exprinterface.h

精确的函数表达模板,里面包含了许多C和C++的函数表达模板

/****************************************************************************
 * Copyright (C) 2001        Piece Wise Functions
 *                           Carlo Galotto
 *                           Italy
 *                           Email: [e-mail]
 *                                  [e-mail]
 *
 *
 * This framework is free  software; you can  redistribute it and/or modify
 * it. This framework is distributed  in the  hope  that  it  will  be useful,
 * but WITHOUT ANY WARRANTY;  without even the   implied  warranty of
 * MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.
 * The proposed framework is based upon the paper "Expression Templates" by
 * Todd Veldhuizen.
 ****************************************************************************/

// Class: ExprInterface

#ifndef __EXPRINTR_H       //Required for current class
  #define __EXPRINTR_H

   /////////////////////////////////////////////////////////////////////////////
   // Abstract Expression Interface
   template <class argT, class resT>
   class ExprInterface
   {
      public:
         // Clone
         virtual ExprInterface * clone() const = 0;

         // Evaluator
         virtual resT operator()(const argT& x) const = 0;

         //Destructor
         virtual ~ExprInterface() {;}
   };

#endif