The following code example is taken from the book
C++ Templates - The Complete Guide
by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
© Copyright David Vandevoorde and Nicolai M. Josuttis 2002
#include "myfirst.cpp"
// explicitly instantiate print_typeof() for type double
template void print_typeof<double>(double const&);