2. Boost Unordered Translation (zh_Hans)
3. Doc / Modules / Root / Pages / Reference / Unordered Map (adoc)
4. English
5. Zen

181 :791
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ``` 98/10000 · 98
:795 :795
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent key. 150/10000 · 150
183 :797
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — `position` is a suggestion to where the element should be inserted. 67/10000 · 67
184 :800
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. 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. + + If `args...` is of the form `k,v`, it delays constructing the whole object until it is certain that an element should be inserted, using only the `k` argument to check. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`. 1083/10000 · 1083
:811 :811
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
186 :813
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Copy Insert 11/10000 · 11
187 :814
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ std::pair<iterator, bool> insert(const value_type& obj); ``` 67/10000 · 67
:818 :818
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts `obj` in the container if and only if there is no element in the container with an equivalent key. 106/10000 · 106
189 :821
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. 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 factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. 636/10000 · 636
:830 :830
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
191 :832
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Move Insert 11/10000 · 11
192 :833
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ std::pair<iterator, bool> insert(value_type&& obj); ``` 62/10000 · 62
:837 :837
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts `obj` in the container if and only if there is no element in the container with an equivalent key. 106/10000 · 106
194 :840
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. 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 factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. 636/10000 · 636
:849 :849
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — --- 3/10000 · 3
196 :851
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Emplace Insert 14/10000 · 14
197 :852
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — ```c++ template<class P> std::pair<iterator, bool> insert(P&& obj); ``` 71/10000 · 71
198 :856
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Inserts an element into the container by performing `emplace(std::forward<P>(value))`. 86/10000 · 86
:858 :858
	English ↹ ↵ NBS … “ ” ‘ ’ ﹙-﹚ ‐ – — Only participates in overload resolution if `std::is_constructible<value_type, P&&>::value` is `true`. 102/10000 · 102
200 :861
	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. 223/10000 · 223