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 some features of external storage class in c program, Define some fe...

Define some features of external storage class in c program? The features of an external storage class variable are as follows: Storage - memory Default initial value -

Why shouldn''t matrix class''s interface look like an array, Why shouldn't ...

Why shouldn't Matrix class's interface look like an array-of-array? A: Some people build a Matrix class that has an operator[] that returns a reference to an Array object (or po

Area under curve, write a program to find the area under curve y=f(x) betwe...

write a program to find the area under curve y=f(x) between x=a and x=b,integrate y=f(x) between the limits a and b

Application to maintain soccer team information, Write a C program "team.c"...

Write a C program "team.c" that maintains information for a soccer team. The program will allow you to add and delete players from your team, to search your team for players by nam

Flow chart, how made a flow chart of prime number by using for loop

how made a flow chart of prime number by using for loop

Explain the functions strlen ( ), Question 1 Consider you have to find out...

Question 1 Consider you have to find out average marks of 100 students in a class. Write simple program(s) using different iteration statements to accomplish it Question 2 Expla

I want skype recorder application, I want Skype Recorder Application + Setu...

I want Skype Recorder Application + Setup + Sourcecode + NICE UI Project Description: i want an application built which will allow user to record skype audio or video calls

What should one catch?, A: By keeping along with the C++ tradition of "ther...

A: By keeping along with the C++ tradition of "there's more than one method to do that" (translation: "give programmers options & tradeoffs so they can choose what's best for them

Make c code works equally on 64 and 32 bit, Project Description: I have ...

Project Description: I have a code that works different on 64 bit and 32 bit system. Code is relative to some crypt functions, similar, but not equal to: I have to move fr

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