- Example

// templateInstantiation.cpp
#include <iostream>
#include <vector>
template <typename T, int N>
class Array{
public:
  Array()= default;
  int getSize() const{
    return N;
  }
  std::vector<T> elem;
};
template<typename T>
bool isSmaller(T fir, T sec){
  return fir < sec;
}
template class std::vector<int>;
template bool std::vector<double>::empty() const;
template class Array<int, 20>;
template int Array<double, 5>::getSize() const;
template bool isSmaller(double, double);
template bool isSmaller<int>(int, int);
int main(){
  std::cout << std::endl;
  
  std::cout << std::boolalpha << "implicit" << std::endl;
  
  std::cout << std::endl;
  
  std::vector<int> vec{};
  std::cout << "vec.size(): " << vec.size() << std::endl;
  
  Array<int, 10> arr;
  std::cout << "arr.getSize(): " << arr.getSize() << std::endl;
  
  std::cout << std::endl;
  
  std::cout << "isSmaller(5, 10): " << isSmaller(5,10) << std::endl;
  
  std::cout << "isSmaller<double>(5.5, 6.5): " << isSmaller<double>(5.5, 6.5) << std::endl;
  
  std::cout << std::endl;
  
}