Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
reference_wrapper in C++
In C++ the reference_wrapper is a class template that helps by wrapping a reference in a copy constructible and copy assignable object of type T. The instances of std::reference_wrapper are basically objects, but they can be converted into T&. So we can use as argument with the functions that take the underlying type by reference.
Example Code
#include <iostream>
#include <functional>
using namespace std;
int main () {
char a = 'h', b = 'e', c = 'l', d = 'l', e = 'o' , f = 'W', g = 'o', h = 'r', i = 'l', j = 'd';
reference_wrapper<char> ref[] = {a, b, c, d, e, f, g, h, i, j}; //creating reference array
for (char& s : ref)
cout << s;
cout <<endl;
return 0;
}Output
soumyadeep@soumyadeep-VirtualBox:~$ ./a.out helloWorld soumyadeep@soumyadeep-VirtualBox:~$
Updated on: 30-Jul-2019
202 Views
Advertisements