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?

Miniumshelf, write a prgm to find minimum total number of shelves including...

write a prgm to find minimum total number of shelves including the intial one required for loading process

Buffer overflow, Can you help me with a C++ project?

Can you help me with a C++ project?

Luminous and jewels, Byteland county is very famous for luminous jewels. Lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Menus, create a shopping cart in c++

create a shopping cart in c++

Algorithm, Algorithm for railway ticket booking process

Algorithm for railway ticket booking process

Write in a file - c program, Write in a file: void main() { int ...

Write in a file: void main() { int i,j,k,l,list[1000]; FILE *fp; char any[8];   cout cin >> any;   fp = fopen(any,"wb");     for(j=0;j     {

Loops, how many types of loops are there and whay are they and what are its...

how many types of loops are there and whay are they and what are its uses

Explain the declaration of multi dimensional arrays, Explain the Declaratio...

Explain the Declaration of Multi Dimensional Arrays? In the figure, the range in the first dimension is 3 and in the second dimension is 4. The shaded portion corresponds to th

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