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 <cmath>
#include <cstdlib>
template <typename T>
class Abs {
public:
// to fit in the framework:
enum { NumParams = 1 };
typedef T ReturnT;
typedef T Param1T;
// ``function call'':
T operator() (T v) const {
return std::abs(v);
}
};
template <typename T>
class Sine {
public:
// to fit in the framework:
enum { NumParams = 1 };
typedef T ReturnT;
typedef T Param1T;
// ``function call'':
T operator() (T a) const {
return std::sin(a);
}
};