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Embedded Programming with Modern C++

- Examples

Discover practical examples demonstrating high-performance C++ techniques such as type identification with typeid, class templates accepting various non-types, and template-based matrix storage using standard containers. This lesson helps you understand how to leverage templates and type traits in embedded programming, enhancing resource management and execution speed.

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Example 1

C++
// templateTypeParameter.cpp
#include <iostream>
#include <typeinfo>
class Account{
public:
  explicit Account(double amt): balance(amt){}
private:
  double balance;
};
union WithString{
  std::string s;
  int i;
  WithString():s("hello"){}
  ~WithString(){}
};
template <typename T>
class ClassTemplate{
public:
  ClassTemplate(){
    std::cout << "typeid(T).name(): "  << typeid(T).name() << std::endl;
  }
};
int main(){
  std::cout << std::endl;
  ClassTemplate<int> clTempInt;
  ClassTemplate<double> clTempDouble;
  ClassTemplate<std::string> clTempString;
  ClassTemplate<Account> clTempAccount;
  ClassTemplate<WithString> clTempWithString;
  std::cout << std::endl;
}

Explanation

  • In the above code, we identify the different data types that we have passed in the parameter list.

  • We identify the type of variable passed to the function by using the keyword typeid in line 25. If we pass a string or a class type object in the parameter list, it will display the type of parameter ...