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Embedded Programming with Modern C++

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Explore how to use perfect forwarding in modern C++ to efficiently handle constructor arguments and improve resource management. Understand how this technique allows flexible and optimized object creation with varying numbers and types of arguments, setting the foundation for better memory management in embedded systems.

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Solution

C++
// perfectForwarding.cpp
#include <string>
#include <utility>
#include <initializer_list>
#include <vector>
#include <iostream>
template <typename T, typename ... Arg>
T createT(Arg&& ... arg){
  return T(std::forward<Arg>(arg) ... );
}
int main(){
  int lValue= createT<int>(1);
  int i= createT<int>(lValue);
  std::cout << "lvalue = " << lValue;
  std::cout<< " " <<std::endl;
  std::cout << "i = " << i;
  std::cout<< " " <<std::endl;
  std::string s= createT<std::string>("Only for testing purpose.");
  std::cout << s;
  std::cout<< " " <<std::endl;
  typedef std::vector<int> IntVec;
  IntVec intVec= createT<IntVec>(std::initializer_list<int>({1, 2, 3, 4, 5}));
    for (auto i = intVec.begin(); i != intVec.end(); ++i) 
    std::cout << *i << " ";
}

Explanation

  • The three dots in ...