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?

Board coloring, color representation 0,1,2,3,4,5,6,7...

color representation 0,1,2,3,4,5,6,7...

I want to change c++ code to python extension, I want to change C++ code to...

I want to change C++ code to Python extension Project Description: I have the C++ source code for an executable that takes a path to an image file as the input and prints tex

Stack operations - c++, Stack operations - C++: Write a program to def...

Stack operations - C++: Write a program to define basic stack operations in c++. int Stack::push(int elem) {    int m = getmax();    if (top    {       put_

Define name mangling in c++??, A: The procedure of encoding the parameter t...

A: The procedure of encoding the parameter types along with the function/method name into a unique name is called as name mangling. The inverse procedure is called demangling. F

What happens while a function throws an exception which , Q-What happens wh...

Q-What happens while a function throws an exception which was not specified through an exception specification for this function? A: Unexpected() is called, which, by default, w

Super ASCII String Cost, A string S is said to be "Super ASCII", if it cont...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

Operations on strings, 1 Aims The main purpose of the assignment is to ...

1 Aims The main purpose of the assignment is to let you practice the following programming techniques: perform operations on pointers to basic and more complex types;

#include, Write a program to find the area under the curve y = f(x) between...

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 between two points can b

How can one "reopen" std::cin & std::cout in binary mode?, A: It is impleme...

A: It is implementation dependent. Verify with your compiler's documentation. For instance, assume you wish to do binary I/O using std::cin & std::cout. Unluckily there is no st

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