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?

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

Create a program of several prototypes for functions, In this assignment th...

In this assignment the main has been written for you in the file phone_book_main.cpp. You will also notice that a class called Person has been declared as having several prototypes

C prg, main() { int a[5]={1,3,6,7,0}; int *b; b=&a[2]; } The value of b[-1]...

main() { int a[5]={1,3,6,7,0}; int *b; b=&a[2]; } The value of b[-1] is

Program, Write a ‘C’ program to accept any 3 digit integer number from the ...

Write a ‘C’ program to accept any 3 digit integer number from the keyboard and display the word equivalent representation of the given number.

AlgorithmS, Algorithm to find the value of the powers raised by integer

Algorithm to find the value of the powers raised by integer

Arrays within a class, A r r a y s w i t h i n a c l a s s:...

A r r a y s w i t h i n a c l a s s: I t i s j u s t d ecl a r i n g o r c on s t ru c ti n g a d e r i v e d t

I need profile and optimize a c++ library for speed, I need Profile and opt...

I need Profile and optimize a C++ library for speed Project Description: Optimize and profile an existing C++ library for speed. This library uses OpenMP and OpenCV and C+

C++ Program Please see where i do mistake, #include #include #include ...

#include #include #include #include #include class Employee { private: char *Name; //Set them as pointers... int IdNumber; char *Department; char *Position; public: voi

write a scheme procedure to evaluate expression, (a) Write a Scheme proced...

(a) Write a Scheme procedure to evaluate the expression: 7/6+2*5+(3*2+6*7)*4. (b) Write a Scheme procedure to evaluate the expression: 2*(-1+(-3+4*2-7)*3/(3*2)).

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