The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017
template<typename T>
T max (T a, T b)
{
return b < a ? a : b;
}
int main()
{
::max<double>(1.0, -3.0); // explicitly specify template argument
::max(1.0, -3.0); // template argument is implicitly deduced to be double
::max<int>(1.0, 3.0); // the explicit <int> inhibits the deduction;
// hence the result has type int
}