unordered_map::operator=
Replaces the elements of this unordered_map using the elements from another unordered_map.
unordered_map& operator=(
const unordered_map& _Right
);
unordered_map& operator=(
unordered_map&& _Right
);
Parameters
Parameter |
Description |
_Right |
The unordered_map that the operator function assigns content from. |
Remarks
The first version copies all of the elements from _Right to this unordered_map.
The second version moves all of the elements from _Right to this unordered_map.
Any elements that are in this unordered_map before operator= executes are discarded.
Example
// unordered_map_operator_as.cpp
// compile with: /EHsc
#include <unordered_map>
#include <iostream>
int main( )
{
using namespace std;
unordered_map<int, int> v1, v2, v3;
unordered_map<int, int>::iterator iter;
v1.insert(pair<int, int>(1, 10));
cout << "v1 = " ;
for (iter = v1.begin(); iter != v1.end(); iter++)
cout << iter->second << " ";
cout << endl;
v2 = v1;
cout << "v2 = ";
for (iter = v2.begin(); iter != v2.end(); iter++)
cout << iter->second << " ";
cout << endl;
// move v1 into v2
v2.clear();
v2 = move(v1);
cout << "v2 = ";
for (iter = v2.begin(); iter != v2.end(); iter++)
cout << iter->second << " ";
cout << endl;
}
Output
v1 = 10
v2 = 10
v2 = 10
Requirements
Header: <unordered_map>
Namespace: std