址容器 6/260 · 26 Needs editing
15 :60
	English The C++ standard does not currently provide any open-addressing container specification to adhere to, so `boost::unordered_flat_set`/`unordered_node_set` and `boost::unordered_flat_map`/`unordered_node_map` take inspiration from `std::unordered_set` and `std::unordered_map`, respectively, and depart from their interface where convenient or as dictated by their internal data structure, which is radically different from that imposed by the standard (closed addressing).
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — C++ 标准目前并未提供任何可供遵循的开放定址容器规范，因此 `boost::unordered_flat_set` / `unordered_node_set` 与 `boost::unordered_flat_map` / `unordered_node_map` 分别借鉴 `std::unordered_set` 和 `std::unordered_map` 的设计，并在其内部数据结构（与标准规定的闭寻址方式截然不同）允许或需要时，对接口进行相应调整。 231/4710 · 471 Needs editing
16 :67
	English Open-addressing containers provided by Boost.Unordered only work with reasonably compliant C++11 (or later) compilers. Language-level features such as move semantics and variadic template parameters are then not emulated. The containers are fully https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[AllocatorAware^] and support https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers^].
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — Boost.Unordered 提供的开放寻址容器仅兼容符合 C{plus}{plus}1（或更高版本）的编译器，且不再对移动语义、变参模板等语言特性进行模拟实现。这些容器完全符合 https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[分配器感知] 规范，并支持 https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[花式指针] 。 249/4300 · 430 Needs editing
17 :74
	English The main differences with C++ unordered associative containers are:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 与 C{plus}{plus} 无序关联容器的主要区别在于： 30/670 · 67 Needs editing
18 :76
	English In general:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 总体特性： 5/110 · 11 Needs editing
19 :77
	English ** `begin()` is not constant-time. ** `erase(iterator)` does not return an iterator to the following element, but a proxy object that converts to that iterator if requested; this avoids a potentially costly iterator increment operation when not needed. ** There is no API for bucket handling (except `bucket_count`). ** The maximum load factor of the container is managed internally and can't be set by the user. The maximum load, exposed through the public function `max_load`, may decrease on erasure under high-load conditions.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — ** `begin()` 不是常数时间复杂度操作。 ** `erase(iterator)` 不返回指向下一元素的迭代器，而是返回一个代理对象，该对象可按需转换为目标迭代器；这可以避免在无需迭代器时可能产生的高昂递增操作开销。 ** 未提供用于桶管理的 API（除 `bucket_count` 外）。 ** 容器的最大负载因子由内部自动管理，用户无法手动设置。通过公开函数 `max_load` 获取的最大负载值，在高负载情况下执行删除操作时可能会降低。 228/5300 · 530 Needs editing
20 :84
	English Flat containers (`boost::unordered_flat_set` and `boost::unordered_flat_map`):
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 扁平容器（ `boost::unordered_flat_set` 与 `boost::unordered_flat_map` ）： 66/780 · 78 Needs editing
21 :85
	English ** `value_type` must be move-constructible. ** Pointer stability is not kept under rehashing. ** There is no API for node extraction/insertion.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — ** `value_type` 必须支持移动构造。 ** 在重哈希的过程中，指针稳定性无法保持。 ** 不提供节点提取/插入的 API 接口。 71/1430 · 143 Needs editing
22 :89
	English Concurrent Containers
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 并发容器 4/210 · 21 Needs editing
23 :91
	English There is currently no specification in the C++ standard for this or any other type of concurrent data structure. The APIs of `boost::concurrent_flat_set`/`boost::concurrent_node_set` and `boost::concurrent_flat_map`/`boost::concurrent_node_map` are modelled after `std::unordered_flat_set` and `std::unordered_flat_map`, respectively, with the crucial difference that iterators are not provided due to their inherent problems in concurrent scenarios (high contention, prone to deadlocking): so, Boost.Unordered concurrent containers are technically not models of https://en.cppreference.com/w/cpp/named_req/Container[Container^], although they meet all the requirements of https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[AllocatorAware^] containers (including https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointer^] support) except those implying iterators.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 目前 C++ 标准中尚未针对此类或任何其他类型的并发数据结构提供规范。`boost::concurrent_flat_set` / `boost::concurrent_node_set` 与 `boost::concurrent_flat_map` / `boost::concurrent_node_map` 的 API 分别参照 `std::unordered_flat_set` 和 `std::unordered_flat_map` 设计，但有一个关键区别：由于迭代器在并发场景中存在的固有问题（高竞争、易死锁），这些容器不提供迭代器。因此，Boost.Unordered 并发容器在技术上并不符合 https://en.cppreference.com/w/cpp/named_req/Container[容器^] 的模型，但它们满足 https://en.cppreference.com/w/cpp/named_req/AllocatorAwareContainer[分配器感知^] 容器（包括 https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[花式指针^] 支持）中除涉及迭代器之外的所有要求。 550/9060 · 906 Needs editing
24 :104
	English In a non-concurrent unordered container, iterators serve two main purposes:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 在非并发无序容器中，迭代器主要有两项核心功能： 23/750 · 75 Needs editing
25 :106
	English Access to an element previously located via lookup.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 访问先前通过查找定位的元素。 14/510 · 51 Needs editing
26 :107
	English Container traversal.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 容器遍历。 5/200 · 20 Needs editing
27 :109
	English In place of iterators, Boost.Unordered concurrent containers use _internal visitation_ facilities as a thread-safe substitute. Classical operations returning an iterator to an element already existing in the container, like for instance:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 为替代迭代器，Boost.Unordered 并发容器使用__内部访问__机制作为线程安全的替代方案。传统操作会返回指向容器中既有元素的迭代器（例如下列）： 78/2370 · 237 Needs editing
28 :119
	English are transformed to accept a _visitation function_ that is passed such element:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 被改造为接受传递该元素的__访问函数__： 21/780 · 78 Needs editing
29 :127
	English (In the second case `f` is only invoked if there's an equivalent element to `obj` in the table, not if insertion is successful). Container traversal is served by:
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — （第二种情况中，仅当表中存在与 `obj` 等价元素时才会调用 `f` ，而非在插入成功时调用）。容器遍历通过以下方式实现： 62/1620 · 162 Needs editing
30 :136
	English of which there are parallelized versions in C++17 compilers with parallel algorithm support. In general, the interface of concurrent containers is derived from that of their non-concurrent counterparts by a fairly straightforward process of replacing iterators with visitation where applicable. If for regular maps `iterator` and `const_iterator` provide mutable and const access to elements, respectively, here visitation is granted mutable or const access depending on the constness of the member function used (there are also `*cvisit` overloads for explicit const visitation); In the case of `boost::concurrent_flat_set`, visitation is always const.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 在支持并行算法的 C{plus}{plus}17 编译器中提供并行化版本。通常，并发容器的接口通过将迭代器替换为访问机制的过程从非并发版本派生。对于常规映射， `iterator` 和 `const_iterator` 分别提供对元素的非常量和常量访问；此处访问权限取决于所用成员函数的常量性（同时提供 `*cvisit` 重载用于显式常量访问）。对于 `boost::concurrent_flat_set` ，访问操作始终为常量。 217/6530 · 653 Needs editing
31 :145
	English One notable operation not provided by `boost::concurrent_flat_map`/`boost::concurrent_node_map` is `operator[]`/`at`, which can be replaced, if in a more convoluted manner, by `xref:reference/concurrent_flat_map.adoc#concurrent_flat_map_try_emplace_or_cvisit[try_emplace_or_visit]`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — `boost::concurrent_flat_map` / `boost::concurrent_node_map` 未提供的一个关键操作是 `operator[]` / `at` ，该功能可通过 xref:reference/concurrent_flat_map.adoc#concurrent_flat_map_try_emplace_or_cvisit[`try_emplace_or_visit`] 实现替代（该方式更为复杂）。 220/2820 · 282 Needs editing
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