2. Boost Unordered Translation (zh_Hans)
3. English
4. Zen

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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — image::benchmarks-concurrent_map/vs-x86/Parallel workload.xlsx.5M, 0.5.png[width=250,window=_blank,link="_images/benchmarks-concurrent_map/vs-x86/Parallel workload.xlsx.5M, 0.5.png"] 182/10000 · 182
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Equality comparison has been changed to the {cpp}11 specification. 66/10000 · 66
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts an element into the container by performing `emplace_hint(hint, std::forward<P>(value))`. 97/10000 · 97
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. Returns:;; If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + This overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs and neither `iterator` nor `const_iterator` are implicitly convertible from `K`. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. 1205/10000 · 1205
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. + + This overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs and neither `iterator` nor `const_iterator` are implicitly convertible from `K`. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. 993/10000 · 993
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ template<class... Args> bool emplace(Args&&... args); ``` 64/10000 · 64
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + A call of the form `insert(x)`, where `x` is equally convertible to both `const value_type&` and `const init_type&`, is not ambiguous and selects the `init_type` overload. 457/10000 · 457
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. 281/10000 · 281
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Returns:;; An iterator pointing to the inserted element. Notes:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. 454/10000 · 454
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts an object, constructed with the arguments `args`, in the table if and only if there is no element in the table with an equivalent key. 142/10000 · 142
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into the container from `*first`. Throws:;; When inserting a single element, if an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. 428/10000 · 428
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ node_type extract(const_iterator position); ``` 54/10000 · 54
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; This function is similiar to xref:#unordered_flat_map_emplace[emplace], with the difference that no `value_type` is constructed if there is an element with an equivalent key; otherwise, the construction is of the form: + + -- ```c++ 579/10000 · 579
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — image::benchmarks-concurrent_map/vs-x86/Parallel workload.xlsx.5M, 0.99.png[width=250,window=_blank,link="_images/benchmarks-concurrent_map/vs-x86/Parallel workload.xlsx.5M, 0.99.png"] 184/10000 · 184
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — In a container with equivalent keys, elements in a group with equal keys used to have to be in the same order to be considered equal, now they can be a permutation of each other. To use the old behavior define the macro `BOOST_UNORDERED_DEPRECATED_EQUALITY`. 258/10000 · 258
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Only participates in overload resolution if `std::is_constructible<value_type, P&&>::value` is `true`. 102/10000 · 102
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
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	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts an object, constructed with the arguments `args`, in the table if and only if there is no element in the table with an equivalent key. 142/10000 · 142