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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).
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= Change Log
= 变更日志
:idprefix: changes_ :svn-ticket-url: https://svn.boost.org/trac/boost/ticket :github-pr-url: https://github.com/boostorg/unordered/pull :cpp: C++
:idprefix: changes_ :svn-ticket-url: https://svn.boost.org/trac/boost/ticket :github-pr-url: https://github.com/boostorg/unordered/pull :cpp: C++
Release 1.89.0
版本 1.89.0
Deprecated `boost::unordered::hash_is_avalanching` is now a using-declaration of
已弃用的 boost::unordered::hash_is_avalanching 现在是
`boost::hash_is_avalanching` in `<boost/container_hash/hash_is_avalanching.hpp>`. Use that header directly instead. `<boost/unordered/hash_traits.hpp>` will be removed in the future.
在 <boost container_hash="" hash_is_avalanching.hpp=""> 中对 boost::hash_is_avalanching 的使用声明。请直接使用该头文件代替。<boost unordered="" hash_traits.hpp=""> 将在未来被移除。</boost></boost>
Added `pull(const_iterator)` to open-addressing containers. This operation
为开放寻址容器新增 `pull(const_iterator)` 操作，该操作
allows for efficient removal and retrieval of an element via move construction.
支持通过移动构造机制高效移除并检索指定元素。
Release 1.88.0
版本 1.88.0
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
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。
English Chinese (Simplified Han script) Actions
:idprefix: changes_ :svn-ticket-url: https://svn.boost.org/trac/boost/ticket :github-pr-url: https://github.com/boostorg/unordered/pull :cpp: C++
:idprefix: changes_ :svn-ticket-url: https://svn.boost.org/trac/boost/ticket :github-pr-url: https://github.com/boostorg/unordered/pull :cpp: C++
Better configuration for {cpp}0x features when the headers aren't available.
对 C{plus}{plus}0x 特性提供优化方案，以应对头文件不可用的情况。
Release 1.39.0
版本 1.39.0
{svn-ticket-url}/2756[Ticket 2756^]: Avoid a warning
https://svn.boost.org/trac/boost/ticket/2756[问题单 2756] ：规避
on Visual {cpp} 2009.
Visual C{plus}{plus} 2009 的编译警告。
Some other minor internal changes to the implementation, tests and
对实现、测试及文档进行其他少量内部调整。
documentation.
（文档）
Document that the equality and inequality operators are undefined for two objects if their equality predicates aren't equivalent. Thanks to Daniel Krügler.
补充说明：如果两个对象的相等谓词不等价，则它们的相等与不等运算符的行为未定义。感谢 Daniel Krügler。
link:../../../../type_traits/index.html[aligned storage^] to store the types. This changes the way the allocator is used to construct nodes. It used to construct the node with two calls to the allocator's `construct` method - once for the pointers and once for the value. It now constructs the node with a single call to construct and then constructs the value using in place construction.
link:../../../../type_traits/index.html[对齐存储] 来存储类型。这改变了利用分配器构造节点的方式：原先通过两次调用分配器的 `construct` 方法分别构造指针和值，现在仅通过单次调用构造节点，随后采用就地构造方式构建值对象。
only g++ 4.4 in {cpp}0x mode).
仅 g{plus}{plus} 4.4 的 C{plus}{plus}0x 模式）。
Rename overload of `emplace` with hint, to `emplace_hint` as specified in
将带提示的 `emplace` 重载更名为 `emplace++_++hint` 。
http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2691.pdf[n2691^].
（根据 http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2691.pdf[n2691^] 规范）
Move semantics - full support when rvalue references are available, emulated
移动语义：在支持右值引用的环境中提供完整支持，否则
using a cut down version of the Adobe move library when they are not.
使用精简版 Adobe 移动库进行模拟实现。
`boost::hash_is_avalanching` in `<boost/container_hash/hash_is_avalanching.hpp>`. Use that header directly instead. `<boost/unordered/hash_traits.hpp>` will be removed in the future.
在 <boost container_hash="" hash_is_avalanching.hpp=""> 中对 boost::hash_is_avalanching 的使用声明。请直接使用该头文件代替。<boost unordered="" hash_traits.hpp=""> 将在未来被移除。</boost></boost>
allows for efficient removal and retrieval of an element via move construction.
支持通过移动构造机制高效移除并检索指定元素。
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])。
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。
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。
Extended heterogeneous lookup to more member functions as specified in
将异构查找功能扩展至更多成员函数
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2363r5.html[P2363].
（根据https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2363r5.html[P2363] 规范） 。
Replaced the previous post-mixing process for open-addressing containers with
取代开放寻址容器原有的后混合处理流程（采用
a new algorithm based on extended multiplication by a constant.
基于常量扩展乘法的新算法）。
Fixed bug in internal emplace() impl where stack-local types were not properly
修复内部 emplace() 实现中存在的缺陷：
Refactor internal implementation to be dramatically faster
重构内部实现以显著提升性能
Allow `final` Hasher and KeyEqual objects
允许 使用 `final` 修饰的 Hasher 和 KeyEqual 对象
** All containers have been updated to support heterogeneous `count`, `equal_range` and `find`. ** All containers now implement the member function `contains`. ** `erase_if` has been implemented for all containers.
** 所有容器均已完成升级，支持异构查找操作 `count` 、 `equal_range` 及 `find` 。 ** 所有容器现均已实现成员函数 `contains` 。 ** 所有容器均已实现 `erase_if` 功能。
Release 1.36.0
版本 1.36.0

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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).
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）。
06/05/2026
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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).
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).
06/05/2026
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safe-html, strict-same
Unit identifier
49770
Source string location
:26
String age
06/05/2026
Last updated
06/06/2026
Source string age
06/05/2026
Translation file AsciiDoc file
doc/modules/ROOT/pages/changes_zh_Hans.adoc, string 13