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	`emplace` used to emulate the variadic pair constructors that	`emplace` 方法原先模拟了
	appeared in early {cpp}0x drafts. Since they were removed it no longer does so. It does emulate the new `piecewise_construct` pair constructors - only you need to use `boost::piecewise_construct`. To use the old emulation of the variadic constructors define `BOOST_UNORDERED_DEPRECATED_PAIR_CONSTRUCT`.	早期 C{plus}{plus}0x 草案中的变参 pair 构造函数。由于该特性已被移除，现不再提供此模拟实现。当前仅模拟新的 `piecewise_construct` pair 构造函数，但需使用 `boost::piecewise_construct` 作为参数。若需启用旧版变参构造函数的模拟行为，请定义宏 `BOOST_UNORDERED_DEPRECATED_PAIR_CONSTRUCT` 。
	Release 1.45.0	版本 1.45.0
	Fix a bug when inserting into an `unordered_map` or `unordered_set` using	修复了在使用返回 `value_type` 副本的迭代器插入 `unordered_map` 或 `unordered_set` 时的一个错误。
	iterators which returns `value_type` by copy.	(使用返回 `value_type` 副本)
	Release 1.43.0	版本 1.43.0
	{svn-ticket-url}/3966[Ticket 3966^]:	https://svn.boost.org/trac/boost/ticket/3966[问题单 3966] ：
	`erase_return_void` is now `quick_erase`, which is the http://home.roadrunner.com/~hinnant/issue_review/lwg-active.html#579[ current forerunner for resolving the slow erase by iterator^], although there's a strong possibility that this may change in the future. The old method name remains for backwards compatibility but is considered deprecated and will be removed in a future release.	`erase_return_void` 更名为 `quick_erase` （符合 http://home.roadrunner.com/~hinnant/issue_review/lwg-active.html#579[当前迭代器擦除缓慢的解决方案^]）。旧方法名出于向后兼容性予以保留，但已被视为弃用接口，将在未来版本中移除。
	Use Boost.Exception.	使用 Boost.Exception。
	Stop using deprecated `BOOST_HAS_*` macros.	停止使用已弃用的 `BOOST_HAS_*` 系列宏。
	Release 1.42.0	版本 1.42.0
	Support instantiating the containers with incomplete value types.	支持使用不完整值类型来实例化容器。
	Reduced the number of warnings (mostly in tests).	减少编译警告数量（主要出现在测试中）。
	Improved codegear compatibility.	提升 Codegear 兼容性。
	{svn-ticket-url}/3693[Ticket 3693^]:	https://svn.boost.org/trac/boost/ticket/3693[问题单 3693] ：
	Add `erase_return_void` as a temporary workaround for the current `erase` which can be inefficient because it has to find the next element to return an iterator.	新增 `erase_return_void` 作为临时解决方案，以应对当前 `erase` 方法因需查找下一元素返回迭代器而可能产生的效率问题。
	Add templated find overload for compatible keys.	新增针对兼容键的模板化 find 重载。
	{svn-ticket-url}/3773[Ticket 3773^]:	https://svn.boost.org/trac/boost/ticket/3773[问题单 3773] ：
	Add missing `std` qualifier to `ptrdiff_t`.	为 `ptrdiff_t` 添加缺失的 `std` 限定符。
	Some code formatting changes to fit almost all lines into 80 characters.	调整代码格式，使大多数代码行不超过 80 字符。
	Release 1.41.0 - Major update	版本 1.41.0 - 重大更新
	The original version made heavy use of macros to sidestep some of the older	初始版本曾大量使用
	compilers' poor template support. But since I no longer support those compilers and the macro use was starting to become a maintenance burden it has been rewritten to use templates instead of macros for the implementation classes.	宏来规避旧式编译器薄弱的模板支持能力。鉴于现已不再支持这些编译器，且宏的使用逐渐成为维护负担，现将实现类重构为使用模板替代宏。
	The container object is now smaller thanks to using `boost::compressed_pair`	通过 `boost::compressed_pair` 实现 EBO 及微调函数缓冲区
	for EBO and a slightly different function buffer - now using a bool instead of a member pointer.	（现使用 bool 替代成员指针），容器对象的内存占用得以减小。
	Buckets are allocated lazily which means that constructing an empty container	桶采用延迟分配机制，这意味着构造空容器时
	will not allocate any memory.	不会分配任何内存。
	Release 1.40.0	版本 1.40.0
	{svn-ticket-url}/2975[Ticket 2975^]:	https://svn.boost.org/trac/boost/ticket/2975[问题单 2975] ：
	Store the prime list as a preprocessor sequence - so that it will always get the length right if it changes again in the future.	将质数列表存储为预处理序列，确保未来再次调整列表长度时能自动保持正确。
	{svn-ticket-url}/1978[Ticket 1978^]:	https://svn.boost.org/trac/boost/ticket/1978[问题单 1978] ：

	English	Chinese (Simplified Han script)	Actions
	On machines with 64 bit std::size_t, use power of 2 buckets, with Thomas	64 位 std::size_t 机器上使用 2 的幂次桶数量，通过 Thomas
	Wang's hash function to pick which one to use. As modulus is very slow for 64 bit values.	Wang 哈希函数选择桶（因取模运算在 64 位值上极慢）。
	Fix warning due to accidental odd assignment.	修复因意外出现的异常赋值操作而产生的编译警告。
	The container now meets {cpp}11's complexity requirements, but to do so uses a little more memory. This means that `quick_erase` and `erase_return_void` are no longer required, they'll be removed in a future version.	该容器现满足 C{plus}{plus}11 的复杂度要求，但为此会占用稍多内存。这意味着 `quick_erase` 与 `erase_return_void` 接口已不再必需，将在未来版本中移除。
	{cpp}11 support has resulted in some breaking changes:	C{plus}{plus}11 支持导致部分破坏性变更：
	Equality comparison has been changed to the {cpp}11 specification.	相等性比较已改为遵循 C{plus}{plus}11 规范。
	pointers, rather than the allocator's `pointer` type.	而非分配器定义的 `pointer` 类型。
	`emplace` used to emulate the variadic pair constructors that	`emplace` 方法原先模拟了
	Fix a bug when inserting into an `unordered_map` or `unordered_set` using	修复了在使用返回 `value_type` 副本的迭代器插入 `unordered_map` 或 `unordered_set` 时的一个错误。
	Release 1.43.0	版本 1.43.0
	`erase_return_void` is now `quick_erase`, which is the http://home.roadrunner.com/~hinnant/issue_review/lwg-active.html#579[ current forerunner for resolving the slow erase by iterator^], although there's a strong possibility that this may change in the future. The old method name remains for backwards compatibility but is considered deprecated and will be removed in a future release.	`erase_return_void` 更名为 `quick_erase` （符合 http://home.roadrunner.com/~hinnant/issue_review/lwg-active.html#579[当前迭代器擦除缓慢的解决方案^]）。旧方法名出于向后兼容性予以保留，但已被视为弃用接口，将在未来版本中移除。
	Support instantiating the containers with incomplete value types.	支持使用不完整值类型来实例化容器。
	Reduced the number of warnings (mostly in tests).	减少编译警告数量（主要出现在测试中）。
	Improved codegear compatibility.	提升 Codegear 兼容性。
	{svn-ticket-url}/3693[Ticket 3693^]:	https://svn.boost.org/trac/boost/ticket/3693[问题单 3693] ：
	Add `erase_return_void` as a temporary workaround for the current `erase` which can be inefficient because it has to find the next element to return an iterator.	新增 `erase_return_void` 作为临时解决方案，以应对当前 `erase` 方法因需查找下一元素返回迭代器而可能产生的效率问题。
	The original version made heavy use of macros to sidestep some of the older	初始版本曾大量使用
	compilers' poor template support. But since I no longer support those compilers and the macro use was starting to become a maintenance burden it has been rewritten to use templates instead of macros for the implementation classes.	宏来规避旧式编译器薄弱的模板支持能力。鉴于现已不再支持这些编译器，且宏的使用逐渐成为维护负担，现将实现类重构为使用模板替代宏。
	{svn-ticket-url}/1978[Ticket 1978^]:	https://svn.boost.org/trac/boost/ticket/1978[问题单 1978] ：
	Implement `emplace` for all compilers.	为所有编译器实现 `emplace` 。
	are available.	可用时）。
	Added equality operators.	新增相等性判断运算符。
	Boost 1.35.0 Add-on - 31st March 2008	Boost 1.35.0 附加版本 - 2008年3月31日
	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。

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