Convert Map and Set to use lambdas

rhino/src/main/java/org/mozilla/javascript/AbstractEcmaObjectOperations.java

@@ -264,8 +264,19 @@ static Map<Object, List<Object>> groupBy(
             Object items,
             Object callback,
             KEY_COERCION keyCoercion) {
+        return groupBy(cx, scope, f.getTag(), f.getFunctionName(), items, callback, keyCoercion);
+    }
+
+    static Map<Object, List<Object>> groupBy(
+            Context cx,
+            Scriptable scope,
+            Object classTag,
+            String functionName,
+            Object items,
+            Object callback,
+            KEY_COERCION keyCoercion) {
         if (cx.getLanguageVersion() >= Context.VERSION_ES6) {
-            ScriptRuntimeES6.requireObjectCoercible(cx, items, f);
+            ScriptRuntimeES6.requireObjectCoercible(cx, items, classTag, functionName);
         }
         if (!(callback instanceof Callable)) {
             throw ScriptRuntime.typeErrorById(

rhino/src/main/java/org/mozilla/javascript/LambdaConstructor.java

@@ -192,6 +192,16 @@ public void definePrototypeProperty(Symbol key, Object value, int attributes) {
         proto.defineProperty(key, value, attributes);
     }
 
+    public void definePrototypeProperty(Context cx, String name, ScriptableObject descriptor) {
+        ScriptableObject proto = getPrototypeScriptable();
+        proto.defineOwnProperty(cx, name, descriptor);
+    }
+
+    public void definePrototypeProperty(Context cx, Symbol key, ScriptableObject descriptor) {
+        ScriptableObject proto = getPrototypeScriptable();
+        proto.defineOwnProperty(cx, key, descriptor);
+    }
+
     /**
      * Define a property on the prototype using a function. The function will be wired to a
      * JavaScript function, so the resulting property will look just like one that was defined using
@@ -203,6 +213,12 @@ public void definePrototypeProperty(
         proto.defineProperty(cx, name, getter, null, attributes);
     }
 
+    public void definePrototypeProperty(
+            Context cx, Symbol key, ScriptableObject.LambdaGetterFunction getter, int attributes) {
+        ScriptableObject proto = getPrototypeScriptable();
+        proto.defineProperty(cx, key, getter, null, attributes);
+    }
+
     /**
      * Define a property on the prototype using functions for getter and setter. The function will
      * be wired to a JavaScript function, so the resulting property will look just like one that was
@@ -218,6 +234,20 @@ public void definePrototypeProperty(
         proto.defineProperty(cx, name, getter, setter, attributes);
     }
 
+    /** Define a property on the prototype that has the same value as another property. */
+    public void definePrototypeAlias(String name, SymbolKey alias, int attributes) {
+        ScriptableObject proto = getPrototypeScriptable();
+        Object val = proto.get(name, proto);
+        proto.defineProperty(alias, val, attributes);
+    }
+
+    /** Define a property on the prototype that has the same value as another property. */
+    public void definePrototypeAlias(String name, String alias, int attributes) {
+        ScriptableObject proto = getPrototypeScriptable();
+        Object val = proto.get(name, proto);
+        proto.defineProperty(alias, val, attributes);
+    }
+
     /**
      * Define a function property directly on the constructor that is implemented under the covers
      * by a LambdaFunction.