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?

What are the two steps that happen while i say delete p?, A: N delete p is ...

A: N delete p is a two-step procedure: it calls the destructor, and then releases the memory. The code developed for delete p is functionally similar to this (supposing p is of typ

Boardcoloring, how to fill the blank space in4*4 matrix?

how to fill the blank space in4*4 matrix?

Advantages of using pointers over arrays, Question : (a) Define a Poin...

Question : (a) Define a Pointer. Provide an example of an integer pointer variable. (b) Give advantages of using pointers over arrays. (c) Declare an integer pointer

Explain the bit wise operators, Explain the Bit Wise Operators? C langu...

Explain the Bit Wise Operators? C language has distinction of supporting special operators recognized as bit wise operators for manipulation of data at bit level. These operato

Calculation, write a program to calculate the cuboid

write a program to calculate the cuboid

Explain the working of array with strings, Explain the working of Array wit...

Explain the working of Array with Strings? A string is defined in C language as an array of characters. A null character (‘\0') is automatically added to the end of the charact

Decode the code, c++ coding decode the letters from numbers

c++ coding decode the letters from numbers

CptS 121 Program Development & Design program design in C, Write a program...

Write a program that performs character processing on 10 characters read in from a file, and writes the results to output files. Do NOT use loops or arrays to solve this problem. N

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