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?

Can copy constructor admit an object of the same class , Can copy construct...

Can copy constructor admit an object of the same class as parameter, rather than reference of the object?

File processing, Write a C++ program doing the following: The program reads...

Write a C++ program doing the following: The program reads from the keyboard the numbers of rows and columns of a 2-D array of integers. Then, it allocates this array (let’s name i

List, Is there any difference between List x; and List x ()? Can you please...

Is there any difference between List x; and List x ()? Can you please provide me assignment help.

201 it, overload assignment opertor to assign the data of one object to ant...

overload assignment opertor to assign the data of one object to anthor

Write a program to illustrate array of structures, Write a program to illus...

Write a program to illustrate array of structures? struct customer { int id; char name[15]; }; struct customer c[100]; . In the above instance, the array of Structures is

Class and object, write a class player that contain attributes for the play...

write a class player that contain attributes for the player,s name,average and team

There are ''''n'''' ants on a ''''n+1'''' leng n, There are ''''n'''' ants ...

There are ''''n'''' ants on a ''''n+1'''' length rod. The ants are numbered from 1 to n and are initially placed at positions starting from position 1 till position n. They are mov

Hotel booking, Construct a console program to manage the booking of a Hotel...

Construct a console program to manage the booking of a Hotel room.

#title. RETIRED ON SOCIAL SECURITY., IS IT POSSIBLE FOR YOU TO WRITE A PR...

IS IT POSSIBLE FOR YOU TO WRITE A PROGRAM FOR ME TO MEASURE EXISTING ANGLES AND DO IF AND THEN FROM THIS , AND TO PLACE FIXED ANGLES AT CERTAIN POSITION AS A ADD WITH DLL FOR CERTA

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