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std::unordered_set::operator=

提供: cppreference.com

 
 
 
のstd :: unordered_set
メンバ関数
Original:
Member functions
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unordered_set::unordered_set
unordered_set::~unordered_set
unordered_set::operator=
unordered_set::get_allocator
イテレータ
Original:
Iterators
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unordered_set::begin
unordered_set::cbegin
unordered_set::end
unordered_set::cend
容量
Original:
Capacity
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unordered_set::erase
unordered_set::size
unordered_set::max_size
修飾子
Original:
Modifiers
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unordered_set::clear
unordered_set::insert
unordered_set::emplace
unordered_set::emplace_hint
unordered_set::erase
unordered_set::swap
ルック
Original:
Lookup
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unordered_set::count
unordered_set::find
unordered_set::equal_range
バケットインターフェイス
Original:
Bucket interface
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unordered_set::begin2
unordered_set::end2
unordered_set::bucket_count
unordered_set::max_bucket_count
unordered_set::bucket_size
unordered_set::bucket
ハッシュポリシー
Original:
Hash policy
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unordered_set::load_factor
unordered_set::max_load_factor
unordered_set::rehash
unordered_set::reserve
オブザーバー
Original:
Observers
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unordered_set::hash_function
unordered_set::key_eq
 
unordered_set& operator=( const unordered_set& other );
(1) (C + + 11以来)
unordered_set& operator=( unordered_set&& other );
(2) (C + + 11以来)
コンテナの内容を置き換え.
Original:
Replaces the contents of the container.
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1)
コピー代入演算子。 otherの内容のコピーを使って内容を置き換え.
Original:
Copy assignment operator. Replaces the contents with a copy of the contents of other.
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2)
代入演算子を移動します。ムーブセマンティクス(すなわちother内のデータは、このコンテナにotherから移動されている)を使用してotherのものと内容を置き換えます。 otherその後は有効ですが、特定されていない状態になっている.
Original:
Move assignment operator. Replaces the contents with those of other using move semantics (i.e. the data in other is moved from other into this container). other is in valid, but unspecified state afterwards.
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目次

[編集] パラメータ

other -
ソースとして使用する別のコンテナ
Original:
another container to be used as source
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[編集] 値を返します

*this

[編集] 複雑

1)
容器の大きさに比例.
Original:
Linear in the size of the container.
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2)
定数.
Original:
Constant.
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[編集]

次のコードは、別のを割り当てることstd::unordered_setを使用しています
Original:
The following code uses to assign one std::unordered_set to another:
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#include <unordered_set>
#include <iostream>
 
void display_sizes(const std::unordered_set<int> &nums1,
                   const std::unordered_set<int> &nums2,
                   const std::unordered_set<int> &nums3)
{
    std::cout << "nums1: " << nums1.size() 
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::unordered_set<int> nums1 {3, 1, 4, 6, 5, 9};
    std::unordered_set<int> nums2; 
    std::unordered_set<int> nums3;
 
    std::cout << "Initially:\n";
    display_sizes(nums1, nums2, nums3);
 
    // copy assignment copies data from nums1 to nums2
    nums2 = nums1;
 
    std::cout << "After assigment:\n"; 
    display_sizes(nums1, nums2, nums3);
 
    // move assignment moves data from nums1 to nums3,
    // modifying both nums1 and nums3
    nums3 = std::move(nums1);
 
    std::cout << "After move assigment:\n"; 
    display_sizes(nums1, nums2, nums3);
}

Output:

Initially:
nums1: 4 nums2: 0 nums3: 0
After assigment:
nums1: 4 nums2: 4 nums3: 0
After move assigment:
nums1: 0 nums2: 4 nums3: 4

[編集] も参照してください

unordered_setを構築します
Original:
constructs the unordered_set
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(パブリックメンバ関数) [edit]