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307 :1312

	English Insert Node and Visit 21/10000 · 21
308 :1313

	English ```c++ template<class F1, class F2> insert_return_type insert_and_visit(node_type&& nh, F1 f1, F2 f2); template<class F1, class F2> insert_return_type insert_and_cvisit(node_type&& nh, F1 f1, F2 f2); ``` 203/10000 · 203
309 :1320

	English If `nh` is empty, does nothing. Otherwise, inserts the associated element in the table if and only if there is no element in the table with a key equivalent to `nh.key()`, and then invokes `f1` with a non-const reference to the newly inserted element. Otherwise, invokes `f2` with a reference to the equivalent element; such reference is const iff `insert_or_cvisit` is used. 375/10000 · 375
:1326 :1326

	English Returns:;; An `insert_return_type` object constructed from `inserted` and `node`: + 83/10000 · 83
:1327 :1327

	English If `nh` is empty, `inserted` is `false` and `node` is empty. 60/10000 · 60
:1328 :1328

	English Otherwise if the insertion took place, `inserted` is true and `node` is empty. 78/10000 · 78
:1329 :1329

	English If the insertion failed, `inserted` is false and `node` has the previous value of `nh`. 87/10000 · 87
314 :1330

	English Throws:;; If an exception is thrown by an operation other than a call to `hasher` or call to `f1` or `f2`, the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal. 295/10000 · 295
:1334 :1334

	English --- 3/10000 · 3
316 :1336

	English try_emplace 11/10000 · 11
317 :1337

	English ```c++ template<class... Args> bool try_emplace(const key_type& k, Args&&... args); template<class... Args> bool try_emplace(key_type&& k, Args&&... args); template<class K, class... Args> bool try_emplace(K&& k, Args&&... args); ``` 233/10000 · 233
318 :1343

	English Inserts an element constructed from `k` and `args` into the table if there is no existing element with key `k` contained within it. 131/10000 · 131
319 :1346

	English Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; This function is similiar to xref:#concurrent_node_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++ 336/10000 · 336
:1354 :1354

	English value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<Args>(args)...)) 133/10000 · 133
:1359 :1359

	English value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<Args>(args)...)) ``` 135/10000 · 135
322 :1364

	English unlike xref:#concurrent_node_map_emplace[emplace], which simply forwards all arguments to ``value_type``'s constructor. 119/10000 · 119
323 :1366

	English The `template<class K, class\... Args>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. 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. 373/10000 · 373
:1368 :1368

	English -- 2/10000 · 2
:1370 :1370

	English --- 3/10000 · 3
326 :1372

	English try_emplace_or_[c]visit 23/10000 · 23

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