std::partition_point
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Déclaré dans l'en-tête <algorithm> | ||
template<class ForwardIt, class UnaryPredicate > ForwardIt partition_point( ForwardIt first, ForwardIt last, UnaryPredicate p); | (1) | (depuis C++11) |
Examine la partitionné (comme par std::partition) Plage
[first, last) et localise la fin de la première partition, c'est le premier élément qui ne satisfait pas p ou si last dernière si tous les éléments de satisfaire p .Original:
Examines the partitioned (as if by std::partition) range
[first, last) and locates the end of the first partition, that is, the first element that does not satisfy p or last if last if all elements satisfy p.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Sommaire |
[modifier]Paramètres
| first, last | - | la gamme partitionné d'éléments à examiner Original: the partitioned range of elements to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| p | - | prédicat unéaire qui retourne true pour les éléments qui se trouvent au début de la plage . Original: for the elements found in the beginning of the range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. L'expression p(v) doit pouvoir être convertie à bool pour tout argument |
| Type requirements | ||
-ForwardIt must meet the requirements of ForwardIterator. | ||
[modifier]Retourne la valeur
L'itérateur delà de la fin de la première partition à l'intérieur ou
[first, last)last si tous les éléments de satisfaire p .Original:
The iterator past the end of the first partition within
[first, last) or last if all elements satisfy p.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[modifier]Complexité
Logarithmique de la distance entre
first et lastOriginal:
Logarithmic in the distance between
first and lastThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[modifier]Exemple
#include <algorithm>#include <array>#include <iostream>#include <iterator> int main(){std::array<int, 9> v ={1, 2, 3, 4, 5, 6, 7, 8, 9}; auto is_even =[](int i){return i %2==0;};std::partition(v.begin(), v.end(), is_even); auto p = std::partition_point(v.begin(), v.end(), is_even); std::cout<<"Before partition:\n ";std::copy(v.begin(), p, std::ostream_iterator<int>(std::cout, " "));std::cout<<"\nAfter partition:\n ";std::copy(p, v.end(), std::ostream_iterator<int>(std::cout, " "));}
Résultat :
Before partition: 8 2 6 4 After partition: 5 3 7 1 9
[modifier]Voir aussi
(C++11) | vérifie si une plage est triée dans l'ordre croissant Original: checks whether a range is sorted into ascending order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) |
