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C++ using this pointer in constructors
Like the title, may I do something like the following code?
class A;
class B {
public:
B(A* p);
...
};
class A {
B m;
public:
A():m(this){}
~A(){}
};
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1. The copy constructor is used to initialize the members of a newly created object by copying the members of an already existing object. 2. Copy constructor takes a reference to an object of the same class as an argument.
A for loop is an executable control structure. In C#, you can place executable control structures within methods in a class (or in a struct), including within the class's constructor(s) and finalizer, if any.
A copy constructor has as its first parameter a (possibly const or volatile) reference to its own class type. It can have more arguments, but the rest must have default values associated with them.
Explanation: Whenever the compiler creates a temporary object, copy constructor is used to copy the values from existing object to the temporary object. Explanation: While using explicit copy constructor, the pointers of copied object point to the intended memory location.
Yes, you can passed a pointer to an object currently under construction. But you have to keep in mind, that the object isn't constructed completely yet. So basically what B can do in it's c'tor is store the pointer for later use.
An example where this is often used, is a std::stream and a stream buffer.
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