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
MK_PROMOTION(bool, char, int)
MK_PROMOTION(bool, unsigned char, int)
MK_PROMOTION(bool, signed char, int)
//...