Operators - Page 3

Operators new and delete can be declared in a class scope. However, the Standard prohibits declarations of these operators in a namespace. Why is this? Consider the following example: ...

The following restrictions apply to operator overloading: ...

You can use both -- and ++ as prefix and postfix operators. When applied to primitives such as int or char, they are indistinguishable in terms of efficiency. When applied to objects, on the other ...

As opposed to base class' constructor and destructor, which are automatically invoked from the derived class' constructor and destructor respectively, a user-defined assignment operator defined in a ...

Whenever your class contains pointers, references, or handles, you need to define a copy constructor and assignment operator. Otherwise, the compiler-generated copy constructor and assignment ...

Whenever you overload operators such as + or -, it is useful to support the corresponding += and -= as well. As opposed to a common belief, the compiler will not do that for you ...

Unlike ordinary base class member functions, assignment operator is not inherited. It may be re-defined by the implementer of the derived class or else it is automatically synthesized by the ...

For primitive types the C++ language distinguishes between ++x; and x++; as well as between --x; and ...

You have written a test program for your class X, and ...

The STL vector<>, as well as other standard containers, support comparison and sorting of their members by calling the corresponding standard functions found in the <algorithm> header ...

Assigning an object to itself is disastrous, so whenever you have to define a copy constructor and assignment operator, make sure your code is guarded from such a ...

When overloading an operator to support a user-defined type (object), it is best to adhere to the basic semantics of that built-in operator. For instance, the built-in operator ==, which does not ...

Sometimes, an object must be converted into a built-in type (for instance, a string object passed as an argument to C function).

If you do not define a copy constructor and operator = , the compiler will create them automatically for you. However, there are cases when you have to define them explicitly. In such ...

For a reference counted implementation, how is the operator+= member function coded? The function receives (const String & rhs) and returns String &. The returned String &String &

Which arguments do you receive when you overload . and -> , and what do you do with the arguments? I know that for overloading [] you receive the index. How about . and -> ?

How does one overload operator->*()?

This is legal (safe) and works with the compiler environment I am using: CMyObject *ptr = NULL; delete ptr; However, I get a run-time error (assert) when I use the array delete operator: long *array = NULL; delete [] array; Is the environment right or is it legal C++ to use array delete on a NULL pointer?

How can I call the operator= of the base class from the operator= in the derived class? The data member in the base class is a private data member. I want to be able to use operator = in the derived class and call the operator = in the base class

How do I send the output of my program to the standardprinter installed in Win95 or NT? Is it possible using the