allocator::max_size

Devuelve el número de elementos de Tipo tipo que se podrían asignar mediante un objeto del asignador de clase antes de que la memoria libre se utilice hacia arriba.

size_type max_size( ) const;

Valor devuelto

El número de elementos que pueden asignarse.

Ejemplo

// allocator_max_size.cpp
// compile with: /EHsc
#include <memory>
#include <iostream>
#include <vector>

using namespace std;

int main( ) 
{
   vector <int> v1;
   vector <int>::iterator v1Iter;
   vector <int>:: allocator_type v1Alloc;

   int i;
   for ( i = 1 ; i <= 7 ; i++ )
   {
      v1.push_back( i );
   }

   cout << "The original vector v1 is:\n ( " ;
   for ( v1Iter = v1.begin( ) ; v1Iter != v1.end( ) ; v1Iter++ )
      cout << *v1Iter << " ";
   cout << ")." << endl;

   vector <double> v2;
   vector <double> ::iterator v2Iter;
   vector <double> :: allocator_type v2Alloc;
   allocator<int>::size_type v1size;
   v1size = v1Alloc.max_size( );

   cout << "The number of integers that can be allocated before\n"
        << " the free memory in the vector v1 is used up is: "
        << v1size << "." << endl;

   int ii;
   for ( ii = 1 ; ii <= 7 ; ii++ )
   {
      v2.push_back( ii * 10.0 );
   }

   cout << "The original vector v2 is:\n ( " ;
   for ( v2Iter = v2.begin( ) ; v2Iter != v2.end( ) ; v2Iter++ )
      cout << *v2Iter << " ";
   cout << ")." << endl;
   allocator<double>::size_type v2size;
   v2size = v2Alloc.max_size( );

   cout << "The number of doubles that can be allocated before\n"
        << " the free memory in the vector v2 is used up is: "
        << v2size << "." << endl;
}

Resultados del ejemplo

El siguiente resultado corresponde a x86.

The original vector v1 is:
 ( 1 2 3 4 5 6 7 ).
The number of integers that can be allocated before
 the free memory in the vector v1 is used up is: 1073741823.
The original vector v2 is:
 ( 10 20 30 40 50 60 70 ).
The number of doubles that can be allocated before
 the free memory in the vector v2 is used up is: 536870911.

Requisitos

Encabezado: <memory>

Espacio de nombres: std

Vea también

Referencia

allocator (Clase)