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Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
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allow for visitation of an element right after insertion (by contrast, `insert_or_visit(x, f)` only visits the element if insertion did _not_ take place).
支持在插入元素后立即对其进行访问（而 `insert_or_visit(x, f)` 仅在未执行插入时才访问元素）。
Made visitation exclusive-locked within certain
在特定 `boost::concurrent_flat_set` 操作中启用独占锁访问机制，
`boost::concurrent_flat_set` operations to allow for safe mutable modification of elements ({github-pr-url}/265[PR#265^]).
以支持对元素进行安全的可变修改(https://github.com/boostorg/unordered/pull/265[PR#265])。
In Visual Studio Natvis, supported any container with an allocator that uses fancy pointers. This applies to any fancy pointer type, as long as the proper Natvis customization point "Intrinsic" functions are written for the fancy pointer type.
在 Visual Studio Natvis 中，现支持使用带花式指针分配器的任意容器。只要为花式指针类型编写了相应的 Natvis 自定义“Intrinsic”函数，即可适用于所有花式指针类型。
Added GDB pretty-printers for all containers and iterators. For a container with an allocator that uses fancy pointers, these only work if the proper pretty-printer is written for the fancy pointer type itself.
为所有容器和迭代器添加 GDB 美化打印器。对于使用花式指针分配器的容器，需先为花式指针类型编写对应的美化打印器方可正常使用。
Fixed `std::initializer_list` assignment issues for open-addressing containers
修复开放寻址容器中 `std::initializer_list` 的 赋值问题
({github-pr-url}/277[PR#277^]).
(https://github.com/boostorg/unordered/pull/277[PR#277])。
Allowed non-copyable callables to be passed to the `std::initializer_list` overloads of `insert_{and|or}_[c]visit` for concurrent containers, by internally passing a `std::reference_wrapper` of the callable to the iterator-pair overloads.
通过内部将可调用对象的 `std::reference_wrapper` 传递给迭代器对重载，现允许向并发容器的 `insert_{and|or}_[c]visit` 的 `std::initializer_list` 重载传递不可复制的可调用对象。
Release 1.86.0
版本 1.86.0
Added container `pmr` aliases when header `<memory_resource>` is available. The alias `boost::unordered::pmr::[container]` refers to `boost::unordered::[container]` with a `std::pmr::polymorphic_allocator` allocator type.
当头文件 `<memory_resource>` 可用时，新增容器 `pmr` 别名。 `boost::unordered::pmr::[container]` 别名指向使用 `std::pmr::polymorphic_allocator` 分配器类型的 `boost::unordered::[container]` 。</memory_resource>
Equipped open-addressing and concurrent containers to internally calculate and provide statistical metrics affected by the quality of the hash function. This functionality is enabled by the global macro `BOOST_UNORDERED_ENABLE_STATS`.
为开放寻址容器与并发容器增设内部统计功能，可计算并提供受哈希函数质量影响的统计指标。通过全局宏 `BOOST_UNORDERED_ENABLE_STATS` 启用。
Avalanching hash functions must now be marked via an `is_avalanching` typedef with an embedded `value` constant set to `true` (typically, defining `is_avalanching` as `std::true_type`). `using is_avalanching = void` is deprecated but allowed for backwards compatibility.
雪崩哈希函数现在必须通过内嵌 `value` 常量设为 `true` 的 `is_avalanching` typedef 来标记（通常将 `is_avalanching` 定义为 `std::true_type`）。 `using is_avalanching = void` 已被弃用，但为了向后兼容性仍予保留。
Added Visual Studio Natvis framework custom visualizations for containers and iterators. This works for all containers with an allocator using raw pointers. In this release, containers and iterators are not supported if their allocator uses fancy pointers. This may be addressed in later releases.
为容器和迭代器添加 Visual Studio Natvis 框架的自定义可视化功能。此功能适用于所有使用原始指针分配器的容器。在此版本中，若容器或迭代器的分配器使用花式指针，则暂不支持该功能，此问题可能在后续版本中解决。
Release 1.85.0
版本 1.85.0
Optimized `emplace()` for a `value_type` or `init_type` (if applicable) argument to bypass creating an intermediate object. The argument is already the same type as the would-be intermediate object.
优化 `emplace()` 对 `value_type` 或 `init_type` （如适用）参数的实现，使其无需创建中间对象即可直接处理参数，因为该参数类型与待构造的中间对象类型完全相同。
Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
优化 map 容器的 `emplace()` 对 `k,v` 参数的处理：将对象构造延迟到确认需要插入元素时执行。此优化在映射的 `key_type` 可移动构造或 `k` 参数为 `key_type` 类型时生效。
Fixed support for allocators with `explicit` copy constructors ({github-pr-url}/234[PR#234^]).
修复对含 `explicit` 复制构造函数的分配器的支持(https://github.com/boostorg/unordered/pull/234[PR#234])。
Fixed bug in the `const` version of `unordered_multimap::find(k, hash, eq)` ({github-pr-url}/238[PR#238^]).
修复 `unordered_multimap::find(k, hash, eq)` 的 `const` 版本中的缺陷(https://github.com/boostorg/unordered/pull/238[PR#238])。
Release 1.84.0 - Major update
版本 1.84.0 - 重大更新
Added `boost::concurrent_flat_set`.
新增 `boost::concurrent_flat_set` 。
Added `[c]visit_while` operations to concurrent containers,
为并发容器新增 `[c]visit_while` 操作，
with serial and parallel variants.
提供串行与并行两种执行模式。
Added efficient move construction of `boost::unordered_flat_(map|set)` from
实现高效双向移动构造（从
`boost::concurrent_flat_(map|set)` and vice versa.
`boost::unordered_flat_(map|set)` 到 `boost::concurrent_flat_(map|set)` 及反向的）
Added bulk visitation to concurrent containers for increased lookup performance.
为并发容器新增批量访问功能以提升查找性能。
Added debug-mode mechanisms for detecting illegal reentrancies into
新增调试模式机制，用于检测用户代码对
a concurrent container from user code.
并发容器的非法重入操作。
Added Boost.Serialization support to all containers and their (non-local) iterator types.
为所有容器及其（非本地）迭代器类型添加 Boost.Serialization 支持。
Added support for fancy pointers to open-addressing and concurrent containers.
为开放寻址容器与并发容器新增对花式指针的支持，此特性支持诸如使用 Boost.Interprocess 分配器在共享内存中构建容器等应用场景。
This enables scenarios like the use of Boost.Interprocess allocators to construct containers in shared memory.
这使得像使用 Boost.Interprocess 分配器在共享内存中构造容器这样的场景成为可能。
Fixed bug in member of pointer operator for local iterators of closed-addressing
修复闭寻址容器局部迭代器的成员指针运算符缺陷
English Chinese (Simplified Han script) Actions
Unofficial release uploaded to vault, to be used with Boost 1.35.0. Incorporated many of the suggestions from the review.
非官方版本已上传至资源库，适用于 Boost 1.35.0。该版本已采纳评审阶段的多项改进建议。
Improved portability thanks to Boost regression testing.
通过 Boost 回归测试，代码可移植性得到显著提升。
Fix lots of typos, and clearer text in the documentation.
修正文档中的多处笔误，并优化文本表述以提升可读性。
Fix floating point to `std::size_t` conversion when calculating sizes from
修复根据最大负载因子计算容器大小时，浮点数到 `std::size_t` 的转换问题，
= Change Log
= 变更日志
Release 1.89.0
版本 1.89.0
Migrated the documentation to a multipage format using Antora.
使用 Antora 将文档重构为多页面格式。
Release 1.87.0 - Major update
版本 1.87.0 - 重大更新
Added concurrent, node-based containers `boost::concurrent_node_map` and `boost::concurrent_node_set`.
新增基于节点的并发容器 `boost::concurrent_node_map` 与 `boost::concurrent_node_set` 。
Added `insert_and_visit(x, f1, f2)` and similar operations to concurrent containers, which
为并发容器新增 `insert_and_visit(x, f1, f2)` 及类似操作，这些操作
Added GDB pretty-printers for all containers and iterators. For a container with an allocator that uses fancy pointers, these only work if the proper pretty-printer is written for the fancy pointer type itself.
为所有容器和迭代器添加 GDB 美化打印器。对于使用花式指针分配器的容器，需先为花式指针类型编写对应的美化打印器方可正常使用。
Fixed `std::initializer_list` assignment issues for open-addressing containers
修复开放寻址容器中 `std::initializer_list` 的 赋值问题
({github-pr-url}/277[PR#277^]).
(https://github.com/boostorg/unordered/pull/277[PR#277])。
Added container `pmr` aliases when header `<memory_resource>` is available. The alias `boost::unordered::pmr::[container]` refers to `boost::unordered::[container]` with a `std::pmr::polymorphic_allocator` allocator type.
当头文件 `<memory_resource>` 可用时，新增容器 `pmr` 别名。 `boost::unordered::pmr::[container]` 别名指向使用 `std::pmr::polymorphic_allocator` 分配器类型的 `boost::unordered::[container]` 。</memory_resource>
Optimized `emplace()` for a `value_type` or `init_type` (if applicable) argument to bypass creating an intermediate object. The argument is already the same type as the would-be intermediate object.
优化 `emplace()` 对 `value_type` 或 `init_type` （如适用）参数的实现，使其无需创建中间对象即可直接处理参数，因为该参数类型与待构造的中间对象类型完全相同。
Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
优化 map 容器的 `emplace()` 对 `k,v` 参数的处理：将对象构造延迟到确认需要插入元素时执行。此优化在映射的 `key_type` 可移动构造或 `k` 参数为 `key_type` 类型时生效。
Fixed support for allocators with `explicit` copy constructors ({github-pr-url}/234[PR#234^]).
修复对含 `explicit` 复制构造函数的分配器的支持(https://github.com/boostorg/unordered/pull/234[PR#234])。
Fixed bug in the `const` version of `unordered_multimap::find(k, hash, eq)` ({github-pr-url}/238[PR#238^]).
修复 `unordered_multimap::find(k, hash, eq)` 的 `const` 版本中的缺陷(https://github.com/boostorg/unordered/pull/238[PR#238])。
Release 1.84.0 - Major update
版本 1.84.0 - 重大更新
Added `boost::concurrent_flat_set`.
新增 `boost::concurrent_flat_set` 。
Added debug-mode mechanisms for detecting illegal reentrancies into
新增调试模式机制，用于检测用户代码对
a concurrent container from user code.
并发容器的非法重入操作。
Added Boost.Serialization support to all containers and their (non-local) iterator types.
为所有容器及其（非本地）迭代器类型添加 Boost.Serialization 支持。
only work with C++11 onwards.
仅支持 C{plus}{plus}11 及以上版本。
Release 1.83.0 - Major update
版本 1.83.0 - 重大更新
Added `boost::concurrent_flat_map`, a fast, thread-safe hashmap based on open addressing.
新增基于开放寻址的快速线程安全哈希映射容器 `boost::concurrent_flat_map` 。
Sped up iteration of open-addressing containers.
提升开放寻址容器的迭代性能。
In open-addressing containers, `erase(iterator)`, which previously returned nothing, now
在开放寻址容器中，原无返回值的 `erase(iterator)` 方法，现在
Release 1.82.0 - Major update
版本 1.82.0 - 重大更新
Added node-based, open-addressing containers
新增基于节点的开放寻址容器

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Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
Optimized优化 map 容器的 `emplace()` for对 `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a参数的处理：将对象构造延迟到确认需要插入元素时执行。此优化在映射的 `key_type` 可移动构造或 `k` 参数为 `key_type`. 类型时生效。
06/05/2026
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Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
Optimized `emplace()` for `k,v` arguments on map containers to delay constructing the object until it is certain that an element should be inserted. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.
06/05/2026
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safe-html, strict-same
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:48
String age
06/05/2026
Last updated
06/06/2026
Source string age
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doc/modules/ROOT/pages/changes_zh_Hans.adoc, string 28