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?

Want a scraping program created, Want a scraping program created Project...

Want a scraping program created Project Description: We need to hire a professional developer to scrape the site for information such as *product title *Product Price

Write a constructor for a movie, Suppose we use Lists to represent a movie ...

Suppose we use Lists to represent a movie which has a title, cast and year. For example, the following list represents the movie, "Die Hardly", with the cast "Bruce Willing" and "T

Functions, write a program to calculate gross salary and net salary using h...

write a program to calculate gross salary and net salary using hra da pf in c++

C program for pattern star, 1 PETTERN1 (Pettern1.c)   main() { ...

1 PETTERN1 (Pettern1.c)   main() {           int i,j,k=1,a;           clrscr();           for(i=1;i           {                    if(i>=3)

Program for design and simulate a basic risc processor, Overall Program Obj...

Overall Program Objective: You will design and simulate a basic RISC processor.   You will create and encode an instruction set.  Your final task will be to "compile" a program

Client-server architecture Project, I need a client-server architecture pro...

I need a client-server architecture program for windows OS (minimum support: Win 7),. the agent program will run as a background process and perform certain tasks every X time, and

Wap in c to find determinant of matrix order 3x3 , Normal 0 fal...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Operator precedence and associatively, Op e r a t o r P r e c e d ...

Op e r a t o r P r e c e d e n c e a n d A s s o c i a t i v e l y : T h e op e r a t o r p r e c e d e n c e a n d i

Program for basically a small store, ¦It should ask customers to enter deta...

¦It should ask customers to enter details such as their names and addresses. ¦It should print a welcome message that includes the customer’s name. ¦It should provide a list of avai

C program to demonstrate pointer to string, C program to demonstrate Pointe...

C program to demonstrate Pointer to string: void main() {                 int a;                 char str[]="hello how are you?",*ptr_str;                 ptr_str=&

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