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325 :1300

	English ```c++ void swap(unordered_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value && boost::is_nothrow_swappable_v<Hash> && boost::is_nothrow_swappable_v<Pred>); ``` 190/10000 · 190
326 :1307

	English Swaps the contents of the container with the parameter. 55/10000 · 55
:1309 :1309

	English If `Allocator::propagate_on_container_swap` is declared and `Allocator::propagate_on_container_swap::value` is `true` then the containers' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior. 237/10000 · 237
328 :1312

	English Throws:;; Doesn't throw an exception unless it is thrown by the copy constructor or copy assignment operator of `key_equal` or `hasher`. Notes:;; The exception specifications aren't quite the same as the C++11 standard, as the equality predicate and hash function are swapped using their copy constructors. 306/10000 · 306
:1315 :1315

	English --- 3/10000 · 3
330 :1317

	English clear 5/10000 · 5
331 :1318

	English ```c++ void clear(); ``` 24/10000 · 24
332 :1322

	English Erases all elements in the container. 37/10000 · 37
333 :1325

	English Postconditions:;; `size() == 0` Throws:;; Never throws an exception. 68/10000 · 68
:1328 :1328

	English --- 3/10000 · 3
335 :1330

	English merge 5/10000 · 5
336 :1331

	English ```c++ template<class H2, class P2> void merge(unordered_map<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_map<Key, T, H2, P2, Allocator>&& source); template<class H2, class P2> void merge(unordered_multimap<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_multimap<Key, T, H2, P2, Allocator>&& source); ``` 386/10000 · 386
337 :1342

	English Attempt to "merge" two containers by iterating `source` and extracting any node in `source` that is not contained in `this` and then inserting it into `this`. 160/10000 · 160
338 :1345

	English Because `source` can have a different hash function and key equality predicate, the key of each node in `source` is rehashed using `this\->hash_function()` and then, if required, compared using `this\->key_eq()`. 212/10000 · 212
339 :1348

	English The behavior of this function is undefined if `this\->get_allocator() != source.get_allocator()`. 97/10000 · 97
340 :1350

	English This function does not copy or move any elements and instead simply relocates the nodes from `source` into `*this`. 115/10000 · 115
341 :1354

	English Notes:;; + -- 13/10000 · 13
342 :1357

	English Pointers and references to transferred elements remain valid. 61/10000 · 61
343 :1358

	English Invalidates iterators to transferred elements. 46/10000 · 46
344 :1359

	English Invalidates iterators belonging to `*this`. 43/10000 · 43

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