raw_storage_iterator::operator=
Assignment operator used to implement the raw storage iterator expression *i = x for storing in memory.
raw_storage_iterator<ForwardIterator, Type>& operator=(
const Type& _Val
);
Parameters
- _Val
The value of the object of type Type to be inserted into memory.
Return Value
The operator inserts _Val into memory, and then returns a reference to the raw storage iterator.
Remarks
The requirements for a ForwardIterator state that the raw storage iterator must satisfy require only the expression *ii = t be valid, and that it says nothing about the operator or the operator= on their own. These member operators return *this.
The assignment operator constructs the next object in the output sequence using the stored iterator value first, by evaluating the placement new expression new ( (void *)&*first) Type(_Val).
Example
// raw_storage_iterator_op_assign.cpp
// compile with: /EHsc
#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 << "Not constructed.\n";
cout << "Copying " << i << endl; x = i;
return *this;
};
int x;
private:
bool bIsConstructed;
};
int main( void )
{
Int *pInt = ( Int* )malloc( sizeof( Int ) );
memset( pInt, 0, sizeof( Int ) ); // Set bIsConstructed to false;
*pInt = 5;
raw_storage_iterator<Int*, Int> it( pInt );
*it = 5;
}
Not constructed.
Copying 5
Constructing 5
Requirements
Header: <memory>
Namespace: std