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?

Add the two complex no.s given by user - c++ program, THIS PROGRAM IS TO AD...

THIS PROGRAM IS TO ADD THE TWO COMPLEX NO.S GIVEN BY THE USER  */ #include #include #include struct complex     {     int real;     int imag;     }; void main()  {  clrs

File, how i can open a file

how i can open a file

Define four facilities provided by c language preprocessor, Define Four Fac...

Define Four Facilities Provided by C Language Preprocessor? The C language preprocessor provides four separate facilities that you can use as you see fit:   Inclusion

C program for reverse the string , C Program for REVERSE THE STRING #i...

C Program for REVERSE THE STRING #include stdio.h> #include conio.h> #include string.h> void main() {           char name[30];           char *s;

Area under the curve, Area under the curve Write a program to find the area...

Area under the curve 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 bet

Define generic bitwise operations, Define Generic Bitwise Operations? ...

Define Generic Bitwise Operations? Bitwise operators only work on an incomplete number of types int and char. It turns out there's above one kind of int. In particular there's

Standard input- output using motorola and intel devices, Talking to IO boar...

Talking to IO boards inside a computer or microcontroller depends upon the principles used by the microprocessor to address physical devices. On Motorola systems all devices connec

TCP, check this link: http://cactus.eas.asu.edu/partha/Teaching/430.2013/...

check this link: http://cactus.eas.asu.edu/partha/Teaching/430.2013/Project/proj-2.2013.htm

Algorithem, algorithem of compound interest

algorithem of compound interest

Class and object, how to write c++ code for financial system using class an...

how to write c++ code for financial system using class and object

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