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?

Define the category of function - computer programming, Define the Category...

Define the Category of Function? A function, depending on whether arguments or parameters are present or not and whether a value returned or not, may belong to one of the foll

Employee payroll, You are to write a C++ program which will compute the gro...

You are to write a C++ program which will compute the gross pay, Social Security Tax, Income Tax and net pay for an employee. The program needs to prompt for and read the employ

Program that allows a restaurant employee to enter an order, The Malt Shop ...

The Malt Shop restaurant charges $2.99 for burgers, $1.29 for fries, and $1.25 for sodas.  Write a program that allows a restaurant employee to enter an order (the number of bur

Write a program that finds the minimum total number of shelv, Write a progr...

Write a program that finds the minimum total number of shelves, including the initial one required for this loading process.

Using substitution model write corresponding constructor, (a) Pairs may be ...

(a) Pairs may be represented using a lambda. Using only lambdas, create a procedure (triple x y z) that constructs a triplet. You may NOT use car, cons or cdr in the triplet proced

Vb.net, write a program that would accept the radius of the sphere and retu...

write a program that would accept the radius of the sphere and return its surface area.

Computer, Is computer an intelligent machine?

Is computer an intelligent machine?

C program to print fibonacci series, C program to print fibonacci series: ...

C program to print fibonacci series: int fibo(long int); void main() {                 long int a=0,n;                 printf ("how many terms\n");

Stone game, how to write a c program for stone game

how to write a c program for stone game

I need vsti program, I need vsti program Project Description: Knowled...

I need vsti program Project Description: Knowledge of vsti programs, and music is a plus, ex: nexus I will input the sounds I just need the interface built Skills required

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