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std::forward_list::merge

De cppreference.com

 
 
 
std::forward_list
Les fonctions membres
Original:
Member functions
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forward_list::forward_list
forward_list::~forward_list
forward_list::operator=
forward_list::assign
forward_list::get_allocator
Elément d'accès
Original:
Element access
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forward_list::front
Les itérateurs
Original:
Iterators
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forward_list::before_begin
forward_list::cbefore_begin
forward_list::begin
forward_list::cbegin
forward_list::end
forward_list::cend
Capacité
Original:
Capacity
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forward_list::empty
forward_list::max_size
Modificateurs
Original:
Modifiers
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forward_list::clear
forward_list::insert_after
forward_list::emplace_after
forward_list::erase_after
forward_list::push_front
forward_list::emplace_front
forward_list::pop_front
forward_list::resize
forward_list::swap
Opérations
Original:
Operations
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forward_list::merge
forward_list::splice_after
forward_list::remove
forward_list::remove_if
forward_list::reverse
forward_list::unique
forward_list::sort
 
void merge( forward_list& other );
(1) (depuis C++11)
void merge( forward_list&& other );
(1) (depuis C++11)
template <class Compare>
void merge( forward_list& other, Compare comp );
(2) (depuis C++11)
template <class Compare>
void merge( forward_list&& other, Compare comp );
(2) (depuis C++11)
Fusionne deux listes triées en une seule. Les listes doivent être triées en ordre croissant .
Original:
Merges two sorted lists into one. The lists should be sorted into ascending order.
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Aucun élément n'est copié. Le other récipient est vide après l'opération. La fonction ne fait rien si this == &other. Si get_allocator() != other.get_allocator(), le comportement est indéfini. Pas itérateurs ou les références deviennent invalidé, sauf que les itérateurs d'éléments déplacés maintenant se référer à *this, pas dans other. La première version utilise operator< de comparer les éléments, la deuxième version utilise la fonction de comparaison donnée comp .
Original:
No elements are copied. The container other becomes empty after the operation. The function does nothing if this == &other. If get_allocator() != other.get_allocator(), the behavior is undefined. No iterators or references become invalidated, except that the iterators of moved elements now refer into *this, not into other. The first version uses operator< to compare the elements, the second version uses the given comparison function comp.
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Sommaire

[modifier] Paramètres

other -
un autre récipient de fusion
Original:
another container to merge
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comp - comparison function which returns ​true if the first argument is less than the second.

The signature of the comparison function should be equivalent to the following:

 bool cmp(const Type1 &a, const Type2 &b);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types Type1 and Type2 must be such that an object of type forward_list<T,Allocator>::const_iterator can be dereferenced and then implicitly converted to both of them. ​

[modifier] Retourne la valeur

(Aucun)
Original:
(none)
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[modifier] Exemple

#include <iostream>
#include <forward_list>
 
std::ostream& operator<<(std::ostream& ostr, const std::forward_list<int>& list)
{
    for (auto &i : list) {
        ostr << " " << i;
    }
    return ostr;
}
 
int main()
{
    std::forward_list<int> list1 = { 5,9,0,1,3 };
    std::forward_list<int> list2 = { 8,7,2,6,4 };
 
    list1.sort();
    list2.sort();
    std::cout << "list1:  " << list1 << "\n";
    std::cout << "list2:  " << list2 << "\n";
    list1.merge(list2);
    std::cout << "merged: " << list1 << "\n";
}

Résultat :

list1:   0 1 3 5 9
list2:   2 4 6 7 8
merged:  0 1 2 3 4 5 6 7 8 9

[modifier] Complexité

à la plupart des comparaisons size() + other.size() - 1 .
Original:
at most size() + other.size() - 1 comparisons.
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[modifier] Voir aussi

déplace les éléments d'un autre forward_list
Original:
moves elements from another forward_list
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(fonction membre publique) [edit]