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unordered_multiset::swap

Swaps the contents of two containers.

void swap(unordered_multiset& right);

Parameters

  • right
    The container to swap with.

Remarks

The member function swaps the controlled sequences between *this and right. If unordered_multiset::get_allocator() == right.get_allocator(), it does so in constant time, it throws an exception only as a result of copying the stored traits object of type Tr, and it invalidates no references, pointers, or iterators that designate elements in the two controlled sequences. Otherwise, it performs a number of element assignments and constructor calls proportional to the number of elements in the two controlled sequences.

Example

 

// std_tr1__unordered_set__unordered_multiset_swap.cpp 
// compile with: /EHsc 
#include <unordered_set> 
#include <iostream> 
 
typedef std::unordered_multiset<char> Myset; 
int main() 
    { 
    Myset c1; 
 
    c1.insert('a'); 
    c1.insert('b'); 
    c1.insert('c'); 
 
// display contents " [c] [b] [a]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
    Myset c2; 
 
    c2.insert('d'); 
    c2.insert('e'); 
    c2.insert('f'); 
 
    c1.swap(c2); 
 
// display contents " [f] [e] [d]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
    swap(c1, c2); 
 
// display contents " [c] [b] [a]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
    return (0); 
    } 
 
 [c] [b] [a]
 [f] [e] [d]
 [c] [b] [a]

Requirements

Header: <unordered_set>

Namespace: std

See Also

Reference

<unordered_set>

unordered_multiset Class

swap Function (unordered_multiset)

Other Resources

<unordered_set> Members