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319 :1284

	English erase_return_void 17/10000 · 17
320 :1285

	English ```c++ void erase_return_void(const_iterator position); ``` 59/10000 · 59
:1289 :1289

	English Erase the element pointed to by `position`. 43/10000 · 43
:1292 :1292

	English Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated. 454/10000 · 454
:1297 :1297

	English --- 3/10000 · 3
324 :1299

	English swap 4/10000 · 4
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

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