operator!= (<memory>)

 

Tests for inequality between objects.

Syntax

template<class Type, class Other>
   bool operator!=(
      const allocator<Type>& _Left,
      const allocator<Other>& _Right
   ) throw();
template<class Type1, class Del1, class Type2, class Del2>
    bool operator!=(
        const unique_ptr<Type1, Del1>& _Left,
        const unique_ptr<Type2&, Del2>& _Right
);
template<class Ty1, class Ty2>
    bool operator!=(
        const shared_ptr<Ty1>& _Left,
        const shared_ptr<Ty2>& _Right
   );

Parameters

• _Left
  One of the objects to be tested for inequality.

• _Right
  One of the objects to be tested for inequality.

• Ty1
  The type controlled by the left shared pointer.

• Ty2
  The type controlled by the right shared pointer.

Return Value

true if the objects are not equal; false if objects are equal.

Remarks

The first template operator returns false. (All default allocators are equal.)

The second and third template operators return !(_Left == _Right).

Example

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

using namespace std;

int main( ) 
{
   allocator<double> Alloc;
   vector <char>:: allocator_type v1Alloc;

   if ( Alloc != v1Alloc )
      cout << "The allocator objects Alloc & v1Alloc not are equal."
           << endl;
   else
      cout << "The allocator objects Alloc & v1Alloc are equal."
           << endl;
}

The allocator objects Alloc & v1Alloc are equal.

Example

 

// std_tr1__memory__operator_ne.cpp 
// compile with: /EHsc 
#include <memory> 
#include <iostream> 

int main() 
    { 
    std::shared_ptr<int> sp0(new int(0)); 
    std::shared_ptr<int> sp1(new int(0)); 

    std::cout << "sp0 != sp0 == " << std::boolalpha 
        << (sp0 != sp0) << std::endl; 
    std::cout << "sp0 != sp1 == " << std::boolalpha 
        << (sp0 != sp1) << std::endl; 

    return (0); 
    } 

sp0 != sp0 == false
sp0 != sp1 == true

Requirements

Header: <memory>

Namespace: std

See Also

auto_ptr Class
shared_ptr Class
shared_ptr::operator!=
unique_ptr Class