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?

Areaundercurve.c, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve betw   Solution:

Friend function in c++, Friend function in c++: class miles; class ...

Friend function in c++: class miles; class km  {    float value;    public :   // void input();     km convert(km  ,int a ) ;    void output()    {

Data structure and algorithm, implement two stacks in one array A[1...n] in...

implement two stacks in one array A[1...n] in such a way that neither stack overflows unless the total number of elements in both stacks together is n. For this you need to produce

Can i drop the [] while deleteing array of some built-in , Can I drop the [...

Can I drop the [] while deleteing array of some built-in type (char, int, etc)? A: No. you can't Sometimes programmers think that the [] in the delete[] p only present so the

B tree, real time application of b tree

real time application of b tree

Decode, Problem Description Smugglers are becoming very smart day by day. N...

Problem Description Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new techn

Accessibility, What are the legal requirements with which websites must com...

What are the legal requirements with which websites must comply in order to meet the needs of persons with disabilities? Why is maximizing accessibility important to everyone?

Program is to read the characters from keyboard, Program is to read the cha...

Program is to read the characters from keyboard: Program is to read the characters from keyboard one by one stored in different files as upper constants, lower constants, othe

Create a program to word count, Create a program WordCount1Main.java doing ...

Create a program WordCount1Main.java doing the following:  For each word in the le word.txt { Create an object of the class Word { Add the object to a set of the type java.uti

Explain about the integer constants in c language, Explain about the Intege...

Explain about the Integer constants in c language? An integer constant is the integer valued number and it refers to a sequence of digits. A decimal integer constant includes o

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