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raw_storage_iterator::raw_storage_iterator

Constructs a raw storage iterator with a specified underlying output iterator.

explicit raw_storage_iterator(
   ForwardIterator _First
);

Parameters

  • _First
    The forward iterator that is to underlie the raw_storage_iterator object being constructed.

Example

// raw_storage_iterator_ctor.cpp
// compile with: /EHsc /W3
#include <iostream>
#include <iterator>
#include <memory>
#include <list>
using namespace std;

class Int
{
public:
   Int(int i)
   {
      cout << "Constructing " << i << endl;
      x = i;
      bIsConstructed = true;
   };
   Int &operator=( int i )
   {
      if (!bIsConstructed)
         cout << "Error! I'm not constructed!\n";
      cout << "Copying " << i << endl;  x = i; return *this;
   };
   int x;
   bool bIsConstructed;
};

int main( void )
{
   std::list<int> l;
   l.push_back( 1 );
   l.push_back( 2 );
   l.push_back( 3 );
   l.push_back( 4 );

   Int *pInt = (Int*)malloc(sizeof(Int)*l.size( ));
   memset (pInt, 0, sizeof(Int)*l.size( ));
   // Hack: make sure bIsConstructed is false

   std::copy( l.begin( ), l.end( ), pInt );  // C4996
   for (unsigned int i = 0; i < l.size( ); i++)
      cout << "array " << i << " = " << pInt[i].x << endl;;

   memset (pInt, 0, sizeof(Int)*l.size( ));
   // hack: make sure bIsConstructed is false

   std::copy( l.begin( ), l.end( ),
      std::raw_storage_iterator<Int*,Int>(pInt));  // C4996
   for (unsigned int i = 0; i < l.size( ); i++ )
      cout << "array " << i << " = " << pInt[i].x << endl;

   free(pInt);
}
Error! I'm not constructed!
Copying 1
Error! I'm not constructed!
Copying 2
Error! I'm not constructed!
Copying 3
Error! I'm not constructed!
Copying 4
array 0 = 1
array 1 = 2
array 2 = 3
array 3 = 4
Constructing 1
Constructing 2
Constructing 3
Constructing 4
array 0 = 1
array 1 = 2
array 2 = 3
array 3 = 4

Requirements

Header: <memory>

Namespace: std

See Also

Reference

raw_storage_iterator Class