Safe Cast templates for Objective-C

ObjcCast.hpp

#ifndef __JFF_CAST_FUNCTIONS_H__
#define __JFF_CAST_FUNCTIONS_H__

#import <Foundation/Foundation.h>

#pragma mark -
#pragma mark NSObject casts
template < class DESTINATION >
DESTINATION* objc_kind_of_cast( id nsObject )
{
   Class destination_class_ = [ DESTINATION class ];
   if ( ![ nsObject isKindOfClass: destination_class_ ] )
   {
      NSLog( @"[!!!ERROR!!!] objc_kind_of_cast class mismatch. Expected : %@. Received : %@", destination_class_, [ nsObject class ]  );
      return nil;
   }
   
   return (DESTINATION*)nsObject;
}


template < class DESTINATION >
DESTINATION* objc_member_of_cast( id nsObject )
{
   Class destination_class_ = [ DESTINATION class ];
   if ( ![ nsObject isMemberOfClass: destination_class_ ] )
   {
      NSLog( @"[!!!ERROR!!!] objc_member_of_cast class mismatch. Expected : %@. Received : %@", destination_class_, [ nsObject class ]  );
      return nil;
   }
   
   return (DESTINATION*)nsObject;
}


#pragma mark -
#pragma mark dynamic cast
extern BOOL class_srcIsSuperclassOfDest( Class src, Class dest );
extern BOOL class_isClassesInSameHierarchy( Class src, Class dest );

template < class DESTINATION >
DESTINATION* objc_dynamic_cast( id nsObject )
{
   return objc_kind_of_cast<DESTINATION>( nsObject );
}

template < class DESTINATION >
DESTINATION* objc_reinterpret_cast( id nsObject )
{
   return (DESTINATION*)nsObject;
}

#endif //__JFF_CAST_FUNCTIONS_H__