added for-await-of support for Promise.iter(..)...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Promise.js

@@ -249,6 +249,15 @@ object.Constructor('IterablePromise', Promise, {
 			: (await Promise.all(list))
 				.flat() },
 
+	[Symbol.asyncIterator]: async function*(){
+		var list = this.__packed
+		if(list instanceof Promise){
+			yield this.__unpack(await list) 
+			return }
+		for await(var elem of list){
+			yield* elem instanceof Array ?
+				elem
+				: [elem] } },
 
 	// iterator methods...
 	//

README.md

@@ -1580,6 +1580,14 @@ in how they process values:
   appropriate method on the result.
   <!-- XXX list + mark definitions as "(proxy)" -->
 
+Promise iterators directly support _for-await-of_ iteration:
+
+```javascript
+for await (var elem of Promise.iter(/* ... */)){
+    // ...
+}
+```
+
 <!-- 
 XXX should we support generators as input?
     ...not sure about the control flow direction here, on one hand the generator

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ig-types",
-  "version": "6.17.0",
+  "version": "6.18.0",
   "description": "Generic JavaScript types and type extensions...",
   "main": "main.js",
   "scripts": {