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std::list::merge

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< cpp‎ | container‎ | list

 
 
 
std::list
Member-Funktionen
Original:
Member functions
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list::list
list::~list
list::operator=
list::assign
list::get_allocator
Elementzugriff zerstört
Original:
Element access
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list::front
list::back
Iteratoren
Original:
Iterators
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list::begin
list::cbegin

(C++11)
list::end
list::cend

(C++11)
list::rbegin
list::crbegin

(C++11)
list::rend
list::crend

(C++11)
Kapazität
Original:
Capacity
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list::empty
list::size
list::max_size
Modifiers
Original:
Modifiers
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list::clear
list::insert
list::emplace(C++11)
list::erase
list::push_front
list::emplace_front(C++11)
list::pop_front
list::push_back
list::emplace_back(C++11)
list::pop_back
list::resize
list::swap
Operations
Original:
Operations
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list::merge
list::splice
list::remove
list::remove_if
list::reverse
list::unique
list::sort
 
void merge( list& other );
(1)
void merge( list&& other );
(1) (seit C++11)
template <class Compare>
void merge( list& other, Compare comp );
(2)
template <class Compare>
void merge( list&& other, Compare comp );
(2) (seit C++11)
Führt zwei sortierte Listen in einem. Die Listen sollten in aufsteigender Reihenfolge sortiert werden .
Original:
Merges two sorted lists into one. The lists should be sorted into ascending order.
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Keine Elemente kopiert werden. Der Behälter other leer nach der Operation. Die Funktion tut nichts, wenn this == &other. Wenn get_allocator() != other.get_allocator(), ist das Verhalten undefiniert. Keine Iteratoren oder Referenzen geworden ungültig, außer dass die Iteratoren der bewegten Elemente nun in *this beziehen, nicht in other. Die erste Version verwendet operator< um die Elemente zu vergleichen, verwendet die zweite Version des gegebenen Vergleichsfunktion 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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Inhaltsverzeichnis

[Bearbeiten] Parameter

other -
ein weiterer Behälter zu verschmelzen
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 list<T,Allocator>::const_iterator can be dereferenced and then implicitly converted to both of them. ​

[Bearbeiten] Rückgabewert

(None)
Original:
(none)
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[Bearbeiten] Beispiel

#include <iostream>
#include <list>
 
std::ostream& operator<<(std::ostream& ostr, const std::list<int>& list)
{
    for (auto &i : list) {
        ostr << " " << i;
    }
    return ostr;
}
 
int main()
{
    std::list<int> list1 = { 5,9,0,1,3 };
    std::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

[Bearbeiten] Komplexität

höchstens size() + other.size() - 1 Vergleiche .
Original:
at most size() + other.size() - 1 comparisons.
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[Bearbeiten] Siehe auch

Elemente aus einem anderen bewegt list
Original:
moves elements from another list
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(öffentliche Elementfunktion) [edit]