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Update of /cvsroot/ogs/dist/c++/ogs/support
In directory sc8-pr-cvs1:/tmp/cvs-serv18323

Modified Files:
	Class.h 
Log Message:
Modeled after TypeInfo from Loki library.

Index: Class.h
===================================================================
RCS file: /cvsroot/ogs/dist/c++/ogs/support/Class.h,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** Class.h	18 Apr 2003 01:41:07 -0000	1.2
--- Class.h	26 Nov 2003 01:44:11 -0000	1.3
***************
*** 1,4 ****
  /*
!  * Class.h -- class interface for class identification
   * Copyright (C) 2002  Eric Lemings <ele...@us...>
   *
--- 1,4 ----
  /*
!  * Class.h -- class interface for type information
   * Copyright (C) 2002  Eric Lemings <ele...@us...>
   *
***************
*** 26,113 ****
  #    define OGS_SUPPORT_CLASS_H

! #    include <string>
  #    include <typeinfo>

  #    include <ogs/support/Namespace.h>
- #    include <ogs/support/Object.h>

  OGS_BEGIN_SUPPORT_NAMESPACE

  /**
!  * An object representing the class of another object.  This class is
!  * actually a thin wrapper for the type_info class declared in the
!  * @<typeinfo@> header of the standard C++ library.
   */
  class Class {
    public:
      template <class C>
      static Class getClass ();

-     bool operator== (const Class& cls) const;
-     bool operator!= (const Class& cls) const;
-     std::string getName () const;
- 
    private:
!     const std::type_info& typeInfo;

!     Class ();
!     Class (const std::type_info& typeInfo);

!     friend Class Object::getClass () const;
! };

  /**
!  * Determine the class of a type.  The type is given as a template
!  * argument.
   *
!  * @return Class of type.
   */
! template <class C>
! inline Class Class::getClass () {
!   Class c (typeid (C));
!   return (c);
  }

  /**
!  * Determine if this object describes the same class as another object.
   *
!  * @param cls Class to be compared to.
!  * @return True if the two objects describe the same class.
   */
  inline bool
! Class::operator== (const Class& cls) const {
!   return (typeInfo == cls.typeInfo);
  }

  /**
!  * Determine if this object does not describe the same class as another
!  * object.
   *
!  * @param cls Class to be compared to.
!  * @return True if each object describes a different class.
   */
! inline bool
! Class::operator!= (const Class& cls) const {
!   return (typeInfo != cls.typeInfo);
  }

  /**
!  * Determine the name of this class.
   *
!  * @return Name of class.
   */
! inline std::string Class::getName () const {
!   return (std::string (typeInfo.name ()));
  }

  /**
!  * Determine the class of this object.
   *
!  * @return Class of this object.
   */
! inline Class
! Object::getClass () const {
!   return (Class (typeid (*this)));
  }

  OGS_END_SUPPORT_NAMESPACE
--- 26,158 ----
  #    define OGS_SUPPORT_CLASS_H

! #    include <cassert>
  #    include <typeinfo>

  #    include <ogs/support/Namespace.h>

  OGS_BEGIN_SUPPORT_NAMESPACE

  /**
!  * An object that represents the class of another object.  This class is
!  * actually a thin wrapper for the <code>type_info</code> class declared
!  * in the @<typeinfo@> header of the standard C++ library.
   */
  class Class {
    public:
+     Class ();
+     Class (const std::type_info& typeInfo);
+ 
+     const std::type_info& getInfo () const;
+     const char* getName () const;
+     bool isBefore (const Class& rhs) const;
+ 
      template <class C>
      static Class getClass ();

    private:
!     const std::type_info* _typeInfo;
! };

! /**
!  * Create a new class object.  This constructor is provided for
!  * containers that require default constructors.
!  */
! inline
! Class::Class () {
!   class Nil { };
!   _typeInfo = &(typeid (Nil));
!   assert (_typeInfo);
! }
!    
! /**
!  * Create a new class object from type info.
!  *
!  * @param typeInfo A type info object.
!  */
! inline
! Class::Class (const std::type_info& typeInfo):
!   _typeInfo (&typeInfo) {
!   assert (_typeInfo);
! }

! /**
!  * Determine the type info contained in this class.
!  *
!  * @return Type info.
!  */
! inline const std::type_info&
! Class::getInfo () const {
!   assert (_typeInfo);
!   return (*_typeInfo);
! }

  /**
!  * Determine the name of this class.
   *
!  * @return Name of class.
   */
! inline const char*
! Class::getName () const {
!   assert (_typeInfo);
!   return (_typeInfo->name ());
  }

  /**
!  * Determine if this class is before another class in logical order.
   *
!  * @param rhs Another class object.
!  * @return True if this class is before the other class.
   */
  inline bool
! Class::isBefore (const Class& rhs) const {
!   assert (_typeInfo);
!   // type_info::before return type is int in some VC libraries 
!   return (_typeInfo->before (*(rhs._typeInfo)) != 0);
  }

  /**
!  * Determine the class of a type.  The type is given as a template
!  * argument.
   *
!  * @return Class of type.
   */
! template <class C>
! inline Class
! Class::getClass () {
!   Class c (typeid (C));
!   return (c);
  }

  /**
!  * Determine if this class is equivalent to another class.
   *
!  * @param lhs Class on left-hand side of operator.
!  * @param rhs Class on right-hand side of operator.
!  * @return True if the two classes are equivalewnt.
   */
! inline bool
! operator== (const Class& lhs, const Class& rhs) {
!   // type_info::operator== return type is int in some VC libraries
!   return (lhs.getInfo () == rhs.getInfo ()) != 0;
  }

  /**
!  * Determine if this class is less than another class.  This operator is
!  * used for imposing an order on class objects for operations like
!  * sorting
   *
!  * @param lhs Class on left-hand side of operator.
!  * @param rhs Class on right-hand side of operator.
!  * @return True if @c lhs is less than @c rhs.
   */
! inline bool
! operator< (const Class& lhs, const Class& rhs) {
!   return (lhs.isBefore (rhs));
  }
+ 
+ /*
+  * Portions of this file adapted from The Loki Library
+  * Copyright (c) 2001 by Andrei Alexandrescu
+  */

  OGS_END_SUPPORT_NAMESPACE

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