added sorted-set-by, adapted from timothypratley's patch, fixes clojure#79

Signed-off-by: Chouser <chouser@n01se.net>

Author: cemerick

src/clj/clojure/core.clj

@@ -266,24 +266,30 @@
   "Returns a new hash set with supplied keys."
   ([] #{})
   ([& keys]
-   (. clojure.lang.PersistentHashSet (create keys))))
+   (clojure.lang.PersistentHashSet/create keys)))
 
 (defn sorted-map
   "keyval => key val
   Returns a new sorted map with supplied mappings."
   ([& keyvals]
-   (. clojure.lang.PersistentTreeMap (create keyvals))))
-
-(defn sorted-set
-  "Returns a new sorted set with supplied keys."
-  ([& keys]
-   (. clojure.lang.PersistentTreeSet (create keys))))
+   (clojure.lang.PersistentTreeMap/create keyvals)))
 
 (defn sorted-map-by
   "keyval => key val
   Returns a new sorted map with supplied mappings, using the supplied comparator."
   ([comparator & keyvals]
-   (. clojure.lang.PersistentTreeMap (create comparator keyvals))))
+   (clojure.lang.PersistentTreeMap/create comparator keyvals)))
+
+(defn sorted-set
+  "Returns a new sorted set with supplied keys."
+  ([& keys]
+   (clojure.lang.PersistentTreeSet/create keys)))
+
+(defn sorted-set-by
+  "Returns a new sorted set with supplied keys, using the supplied comparator."
+  ([comparator & keys]
+   (clojure.lang.PersistentTreeSet/create comparator keys)))
+
 
 ;;;;;;;;;;;;;;;;;;;;
 (def

src/jvm/clojure/lang/PersistentTreeSet.java

@@ -27,6 +27,15 @@ public static PersistentTreeSet create(Object... init){
 	return ret;
 }
 
+public static PersistentTreeSet create(Comparator comp, Object... init){
+	PersistentTreeSet ret = new PersistentTreeSet(null, new PersistentTreeMap(null, comp));
+	for(int i = 0; i < init.length; i++)
+		{
+		ret = (PersistentTreeSet) ret.cons(init[i]);
+		}
+	return ret;
+}
+
 public static PersistentTreeSet create(List init){
 	PersistentTreeSet ret = EMPTY;
 	for(Object key : init)
@@ -36,6 +45,15 @@ public static PersistentTreeSet create(List init){
 	return ret;
 }
 
+public static PersistentTreeSet create(Comparator comp, List init){
+	PersistentTreeSet ret = new PersistentTreeSet(null, new PersistentTreeMap(null, comp));
+	for(Object key : init)
+		{
+		ret = (PersistentTreeSet) ret.cons(key);
+		}
+	return ret;
+}
+
 static public PersistentTreeSet create(ISeq items){
 	PersistentTreeSet ret = EMPTY;
 	for(; items != null; items = items.next())
@@ -45,6 +63,15 @@ static public PersistentTreeSet create(ISeq items){
 	return ret;
 }
 
+static public PersistentTreeSet create(Comparator comp, ISeq items){
+	PersistentTreeSet ret = new PersistentTreeSet(null, new PersistentTreeMap(null, comp));
+	for(; items != null; items = items.next())
+		{
+		ret = (PersistentTreeSet) ret.cons(items.first());
+		}
+	return ret;
+}
+
 PersistentTreeSet(IPersistentMap meta, IPersistentMap impl){
 	super(meta, impl);
 }