memory word cleanups, sdl numlock fix

TODO.FACTOR.txt

@@ -14,13 +14,11 @@
 - code gc
 - #jump-f #jump-f-label
 - extract word inside M:, C:, and structure browsing for these
-- references primitive
 - fix completion invoke in middle of word
 - don't hardcode so many colors
 - ffi unicode strings: null char security hole
 - utf16 string boxing
 - more accurate types for various words
-- optimize out >array, >tuple, >hashtable etc
 - write read: write should flush
 
 + compiler/ffi:

library/sdl/sdl-keysym.factor

@@ -42,8 +42,9 @@ SYMBOL: modifiers
     [[ "ALT"   HEX: 0200 ]]
     [[ "META"  HEX: 0400 ]]
     [[ "META"  HEX: 0800 ]]
-    [[ "NUM"   HEX: 1000 ]]
+! We ignore these two modifiers since they're mighty useless
-    [[ "CAPS"  HEX: 2000 ]]
+!    [[ "NUM"   HEX: 1000 ]]
+!    [[ "CAPS"  HEX: 2000 ]]
     [[ "MODE"  HEX: 4000 ]]
 ] modifiers set
 

library/tools/memory.factor

@@ -36,12 +36,12 @@ namespaces prettyprint stdio unparser vectors words ;
         end-scan rethrow
     ] catch ; inline
 
-: instances ( class -- list )
+: instances ( quot -- list )
-    #! Return a list of all instances of a built-in or tuple
+    #! Return a list of all object that return true when the
-    #! class in the image.
+    #! quotation is applied to them.
     [
         [
-            dup class pick = [ , ] [ drop ] ifte
+            [ swap call ] 2keep rot [ , ] [ drop ] ifte
         ] each-object drop
     ] make-list ;
 
@@ -70,9 +70,7 @@ M: object (each-slot) ( quot obj -- )
 : references ( obj -- list )
     #! Return a list of all objects that refer to a given object
     #! in the image.
-    [ ] [
+    [ dupd refers? ] instances nip ;
-        pick over refers? [ swons ] [ drop ] ifte
-    ] each-object nip ;
 
 : vector+ ( n index vector -- )
     [ vector-nth + ] 2keep set-vector-nth ;