Extreme cleanup, see src/obsolete for details

eo/src/eoFunctor.h

@@ -0,0 +1,144 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoFunctor.h
+// (c) Maarten Keijzer 2000
+/* 
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             mak@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoFunctor_h
+#define _eoFunctor_h
+
+/// Base class for functors to get a nice hierarchy diagram
+class eoFunctorBase 
+{
+public :
+    virtual ~eoFunctorBase() {}
+
+    /// tag to identify a procedure in compile time function selection @see functor_category
+    struct procedure_tag {};
+    /// tag to identify a unary function in compile time function selection @see functor_category
+    struct unary_function_tag {};
+    /// tag to identify a binary function in compile time function selection @see functor_category
+    struct binary_function_tag {};
+};
+
+/** 
+    Basic Procedure. Derive from this class when defining 
+    any procedure. It defines a result_type that can be used
+    to determine the return type
+    Argument and result types can be any type including void for
+    result_type
+**/
+template <class R>
+class eoProcedure : public eoFunctorBase
+{
+public :
+    
+    /// virtual dtor here so there is no need to define it in derived classes
+    virtual ~eoProcedure() {}
+
+    typedef R result_type;
+    
+    /// The pure virtual function that needs to be implemented by the subclass
+    virtual R operator()() = 0;
+};
+
+/**
+    Overloaded function that can help in the compile time detection 
+    of the type of functor we are dealing with
+
+    @see eoCounter, make_counter
+*/
+template<class R>
+eoFunctorBase::procedure_tag functor_category(const eoProcedure<R>&)
+{
+    return eoFunctorBase::procedure_tag();
+}
+
+/** 
+    Basic Unary Functor. Derive from this class when defining 
+    any unary function. First template argument is result_type, second
+    is first_argument_type.
+    Argument and result types can be any type including void for
+    result_type
+**/
+template <class R, class A1>
+class eoUnaryFunctor : public eoFunctorBase
+{
+public :
+
+    /// virtual dtor here so there is no need to define it in derived classes
+    virtual ~eoUnaryFunctor() {}
+
+    typedef R result_type;
+    typedef A1 first_argument_type;
+
+    /// The pure virtual function that needs to be implemented by the subclass
+    virtual R operator()(A1) = 0;
+};
+
+/**
+    Overloaded function that can help in the compile time detection 
+    of the type of functor we are dealing with
+    @see eoCounter, make_counter
+*/
+template<class R, class A1>
+eoFunctorBase::unary_function_tag functor_category(const eoUnaryFunctor<R, A1>&)
+{
+    return eoFunctorBase::unary_function_tag();
+}
+
+
+/** 
+    Basic Binary Functor. Derive from this class when defining 
+    any binary function. First template argument is result_type, second
+    is first_argument_type, third is second_argument_type.
+    Argument and result types can be any type including void for
+    result_type
+**/
+template <class R, class A1, class A2>
+class eoBinaryFunctor : public eoFunctorBase
+{
+public :
+        /// virtual dtor here so there is no need to define it in derived classes
+    virtual ~eoBinaryFunctor() {}
+    
+    typedef R result_type;
+    typedef A1 first_argument_type;
+    typedef A2 second_argument_type;
+
+    /// The pure virtual function that needs to be implemented by the subclass
+    virtual R operator()(A1, A2) = 0;
+};
+
+/**
+    Overloaded function that can help in the compile time detection 
+    of the type of functor we are dealing with
+    @see eoCounter, make_counter
+*/
+template<class R, class A1, class A2>
+eoFunctorBase::binary_function_tag functor_category(const eoBinaryFunctor<R, A1, A2>&)
+{
+    return eoFunctorBase::binary_function_tag();
+}
+
+
+#endif