type5.hpp

C++ Templates 完全导引范例

/* The following code example is taken from the book
 * "C++ Templates - The Complete Guide"
 * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
 *
 * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
template<typename R>
class CompoundT<R()> {
  public:
    enum { IsPtrT = 0, IsRefT = 0, IsArrayT = 0,
           IsFuncT = 1, IsPtrMemT = 0 };
    typedef R BaseT();
    typedef R BottomT();
    typedef CompoundT<void> ClassT;
};

template<typename R, typename P1>
class CompoundT<R(P1)> {
  public:
    enum { IsPtrT = 0, IsRefT = 0, IsArrayT = 0,
           IsFuncT = 1, IsPtrMemT = 0 };
    typedef R BaseT(P1);
    typedef R BottomT(P1);
    typedef CompoundT<void> ClassT;
};

template<typename R, typename P1>
class CompoundT<R(P1, ...)> {
  public:
    enum { IsPtrT = 0, IsRefT = 0, IsArrayT = 0,
           IsFuncT = 1, IsPtrMemT = 0 };
    typedef R BaseT(P1);
    typedef R BottomT(P1);
    typedef CompoundT<void> ClassT;
};
//...