Namespace
Varianti

std::forward_list::merge

Da cppreference.com.

 
 
 
std::forward_list
Membri funzioni
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
Elemento accesso
Original:
Element access
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forward_list::front
Iteratori
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
Capacità
Original:
Capacity
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forward_list::empty
forward_list::max_size
Modificatori
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
Operazioni
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) (dal C++11)
void merge( forward_list&& other );
(1) (dal C++11)
template <class Compare>
void merge( forward_list& other, Compare comp );
(2) (dal C++11)
template <class Compare>
void merge( forward_list&& other, Compare comp );
(2) (dal C++11)
Unisce due liste ordinate in una sola. Le liste devono essere ordinati in ordine crescente.
Original:
Merges two sorted lists into one. The lists should be sorted into ascending order.
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Non ci sono elementi vengono copiati. Il other contenitore si svuota dopo l'operazione. La funzione non fa nulla se this == &other. Se get_allocator() != other.get_allocator(), il comportamento è indefinito. Non iteratori o riferimenti diventano invalidata, tranne che gli iteratori di elementi spostati ora si riferiscono in *this, non in other. La prima versione utilizza operator< di confrontare gli elementi, la seconda versione utilizza la funzione di confronto dato 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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Indice

[modifica] Parametri

other -
un altro contenitore per unire
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. ​

[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Esempio

#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";
}

Output:

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

[modifica] Complessità

a confronto la maggior parte size() + other.size() - 1.
Original:
at most size() + other.size() - 1 comparisons.
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[modifica] Vedi anche

sposta gli elementi da un altro forward_list
Original:
moves elements from another forward_list
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(membro pubblico funzione) [edit]