swap Function (unordered_multimap)
Vertauscht den Inhalt von zwei Containern.
template<class Key, class Ty, class Hash, class Pred, class Alloc>
void swap(
unordered_multimap <Key, Ty, Hash, Pred, Alloc>& left,
unordered_multimap <Key, Ty, Hash, Pred, Alloc>& right);
Parameter
Key
Der Schlüsseltyp.Ty
Der zugeordnete Typ.Hash
Der Hashfunktionsobjekttyp.Pred
Der equality vergleichsfunktions objekttyp.Alloc
Die allocator-Klasse.left
Der erste auszulagern Container.right
Der zweite auszulagern Container.
Hinweise
Die Vorlagenfunktion führt left.unordered_multimap::swap(right)aus.
Beispiel
// std_tr1__unordered_map__u_mm_swap.cpp
// compile with: /EHsc
#include <unordered_map>
#include <iostream>
typedef std::unordered_multimap<char, int> Mymap;
int main()
{
Mymap c1;
c1.insert(Mymap::value_type('a', 1));
c1.insert(Mymap::value_type('b', 2));
c1.insert(Mymap::value_type('c', 3));
// display contents " [c 3] [b 2] [a 1]"
for (Mymap::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " [" << it->first << ", " << it->second << "]";
std::cout << std::endl;
Mymap c2;
c2.insert(Mymap::value_type('d', 4));
c2.insert(Mymap::value_type('e', 5));
c2.insert(Mymap::value_type('f', 6));
c1.swap(c2);
// display contents " [f 6] [e 5] [d 4]"
for (Mymap::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " [" << it->first << ", " << it->second << "]";
std::cout << std::endl;
swap(c1, c2);
// display contents " [c 3] [b 2] [a 1]"
for (Mymap::const_iterator it = c1.begin();
it != c1.end(); ++it)
std::cout << " [" << it->first << ", " << it->second << "]";
std::cout << std::endl;
return (0);
}
Anforderungen
Header: <unordered_map>
Namespace: std