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	Release 1.64.0	版本 1.64.0
	Initial support for new {cpp}17 member functions:	初步支持 C{plus}{plus}17 新成员函数：
	`insert_or_assign` and `try_emplace` in `unordered_map`,	`unordered_map` 中的 `insert_or_assign` 和 `try_emplace`，
	Initial support for `merge` and `extract`.	初步支持 `merge` 与 `extract` 操作。
	Does not include transferring nodes between `unordered_map` and `unordered_multimap` or between `unordered_set` and `unordered_multiset` yet. That will hopefully be in the next version of Boost.	目前尚未支持在 `unordered_map` 与 `unordered_multimap` 之间，或 `unordered_set` 与 `unordered_multiset` 之间转移节点。该功能有望在下一版 Boost 中提供。
	Release 1.63.0	版本 1.63.0
	Check hint iterator in `insert`/`emplace_hint`.	检查 `insert` / `emplace_hint` 操作中提示迭代器的有效性。
	Fix some warnings, mostly in the tests.	修复部分警告（主要出现在测试中）。
	Manually write out `emplace_args` for small numbers of arguments -	为参数数量较少的情况手动编写 `emplace_args` 代码，
	should make template error messages a little more bearable.	以减轻模板错误消息的负担。
	Remove superfluous use of `boost::forward` in emplace arguments,	移除 emplace 参数中多余的 `boost::forward` 调用，
	which fixes emplacing string literals in old versions of Visual {cpp}.	以修复旧版 Visual C{plus}{plus} 中字面量字符串的就地构造问题。
	Fix an exception safety issue in assignment. If bucket allocation	修复赋值操作中的异常安全问题。若桶分配过程
	throws an exception, it can overwrite the hash and equality functions while leaving the existing elements in place. This would mean that the function objects wouldn't match the container elements, so elements might be in the wrong bucket and equivalent elements would be incorrectly handled.	抛出异常，可能导致哈希函数与相等性判断函数被覆盖，而现有元素仍保留在容器中。这将造成函数对象与容器元素不匹配，进而引发元素错置桶位及等价元素处理错误的问题。
	Various reference documentation improvements.	多项参考文档改进。
	Better allocator support ({svn-ticket-url}/12459[#12459^]).	增强的分配器支持(https://svn.boost.org/trac/boost/ticket/12459[#12459])。
	Make the no argument constructors implicit.	将无参构造函数改为隐式声明。
	Implement missing allocator aware constructors.	实现缺失的分配器感知构造函数。
	Fix assigning the hash/key equality functions for empty containers.	修复空容器在设置哈希函数与键值相等性判断函数时存在的问题。
	Remove unary/binary_function from the examples in the documentation.	从文档示例中移除 unary/binary_function。
	They are removed in {cpp}17.	这两者在 C{plus}{plus}17 中已被移除。
	Support 10 constructor arguments in emplace. It was meant to support up to 10	emplace 方法现支持 10 个构造参数。其设计本应支持最多 10 个参数，
	arguments, but an off by one error in the preprocessor code meant it only supported up to 9.	但由于预处理代码中存在差一错误，仅支持 9 个参数。
	Release 1.62.0	版本 1.62.0
	Remove use of deprecated `boost::iterator`.	停止使用已弃用的 `boost::iterator` 组件。
	Remove `BOOST_NO_STD_DISTANCE` workaround.	移除 `BOOST_NO_STD_DISTANCE` 的兼容性代码。
	Remove `BOOST_UNORDERED_DEPRECATED_EQUALITY` warning.	移除 `BOOST_UNORDERED_DEPRECATED_EQUALITY` 警告。
	Simpler implementation of assignment, fixes an exception safety issue	采用更简化的赋值操作实现，修复了
	for `unordered_multiset` and `unordered_multimap`. Might be a little slower.	`unordered_multiset` 与 `unordered_multimap` 的异常安全问题，但性能可能略有下降。
	Stop using return value SFINAE which some older compilers have issues	停止使用返回值SFINAE技术，以避免部分旧版本编译器的
	with.	兼容性问题。

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	** Use `boost::to_address`, which has the proposed {cpp}20 semantics, rather than the old custom implementation.	** 使用具有 C{plus}{plus}20 提案语义的 `boost::to_address` ，来替代原有的自定义实现。
	Add `element_type` to iterators, so that `std::pointer_traits`	向迭代器添加 `element_type` 类型定义，以支持 `std::pointer_traits` 的
	Use `std::piecewise_construct` on recent versions of Visual {cpp},	在新版 Visual C{plus}{plus} 及
	Use `std::iterator_traits` rather than the boost iterator traits	使用 `std::iterator++_++traits` 替代 boost 迭代器特征库，
	Update some Boost include paths.	更新部分 Boost 头文件包含路径。
	Rename some internal methods, and variables.	重命名部分内部方法和变量。
	Various testing improvements.	多项测试改进。
	Miscellaneous internal changes.	多项内部变更。
	Release 1.66.0	版本 1.66.0
	Simpler move construction implementation.	更简化的移动构造实现。
	Documentation fixes ({github-pr-url}/6[GitHub #6^]).	文档修正(https://github.com/boostorg/unordered/pull/6[GitHub #6])。
	Release 1.65.0	版本 1.65.0
	Manually write out `emplace_args` for small numbers of arguments -	为参数数量较少的情况手动编写 `emplace_args` 代码，
	Remove superfluous use of `boost::forward` in emplace arguments,	移除 emplace 参数中多余的 `boost::forward` 调用，
	which fixes emplacing string literals in old versions of Visual {cpp}.	以修复旧版 Visual C{plus}{plus} 中字面量字符串的就地构造问题。
	Better allocator support ({svn-ticket-url}/12459[#12459^]).	增强的分配器支持(https://svn.boost.org/trac/boost/ticket/12459[#12459])。
	Make the no argument constructors implicit.	将无参构造函数改为隐式声明。
	Implement missing allocator aware constructors.	实现缺失的分配器感知构造函数。
	Fix assigning the hash/key equality functions for empty containers.	修复空容器在设置哈希函数与键值相等性判断函数时存在的问题。
	Remove unary/binary_function from the examples in the documentation.	从文档示例中移除 unary/binary_function。
	Remove `BOOST_NO_STD_DISTANCE` workaround.	移除 `BOOST_NO_STD_DISTANCE` 的兼容性代码。
	Remove `BOOST_UNORDERED_DEPRECATED_EQUALITY` warning.	移除 `BOOST_UNORDERED_DEPRECATED_EQUALITY` 警告。
	Simpler implementation of assignment, fixes an exception safety issue	采用更简化的赋值操作实现，修复了
	with.	兼容性问题。
	Fix move assignment with stateful, propagate_on_container_move_assign	修复当使用具有状态且设置了propagate_on_container_move_assign 的分配器时，
	allocators ({svn-ticket-url}/10777[#10777^]).	移动赋值操作存在的缺陷(https://svn.boost.org/trac/boost/ticket/10777[#10777])。
	Fix rare exception safety issue in move assignment.	修复移动赋值操作中一处罕见的异常安全问题。
	Fix potential overflow when calculating number of buckets to allocate	修复计算待分配桶数量时可能出现的溢出问题
	({github-pr-url}/4[GitHub #4^]).	(https://github.com/boostorg/unordered/pull/4[GitHub #4])。
	Release 1.56.0	版本 1.56.0

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