Described smart pointer?, C/C++ Programming

Assignment Help:

A: A smart pointer is a C++ class which mimics a regular pointer in syntax and some semantics, however it does more. Since smart pointers to distinct types of objects tend to have a lot of code in common, approximately all good-quality smart pointers in existence are templated trhough the pointee type, as you can notice in the following code:

template

class SmartPtr

{

public:

explicit SmartPtr(T* pointee) : pointee_(pointee); SmartPtr& operator=(const SmartPtr& other);

~SmartPtr();

T& operator*() const

{

...

return *pointee_;

}

T* operator->() const

{

...

return pointee_;

}

private:

T* pointee_;

...

};

SmartPtr aggregates a particular pointer to T in its member variable pointee_. Most smart pointers do this. In some of the cases, a smart pointer may aggregate some handles to data and compute the pointer on the fly.

The two operators give SmartPtr pointer-like semantics and syntax. i.e., you can write

class Widget

{

public:

void Fun();

};

SmartPtr sp(new Widget);

sp->Fun(); (*sp).Fun();

Sideways from the definition of sp, nothing reveals it since not being a pointer. It is the mantra of smart pointers: You can replace pointer definitions along with smart pointer definitions without incurring major changes to your application's code. Thus you get extra goodies along with ease. Minimizing code changes is extremely appealing and essential for getting large applications to employ smart pointers. However, smart pointers are not a free lunch.


Related Discussions:- Described smart pointer?

Explain reference types, Reference Types The symbol "&" is interpreted ...

Reference Types The symbol "&" is interpreted as an address operator as well as AND operator. This operator is also used to declare a "reference variable". A reference is refer

Guidelines or "rules of thumb" for overloading operators?, What are some gu...

What are some guidelines / "rules of thumb" for overloading operators? A: Here are a few guidelines / rules of thumb .Use common sense. If your overloaded operator makes life si

Derivatives and symbolic math, #Hi, I''m planning to derive the escape velo...

#Hi, I''m planning to derive the escape velocity through C++. I would just like to know if it''s possible to differentiate symbolic functions? Do I need to download libraries,etc?

Car rental project, I need a project on car rental system using c programmi...

I need a project on car rental system using c programming only of college level

Pattern, enter height of the shape: 1 3 5 3 1 3 5 7 5 3 5 7 9 7 5 3 5 7...

enter height of the shape: 1 3 5 3 1 3 5 7 5 3 5 7 9 7 5 3 5 7 5 3 1 3 5 3 1

Where are longjmp and setjmp used in c++, Where are longjmp and setjmp used...

Where are longjmp and setjmp used in C++? -Setjmp and longjmp must not be used in C++. - Longjmp jumps out of the function without unwinding stack. This means that local obj

Program to calculate average of marks, Program for calculate average of tot...

Program for calculate average of total marks: #include using namespace std; void print(int marks_arr[],int cnt) { int ind[cnt]; int i=0; int j=0; int k=0;

Explain variables, Variables Information stored in a variable can alter...

Variables Information stored in a variable can alter in the course of the program. The type used in the definition explains the kind of information the symbol can store. Variab

Describe the oops concept - class, There are so many different concepts rel...

There are so many different concepts related with OOP (Object-oriented programming) such as: Class Object Inheritance Polymorphism Abstraction Encapsulation

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd