Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Set (adoc)

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:1466 :1466

	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
408 :1469

	English Effects:;; `x.swap(y)` 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. 329/10000 · 329
:1473 :1473

	English --- 3/10000 · 3
410 :1475

	English erase_if 8/10000 · 8
411 :1476

	English ```c++ template<class K, class H, class P, class A, class Predicate> typename unordered_set<K, H, P, A>::size_type erase_if(unordered_set<K, H, P, A>& c, Predicate pred); ``` 174/10000 · 174
412 :1482

	English Traverses the container `c` and removes all elements for which the supplied predicate returns `true`. 101/10000 · 101
413 :1485

	English Returns:;; The number of erased elements. Notes:;; Equivalent to: + + ```c++ auto original_size = c.size(); for (auto i = c.begin(), last = c.end(); i != last; ) { if (pred(*i)) { i = c.erase(i); } else { ++i; } } return original_size - c.size(); ``` 250/10000 · 250
414 :1500

	English Serialization 13/10000 · 13
415 :1502

	English ``unordered_set``s can be archived/retrieved by means of link:../../../../../serialization/index.html[Boost.Serialization^] using the API provided by this library. Both regular and XML archives are supported. 208/10000 · 208
416 :1506

	English Saving an unordered_set to an archive 37/10000 · 37
417 :1508

	English Saves all the elements of an `unordered_set` `x` to an archive (XML archive) `ar`. 82/10000 · 82
418 :1511

	English Requires:;; `value_type` is serializable (XML serializable), and it supports Boost.Serialization `save_construct_data`/`load_construct_data` protocol (automatically suported by https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^] types). 272/10000 · 272
:1517 :1517

	English --- 3/10000 · 3
420 :1519

	English Loading an unordered_set from an archive 40/10000 · 40
421 :1521

	English Deletes all preexisting elements of an `unordered_set` `x` and inserts from an archive (XML archive) `ar` restored copies of the elements of the original `unordered_set` `other` saved to the storage read by `ar`. 212/10000 · 212
422 :1526

	English Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. `x.key_equal()` is functionally equivalent to `other.key_equal()`. Note:;; If the archive was saved using a release of Boost prior to Boost 1.84, the configuration macro `BOOST_UNORDERED_ENABLE_SERIALIZATION_COMPATIBILITY_V0` has to be globally defined for this operation to succeed; otherwise, an exception is thrown. 423/10000 · 423
:1532 :1532

	English --- 3/10000 · 3
424 :1534

	English Saving an iterator/const_iterator to an archive 47/10000 · 47
425 :1536

	English Saves the positional information of an `iterator` (`const_iterator`) `it` to an archive (XML archive) `ar`. `it` can be and `end()` iterator. 141/10000 · 141
426 :1540

	English Requires:;; The `unordered_set` `x` pointed to by `it` has been previously saved to `ar`, and no modifying operations have been issued on `x` between saving of `x` and saving of `it`. 183/10000 · 183

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