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C++ Fundamentals for Professionals

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Understand how to define and use C++ class templates that accept different non-type parameters such as characters, references, functions, and nullptrs. This lesson helps you verify template types and prepares you for deeper exploration of template arguments and specialization techniques.

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Solution Review #

C++
#include <cstddef>
#include <iostream>
#include <typeinfo>
template <char c>
class AcceptChar{
public:
  AcceptChar(){
    std::cout << "AcceptChar: "  << typeid(c).name() << std::endl;
  }
};
template < int(*func)(int) >
class AcceptFunction{
public:
  AcceptFunction(){
    std::cout << "AcceptFunction: "  << typeid(func).name() << std::endl;
  }
};
template < int(&arr)[5] >
class AcceptReference{
public:
  AcceptReference(){
    std::cout << "AcceptReference: " << typeid(arr).name() << std::endl;
  }
};
template < std::nullptr_t N >
class AcceptNullptr{
public:
  AcceptNullptr(){
    std::cout << "AcceptNullpt: " << typeid(N).name() << std::endl;
  }
};
int myFunc(int){ return 2011; };
int arr[5];
int main(){
  std::cout << std::endl;
  AcceptChar<'c'> acceptChar;
  AcceptFunction< myFunc> acceptFunction;
  AcceptReference< arr > acceptReference;
  AcceptNullptr< nullptr > acceptNullptr;
  std::cout << std::endl;
}

Explanation

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