Bug 725907 - for-of improvements, part 5: Make ctypes arrays iterable. r=bhackett.

--HG--
extra : rebase_source : 598baa07d9cfa41255aadff979ca8319e288a05b

js/src/ctypes/CTypes.cpp

@@ -514,6 +514,7 @@ static JSPropertySpec sArrayProps[] = {
 
 static JSFunctionSpec sArrayInstanceFunctions[] = {
   JS_FN("addressOfElement", ArrayType::AddressOfElement, 1, CDATAFN_FLAGS),
+  JS_FN("iterator",         JS_ArrayIterator, 0, CDATAFN_FLAGS),
   JS_FS_END
 };
 

js/src/jit-test/tests/for-of/ctypes.js

@@ -0,0 +1,17 @@
+// for-of works on CData objects of array type, but throws for other CData objects.
+
+if (this.ctypes) {
+    load(libdir + "asserts.js");
+    var v = ctypes.int32_t(17);
+    assertThrowsInstanceOf(function () { for (var x of v) ; }, TypeError);
+
+    var intarray_t = ctypes.int32_t.array();
+    var a = new intarray_t([0, 1, 1, 2, 3]);
+    var b = [x for (x of a)];
+    assertEq(b.join(), '0,1,1,2,3');
+
+    var it = a.iterator();
+    assertEq(it.next(), 0);
+    a[1] = -100;
+    assertEq(it.next(), -100);
+}