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

Tests/base/NSCache/basic.m

@@ -0,0 +1,17 @@
+#import "ObjectTesting.h"
+#import <Foundation/NSAutoreleasePool.h>
+#import <Foundation/NSCache.h>
+
+int main()
+{
+  NSAutoreleasePool     *arp = [NSAutoreleasePool new];
+  NSCache		*testObj;
+
+  testObj = [[NSCache new] autorelease];
+  [testObj setObject: @"hello" forKey: @"there"];
+  test_alloc(@"NSCache");
+  test_NSObject(@"NSCache", [NSArray arrayWithObject: testObj]);
+
+  [arp release]; arp = nil;
+  return 0;
+}