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std::uninitialized_fill_n

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< cpp‎ | memory

 
 
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Operadores relacionales
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Swap, forward and move
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Gestión de memoria dinámica
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Los asignadores
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Allocators
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Inicializar el almacenamiento
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Uninitialized storage
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uninitialized_fill_n
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Definido en la cabecera <memory>
template< class ForwardIt, class Size, class T >
void uninitialized_fill_n( ForwardIt first, Size count, const T& value )

Copies the given value value to the first count elements in an uninitialized memory area beginning at first. The elements in the uninitialized area are constructed using copy constructor.

Contenido

[editar] Parámetros

first - the beginning of the range of the elements to initialize
count - number of elements to construct
value -
el valor para la construcción de los elementos con
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the value to construct the elements with
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Requerimientos de tipo
-
ForwardIt debe reunir los requerimientos de ForwardIterator.

[editar] Valor de retorno

Iterator al elemento pasado el último elemento copiado .
Original:
Iterator to the element past the last element copied.
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[editar] Complejidad

Lineal en count
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Linear in count
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[editar] Posible implementación

template< class ForwardIt, class Size, class T >
void uninitialized_fill_n(ForwardIt first, Size count
                          const T& value)
{
    typedef typename std::iterator_traits<ForwardIt>::value_type Value;
    for (; count > 0; ++first, --count) {
        ::new (static_cast<void*>(&*first)) Value(value);
    }
    return first;
}

[editar] Ejemplo

[editar] Ver también

copia un objeto a una zona de memoria no inicializada
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copies an object to an uninitialized area of memory
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(plantilla de función) [editar]