Described smart pointer?, C/C++ Programming

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:


class SmartPtr



explicit SmartPtr(T* pointee) : pointee_(pointee); SmartPtr& operator=(const SmartPtr& other);


T& operator*() const



return *pointee_;


T* operator->() const



return pointee_;



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



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.

Posted Date: 3/19/2013 9:01:12 AM | Location : United States

Related Discussions:- Described smart pointer?, Assignment Help, Ask Question on Described smart pointer?, Get Answer, Expert's Help, Described smart pointer? Discussions

Write discussion on Described smart pointer?
Your posts are moderated
Related Questions
Compiler Design - Limit In The Method Instructions

C Program to FIND VOWELS   void main() {           char str[50];           int ac=0, ec=0, ic=0, oc=0, uc=0;           int i,stln,vc,word=1;           clrscr


PROGRAM TO FIND WHETHER A NUMBER IS ODD OR EVEN int main() { int number ; printf("Enter a whole number\n"); scanf("%d",&number); if(number % 2 == 0) printf("n

how to make program c++

code for solving optimal solution for matrix

Templates permit to create generic functions that admit any data type as parameters and return value without having to overload the function with all the possible data types. Until

Write a function that has four unsigned char parameters, combines the four one-byte integer values into an unsigned integer, and returns the unsigned integer. When the four one

Implement a menu driven real estate catalogue system that allows users to perform various catalogue maintenance and search tasks.  You are only allowed to use the C programming la

i have an array of structs, and am trying to make a pointer that can point to a certain struct within the array