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std::inplace_merge

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< cpp‎ | algorithm

 
 
Biblioteca de algoritmos
Políticas de ejecución (C++17)
Operaciones no modificadoras de secuencia
(C++11)(C++11)(C++11)
(C++17)
Operaciones modificadoras de secuencia
Operaciones en almacenamiento no inicializado
Operaciones de partición
Operaciones de ordenación
(C++11)
Operaciones de búsqueda binaria
Operaciones de set (en rangos ordenados)
inplace_merge
Operaciones de pila
(C++11)
Operaciones minimo/maximo
(C++11)
(C++17)
Permutaciones
Operaciones numéricas
Bibliotecas C
 
Definido en la cabecera <algorithm>
template< class BidirIt >
void inplace_merge( BidirIt first, BidirIt middle, BidirIt last );
(1)
template< class BidirIt, class Compare>
void inplace_merge( BidirIt first, BidirIt middle, BidirIt last, Compare comp );
(2)
Combina dos cadenas consecutivas ordenados [first, middle) y [middle, last) en un rango [first, last) ordenada. El orden de los elementos iguales se garantiza que se conservan. La primera versión utiliza operator< para comparar los elementos, la segunda versión utiliza la función de comparación dado comp .
Original:
Merges two consecutive sorted ranges [first, middle) and [middle, last) into one sorted range [first, last). The order of equal elements is guaranteed to be preserved. The first version uses operator< to compare the elements, the second version uses the given comparison function comp.
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Contenido

[editar] Parámetros

first -
el comienzo de la primera gama ordenados
Original:
the beginning of the first sorted range
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middle -
el final de la primera gama ordenados y el comienzo de la segunda
Original:
the end of the first sorted range and the beginning of the second
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last -
el final de la segunda gama ordenados
Original:
the end of the second sorted range
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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 BidirIt can be dereferenced and then implicitly converted to both of them. ​

Requerimientos de tipo
-
BidirIt debe reunir los requerimientos de ValueSwappable y BidirectionalIterator.
-
The type of dereferenced BidirIt must meet the requirements of MoveAssignable and MoveConstructible.

[editar] Valor de retorno

(Ninguno)
Original:
(none)
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[editar] Complejidad

Exactamente N-1 comparaciones memoria adicional si se dispone de suficiente, de lo contrario N·log(N) donde N = std::distance(first, last) .
Original:
Exactly N-1 comparisons if enough additional memory is available, otherwise N·log(N) where N = std::distance(first, last).
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[editar] Notas

Esta función intenta asignar un búfer temporal, normalmente llamando std::get_temporary_buffer. Si la asignación falla, el algoritmo menos eficiente es elegido .
Original:
This function attempts to allocate a temporary buffer, typically by calling std::get_temporary_buffer. If the allocation fails, the less efficient algorithm is chosen.
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[editar] Ejemplo

El código siguiente es una implementación del tipo de mezcla .
Original:
The following code is an implementation of merge sort.
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#include <vector>
#include <iostream>
#include <algorithm>
 
template<class Iter>
void merge_sort(Iter first, Iter last)
{
    if (last - first > 1) {
        Iter middle = first + (last - first) / 2;
        merge_sort(first, middle);
        merge_sort(middle, last);
        std::inplace_merge(first, middle, last);
    }
}
 
int main()
{
    std::vector<int> v{8, 2, -2, 0, 11, 11, 1, 7, 3};
    merge_sort(v.begin(), v.end());
    for(auto n : v) {
        std::cout << n << ' ';
    }
    std::cout << '\n';
}

Salida:

-2 0 1 2 3 7 8 11 11

[editar] Ver también

fusiona dos rangos ordenados
Original:
merges two sorted ranges
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(plantilla de función) [editar]
Ordena un intervalo en orden ascendente
Original:
sorts a range into ascending order
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(plantilla de función) [editar]
Ordena un intervalo de elementos, mientras que la preservación del orden entre los elementos iguales
Original:
sorts a range of elements while preserving order between equal elements
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(plantilla de función) [editar]