Modify the interfaces of all collection classes to be compatible with the

new lightweight generics implemenation. (Newer MacOS X/iOS code assuming 
the presence of the generics annotations can otherwise not be compiled with
GNUstep). This should be well-behaved under clang and gcc both. 

Fix NSCache which was copying the cache keys when it really shouldn't
have. Added a few test cases for eviction behaviour.

Few smaller tweaks to avoid compiler warnings.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@39406 72102866-910b-0410-8b05-ffd578937521

Headers/Foundation/NSEnumerator.h

@@ -1,4 +1,4 @@
-/* 
+/*
    NSEnumerator.h
 
    Copyright (C) 1998 Free Software Foundation, Inc.
@@ -12,7 +12,7 @@
    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
@@ -30,11 +30,14 @@
 
 #import	<Foundation/NSObject.h>
 
+
 #if	defined(__cplusplus)
 extern "C" {
 #endif
 
-typedef struct 
+@class GS_GENERIC_CLASS(NSArray, ElementT);
+
+typedef struct
 {
   unsigned long	state;
   __unsafe_unretained id		*itemsPtr;
@@ -43,14 +46,14 @@ typedef struct
 } NSFastEnumerationState;
 
 @protocol NSFastEnumeration
-- (NSUInteger) countByEnumeratingWithState: (NSFastEnumerationState *)state 
+- (NSUInteger) countByEnumeratingWithState: (NSFastEnumerationState *)state
 				   objects: (__unsafe_unretained id[])stackbuf
 				     count: (NSUInteger)len;
 @end
 
-@interface NSEnumerator : NSObject <NSFastEnumeration>
-- (NSArray *) allObjects;
-- (id) nextObject;
+@interface GS_GENERIC_CLASS(NSEnumerator, IterT) : NSObject <NSFastEnumeration>
+- (GS_GENERIC_CLASS(NSArray, IterT) *) allObjects;
+- (GS_GENERIC_TYPE(IterT)) nextObject;
 @end
 
 #if	defined(__cplusplus)