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Embedded Programming with Modern C++

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Explore how to apply type traits such as add_const, remove_const, and is_const to modify and check const qualifiers in C++. Understand their role in writing high-performance embedded programs. This lesson focuses on practical usage and verification of const correctness using standard library tools, preparing you for advanced constant expression techniques.

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Solution

C++
// typeModifications.cpp
#include <iostream>
#include <type_traits>
int main(){
  std::cout << std::boolalpha << std::endl;
  std::cout << "std::is_const<std::add_const<int>::type>::value: " <<  std::is_const<std::add_const<int>::type>::value << std::endl;
  std::cout << "std::is_const<std::remove_const<const int>::type>::value: " << std::is_const<std::remove_const<const int>::type>::value << std::endl;
  std::cout << std::endl;
  typedef std::add_const<int>::type myConstInt;
  std::cout << "std::is_const<myConstInt>::value: " << std::is_const<myConstInt>::value << std::endl;
  typedef const int myConstInt2;
  std::cout << "std::is_same<myConstInt, myConstInt2>::value: " << std::is_same<myConstInt, myConstInt2>::value << std::endl;
  std::cout << std::endl;
}

Explanation

  • In line 7, due to the flag boolalpha in line 10, the program displays either true or false instead of 1 or 0.

  • In line 9, we used ...