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std::multimap::operator=

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< cpp‎ | container‎ | multimap

 
 
 
std::multimap
Member-Funktionen
Original:
Member functions
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multimap::multimap
multimap::~multimap
multimap::operator=
multimap::get_allocator
Iteratoren
Original:
Iterators
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multimap::begin
multimap::cbegin

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

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

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

(C++11)
Kapazität
Original:
Capacity
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multimap::erase
multimap::size
multimap::max_size
Modifiers
Original:
Modifiers
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multimap::clear
multimap::insert
multimap::emplace(C++11)
multimap::emplace_hint(C++11)
multimap::erase
multimap::swap
Lookup
Original:
Lookup
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multimap::count
multimap::find
multimap::equal_range
multimap::lower_bound
multimap::upper_bound
Beobachter
Original:
Observers
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multimap::key_comp
multimap::value_comp
 
multimap& operator=( const multimap& other );
(1)
multimap& operator=( multimap&& other );
(2) (seit C++11)
Ersetzt den Inhalt des Behälters .
Original:
Replaces the contents of the container.
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1)
Kopieren Zuweisungsoperator. Ersetzt den Inhalt mit einer Kopie des Inhalts other .
Original:
Copy assignment operator. Replaces the contents with a copy of the contents of other.
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2)
Bewegen Zuweisungsoperator. Ersetzt den Inhalt mit denen unter Verwendung other bewegen Semantik (dh die Daten in other aus other in diesen Behälter bewegt wird). other ist gültig, aber nicht näher Zustand danach .
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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Inhaltsverzeichnis

[Bearbeiten] Parameter

other -
ein weiterer Container, die als Quelle verwendet werden
Original:
another container to be used as source
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[Bearbeiten] Rückgabewert

*this

[Bearbeiten] Komplexität

1)
Linear in der Größe des Behälters .
Original:
Linear in the size of the container.
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2)
Constant .
Original:
Constant.
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[Bearbeiten] Beispiel

Der folgende Code verwendet um ein std::multimap einem anderen zuweisen:
Original:
The following code uses to assign one std::multimap to another:
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#include <map>
#include <iostream>
 
void display_sizes(const std::multimap<int, int> &nums1,
                   const std::multimap<int, int> &nums2,
                   const std::multimap<int, int> &nums3)
{
    std::cout << "nums1: " << nums1.size() 
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::multimap<int, int> nums1 {{3, 1}, {4, 1}, {5, 9}};
    std::multimap<int, int> nums2;
    std::multimap<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

[Bearbeiten] Siehe auch

konstruiert die multimap
(öffentliche Elementfunktion) [edit]