raw_storage_iterator::raw_storage_iterator

建構函式使用指定的基礎輸出 Iterator 的未經處理的儲存體 Iterator。

explicit raw_storage_iterator(
   ForwardIterator _First
);

參數

• _First
  正向是基礎建構之 raw_storage_iterator 物件的列舉值。

範例

// 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);
}

需求

標頭： <memory>

命名空間: std

請參閱

參考

raw_storage_iterator 類別