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Embedded Programming with Modern C++

Function Templates

Explore how to define and use function templates in Modern C++ to create reusable, type-safe functions. Understand template instantiation, argument passing, and overloading rules critical for writing efficient high-performance code.

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A function template is defined by placing the keyword template in front of the function template followed by type or non-type parameters.

  • The keyword class or typename declares the parameters.
  • The name T is usually used for the first parameter.
  • The parameter can be used in the body of the function.

Let’s take a look at an example of function templates:

C++
template <typename T>
void xchg(T&x , T&y){
...
template <int N>
int nTimes(int n){
...
...