名前空間
変種
操作

std::map::operator=

提供: cppreference.com
< cpp‎ | container‎ | map

 
 
 
std::map
メンバ関数
Original:
Member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::map
map::~map
map::operator=
map::get_allocator
要素アクセスの循環参照を解除するために使用されている
Original:
Element access
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::at
map::operator[]
イテレータ
Original:
Iterators
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::begin
map::cbegin

(C++11)
map::end
map::cend

(C++11)
map::rbegin
map::crbegin

(C++11)
map::rend
map::crend

(C++11)
容量
Original:
Capacity
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::empty
map::size
map::max_size
修飾子
Original:
Modifiers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::clear
map::insert
map::emplace(C++11)
map::emplace_hint(C++11)
map::erase
map::swap
ルック
Original:
Lookup
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::count
map::find
map::equal_range
map::lower_bound
map::upper_bound
オブザーバー
Original:
Observers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::key_comp
map::value_comp
 
map& operator=( const map& other );
(1)
map& operator=( map&& 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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

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
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
2)
定数.
Original:
Constant.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[編集]

次のコードは、別のを割り当てることstd::mapを使用しています
Original:
The following code uses to assign one std::map to another:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <map>
#include <iostream>
 
void display_sizes(const std::map<int, int> &nums1,
                   const std::map<int, int> &nums2,
                   const std::map<int, int> &nums3)
{
    std::cout << "nums1: " << nums1.size() 
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::map<int, int> nums1 {{3, 1}, {4, 1}, {5, 9}};
    std::map<int, int> nums2;
    std::map<int, 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

mapを構築します
Original:
constructs the map
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(パブリックメンバ関数) [edit]