std::swap_ranges
De cppreference.com
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| Dclar dans l'en-tte <algorithm>
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template< class ForwardIt1, class ForwardIt2 > ForwardIt2 swap_ranges( ForwardIt1 first1, ForwardIt1 last1, ForwardIt2 first2 ) |
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change les lments de l'intervalle [first1, last1) avec ceux de l'intervalle commenant first2.
Paramtres
| first1, last1 | - | le premier intervalle d'lments changer |
| first2 | - | dbut du second intervalle d'lments changer |
| Type requirements | ||
-ForwardIt1, ForwardIt2 must meet the requirements of ForwardIterator.
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-The types of dereferenced ForwardIt1 and ForwardIt2 must meet the requirements of Swappable
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Retourne la valeur
Itrateur sur l'lment suivant le dernier lment chang dans l'intervalle commenant first2.
Mise en uvre possible
template<class ForwardIt1, class ForwardIt2>
ForwardIt1 swap_ranges(ForwardIt1 first1,
ForwardIt1 last1,
ForwardIt2 first2)
{
while (first1 != last1) {
std::iter_swap(first1++, first2++);
}
return first2;
}
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Exemple
Dmontre l'change de sous-intervalles de conteneurs diffrents
#include <algorithm>
#include <list>
#include <vector>
#include <iostream>
int main()
{
std::vector<int> v = {1, 2, 3, 4, 5};
std::list<int> l = {-1, -2, -3, -4, -5};
std::swap_ranges(v.begin(), v.begin()+3, l.begin());
for(int n : v)
std::cout << n << ' ';
std::cout << '\n';
for(int n : l)
std::cout << n << ' ';
std::cout << '\n';
}
Rsultat :
-1 -2 -3 4 5
1 2 3 -4 -5
Complexit
linaire en la distance entre first et last
Voir aussi
permute les lments points par deux itrateurs Original: swaps the elements pointed to by two iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction gnrique) | |
change les valeurs de deux objets Original: swaps the values of two objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction gnrique) | |