diff --git a/Array.js b/Array.js
index ec29b91..be2b758 100644
--- a/Array.js
+++ b/Array.js
@@ -492,6 +492,7 @@ object.Mixin('ArrayProtoMixin', 'soft', {
 	smap: stoppableList('map'),
 	sfilter: stoppableList('filter'),
 	sreduce: stoppableValue('reduce'),
+	sreduceRight: stoppableValue('reduceRight'),
 	sforEach: stoppableValue('map', true),
 
 	// Chunk iteration...
diff --git a/Promise.js b/Promise.js
index b9dd3f5..ac4b131 100644
--- a/Promise.js
+++ b/Promise.js
@@ -103,11 +103,11 @@ object.Constructor('IterablePromise', Promise, {
 	// 				.map(e => e)
 	// XXX should these support STOP???
 	map: function(func){
-		return this.constructor(this.__list.flat(), 
+		return this.constructor(this, 
 			function(e){
 				return [func(e)] }) },
 	filter: function(func){
-		return this.constructor(this.__list.flat(), 
+		return this.constructor(this, 
 			function(e){
 				return func(e) ? 
 					[e] 
@@ -120,14 +120,14 @@ object.Constructor('IterablePromise', Promise, {
 	// NOTE: since order of execution can not be guaranteed there is no
 	// 		point in implementing .reduceRight(..)
 	reduce: function(func, res){
-		return this.constructor(this.__list.flat(), 
+		return this.constructor(this, 
 				function(e){
 					res = func(res, e)
 					return [] })
 			.then(function(){ 
 				return res }) },
 	flat: function(depth=1){
-		return this.constructor(this.__list.flat(), 
+		return this.constructor(this, 
 			function(e){ 
 				return (depth > 1 
 							&& e != null 
@@ -136,41 +136,36 @@ object.Constructor('IterablePromise', Promise, {
 					: depth != 0 ?
 						e
 					: [e] }) },
-	// XXX REVERSE...
-	// XXX BUG: 
-	//			await Promise.iter([1, Promise.iter(['a', ['b', 'c']]), [2, 3], 4])
-	//				.flat()
-	//					-> [ 1, 'a', [ 'b', 'c' ], 2, 3, 4 ]
-	// 			await Promise.iter([1, Promise.iter(['a', ['b', 'c']]), [2, 3], 4])
-	// 				.flat()
-	// 				.reverse()
-	//					-> [ 4, 2, 3, [ 'b', 'c', 'a' ], 1 ]
-	//		...should be:
-	//					-> [ 4, 2, 3, [ 'b', 'c' ], 'a', 1 ]
-	//		it's odd we are not seeing this in other places...
+	// XXX does not work yet...
+	//		> await Promise.iter([1, [2, [3]], Promise.iter([4, [5], Promise.resolve(777)])])
+	//			.flat()
+	//				-> [ 1, 2, [ 3 ], 4, [ 5 ], 777 ]
+	//		> await Promise.iter([1, [2, [3]], Promise.iter([4, [5], Promise.resolve(777)])])
+	//			.flat()
+	//			.reverse()
+	//				-> [ 4, [ 5 ], 777, [ 3 ], 2, 1 ]
+	//		The problem above is in that we seem to forget we got flattened...
 	reverse: function(){
-		return this.constructor(this.__list
-			.map(function(elems){
-				return elems && elems.then ?
-					elems.then(function(res){
-						return res
+		var lst = this.__list
+		return this.constructor(
+			lst instanceof Promise ?
+				lst.then(function(elems){
+					return elems instanceof Array ?
+						elems.slice()
 							.reverse()
-				   			.flat() })
-					: elems })
-			.reverse()
-			.flat()) },
+						: elems })
+			: lst
+				.map(function(elems){
+					return elems instanceof Array ?
+						elems.slice()
+							.reverse()
+						: elems })
+				.reverse(),
+			'raw') },
 
 	// compatibility with root promise...
 	iter: function(){
-		return this.constructor(
-			// clone and unwrap the .__list
-			this.__list
-				.map(function(elems){
-					return elems && elems.then ?
-						elems.then(function(res){
-							return res.flat() })
-						: elems })
-				.flat()) },
+		return this.constructor(this) },
 	
 	// XXX do we need these?
 	// 			.pop()
@@ -232,11 +227,11 @@ object.Constructor('IterablePromise', Promise, {
 	//
 	// Spectial cases usefull for extending this constructor...
 	//
-	//	Clone the iterator...
-	//	Promise.iter([ .. ], false)
+	//	Set raw .__list without any pre-processing...
+	//	Promise.iter([ .. ], 'raw')
 	//		-> iterable-promise
 	//
-	//	Create a rejected iterator...
+	//	XXX Create a rejected iterator...
 	//	Promise.iter(false)
 	//		-> iterable-promise
 	//
@@ -255,11 +250,6 @@ object.Constructor('IterablePromise', Promise, {
 	// 			execution and not order of elements...
 	// XXX add support for list as a promise....
 	__new__: function(_, list, handler){
-		// handle: IterablePromise(<list>, <mode>)
-		if(typeof(handler) == 'string'){
-			mode = handler
-			handler = undefined }
-
 		// instance...
 		var promise
 		var obj = Reflect.construct(
@@ -275,33 +265,46 @@ object.Constructor('IterablePromise', Promise, {
 			IterablePromise)
 
 		if(promise){
-			// clone/normalize...
-			list = 
-				list instanceof Promise ?
-					// XXX broken by reverse/flat but seems to work OK with others...
-					[list]
-				: list
-					.map(function(e){
-						return (e && e.then) ?
-							e.then(function(e){ 
-								return [e] })
-							: [e] })
 
-			if(handler){
+			if(handler != 'raw'){
+				handler = handler
+					?? function(e){ 
+						return [e] }
+
 				// NOTE: this is recursive to handle expanding nested promises...
 				var handle = function(elem){
 					// call the handler...
 					return (elem && elem.then) ?
-						elem.then(function(elems){
-							return elems
-								.map(handle)
-								.flat() })
-						: elem 
-							.map(handler)
-							.flat() }
+						elem.then(function(elem){
+							return handler(elem) })
+						: handler(elem) }
 
 				// handle the list...
-				list = list.map(handle) }
+				// NOTE: we can't .flat() the results here as we need to 
+				// 		wait till all the promises resolve...
+				list =
+					(list instanceof IterablePromise 
+							&& !(list.__list instanceof Promise)) ?
+						// NOTE: this is essentially the same as below but 
+						// 		with a normalized list as input...
+						// 		XXX can we merge the two???
+						list.__list
+							.map(function(elems){
+								return elems instanceof Promise ?
+									elems.then(function(elems){
+										return elems
+											.map(handle) 
+											.flat() })
+									: elems
+										.map(handle)
+										.flat() })
+					: list instanceof Promise ?
+						// special case: promised list...
+						list.then(function(list){
+							return [list].flat()
+								.map(handle) })	
+					: [list].flat()
+						.map(handle) }
 
 			Object.defineProperty(obj, '__list', {
 				value: list,
@@ -309,9 +312,15 @@ object.Constructor('IterablePromise', Promise, {
 			})
 
 			// handle promise state...
-			Promise.all(list)
+			//Promise.all(list)
+			;(list instanceof Promise ?
+					// special case: promised list...
+					list
+					: Promise.all([list].flat()))
 				.then(function(res){
-					promise.resolve(res.flat()) })
+					promise.resolve(handler ?
+						res.flat()
+						: res) })
 				.catch(promise.reject) }
 
 		return obj },
diff --git a/RegExp.js b/RegExp.js
index 7366dba..176c2b2 100644
--- a/RegExp.js
+++ b/RegExp.js
@@ -20,15 +20,52 @@ object.Mixin('RegExpMixin', 'soft', {
 	quoteRegExp: function(str){
 		return str
 			.replace(/([\.\\\/\(\)\[\]\$\*\+\-\{\}\@\^\&\?\<\>])/g, '\\$1') }
+})
 
-	// XXX add introspection interface...
-	// 		- number of groups
-	// 		- group info
-	// 		- ...
+
+var GROUP_PATERN =
+//module.GROUP_PATERN = /(^\(|[^\\]\()/g
+module.GROUP_PATERN = new RegExp([
+	'^\\(',
+	// non-escaped braces...
+	'[^\\\\]\\(',
+	// XXX ignore braces in ranges...
+	// XXX '\\[.*(.*\\]',
+].join('|'))
+
+// Pattern group introspection...
+var RegExpProtoMixin =
+module.RegExpProtoMixin =
+object.Mixin('RegExpProtoMixin', 'soft', {
+	// Format:
+	// 	[
+	// 		{
+	//			index: <index>,
+	//			name: <name>,
+	//			pattern: <string>,
+	//			offset: <offset>,
+	// 		},
+	// 		...
+	// 	]
+	// XXX cache this...
+	get groups(){
+		this.toString()
+			.matchAll(GROUP_PATERN)
+	},
+	get namedGroups(){
+		return this.groups
+			.reduce(function(res, e){
+				e.name
+					&& (res[name] = e)
+				return res }, {}) },
+	get groupCount(){
+		return this.groups.length },
 })
 
 
 RegExpMixin(RegExp)
+// XXX EXPEREMENTAL...
+//RegExpProtoMixin(RegExp.prototype)
 
 
 var quoteRegExp =
diff --git a/generator.js b/generator.js
index a10888d..9f60a2f 100644
--- a/generator.js
+++ b/generator.js
@@ -210,6 +210,7 @@ object.Mixin('GeneratorMixin', 'soft', {
 	map: makeGenerator('map'),
 	filter: makeGenerator('filter'),
 	reduce: makeGenerator('reduce'),
+	reduceRight: makeGenerator('reduceRight'),
 
 	// non-generators...
 	//
diff --git a/main.js b/main.js
index 7909a8c..af776f8 100644
--- a/main.js
+++ b/main.js
@@ -32,6 +32,7 @@ module.STOP = object.STOP
 
 // frequently used stuff...
 module.Generator = module.generator.Generator
+// XXX doc...
 module.iter = module.generator.iter
 
 
diff --git a/package-lock.json b/package-lock.json
index 739116a..bf6b1cc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ig-types",
-  "version": "6.0.9",
+  "version": "6.11.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "ig-types",
-      "version": "6.0.9",
+      "version": "6.11.0",
       "license": "BSD-3-Clause",
       "dependencies": {
         "ig-object": "^5.4.16",
@@ -33,22 +33,41 @@
         "node": ">=8"
       }
     },
-    "node_modules/@types/is-windows": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@types/is-windows/-/is-windows-1.0.0.tgz",
-      "integrity": "sha512-tJ1rq04tGKuIJoWIH0Gyuwv4RQ3+tIu7wQrC0MV47raQ44kIzXSSFKfrxFUOWVRvesoF7mrTqigXmqoZJsXwTg==",
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.0.7",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.0.7.tgz",
+      "integrity": "sha512-8cXDaBBHOr2pQ7j77Y6Vp5VDT2sIqWyWQ56TjEq4ih/a4iST3dItRe8Q9fp0rrIl9DoKhWQtUQz/YpOxLkXbNA==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.4.13",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.13.tgz",
+      "integrity": "sha512-GryiOJmNcWbovBxTfZSF71V/mXbgcV3MewDe3kIMCLyIh5e7SKAeUZs+rMnJ8jkMolZ/4/VsdBmMrw3l+VdZ3w==",
       "dev": true
     },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.13",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.13.tgz",
+      "integrity": "sha512-o1xbKhp9qnIAoHJSWd6KlCZfqslL4valSF81H8ImioOAxluWYWOpWkpyktY2vnt4tbrX9XYaxovq6cgowaJp2w==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.0.3",
+        "@jridgewell/sourcemap-codec": "^1.4.10"
+      }
+    },
     "node_modules/@types/istanbul-lib-coverage": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.3.tgz",
-      "integrity": "sha512-sz7iLqvVUg1gIedBOvlkxPlc8/uVzyS5OwGz1cKjXzkl3FpL3al0crU8YGU1WoHkxn0Wxbw5tyi6hvzJKNzFsw==",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.4.tgz",
+      "integrity": "sha512-z/QT1XN4K4KYuslS23k62yDIDLwLFkzxOuMplDtObz0+y7VqJCaO2o+SPwHCvLFZh7xazvvoor2tA/hPz9ee7g==",
       "dev": true
     },
     "node_modules/ansi-regex": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-      "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
       "dev": true,
       "engines": {
         "node": ">=8"
@@ -88,9 +107,9 @@
       "dev": true
     },
     "node_modules/balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
     "node_modules/brace-expansion": {
@@ -104,24 +123,23 @@
       }
     },
     "node_modules/c8": {
-      "version": "7.6.0",
-      "resolved": "https://registry.npmjs.org/c8/-/c8-7.6.0.tgz",
-      "integrity": "sha512-cQYCSepX54npWqOKAmRWwOnmN2XPyShpP3Hnw2VoaB/8fdiIke72tKClHLim4U5kSTFc1vjit0771oe+BL7qHw==",
+      "version": "7.11.3",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-7.11.3.tgz",
+      "integrity": "sha512-6YBmsaNmqRm9OS3ZbIiL2EZgi1+Xc4O24jL3vMYGE6idixYuGdy76rIfIdltSKDj9DpLNrcXSonUTR1miBD0wA==",
       "dev": true,
       "dependencies": {
         "@bcoe/v8-coverage": "^0.2.3",
-        "@istanbuljs/schema": "^0.1.2",
+        "@istanbuljs/schema": "^0.1.3",
         "find-up": "^5.0.0",
         "foreground-child": "^2.0.0",
-        "furi": "^2.0.0",
-        "istanbul-lib-coverage": "^3.0.0",
+        "istanbul-lib-coverage": "^3.2.0",
         "istanbul-lib-report": "^3.0.0",
-        "istanbul-reports": "^3.0.2",
-        "rimraf": "^3.0.0",
+        "istanbul-reports": "^3.1.4",
+        "rimraf": "^3.0.2",
         "test-exclude": "^6.0.0",
-        "v8-to-istanbul": "^7.1.0",
-        "yargs": "^16.0.0",
-        "yargs-parser": "^20.0.0"
+        "v8-to-istanbul": "^9.0.0",
+        "yargs": "^16.2.0",
+        "yargs-parser": "^20.2.9"
       },
       "bin": {
         "c8": "bin/c8.js"
@@ -142,13 +160,13 @@
       }
     },
     "node_modules/color": {
-      "version": "3.1.3",
-      "resolved": "https://registry.npmjs.org/color/-/color-3.1.3.tgz",
-      "integrity": "sha512-xgXAcTHa2HeFCGLE9Xs/R82hujGtu9Jd9x4NW3T34+OMs7VoPsjwzRczKHvTAHeJwWFwX5j15+MgAppE8ztObQ==",
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/color/-/color-3.2.1.tgz",
+      "integrity": "sha512-aBl7dZI9ENN6fUGC7mWpMTPNHmWUSNan9tuWN6ahh5ZLNk9baLJOnSMlrQkHcrfFgz2/RigjUVAjdx36VcemKA==",
       "dev": true,
       "dependencies": {
-        "color-convert": "^1.9.1",
-        "color-string": "^1.5.4"
+        "color-convert": "^1.9.3",
+        "color-string": "^1.6.0"
       }
     },
     "node_modules/color-convert": {
@@ -163,13 +181,13 @@
     "node_modules/color-name": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
-      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+      "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
       "dev": true
     },
     "node_modules/color-string": {
-      "version": "1.5.5",
-      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.5.5.tgz",
-      "integrity": "sha512-jgIoum0OfQfq9Whcfc2z/VhCNcmQjWbey6qBX0vqt7YICflUmBCh9E9CiQD5GSJ+Uehixm3NUwHVhqUAWRivZg==",
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.9.1.tgz",
+      "integrity": "sha512-shrVawQFojnZv6xM40anx4CkoDP+fZsw/ZerEMsW/pyzsRbElpsL/DBVW7q3ExxwusdNXI3lXpuhEZkzs8p5Eg==",
       "dev": true,
       "dependencies": {
         "color-name": "^1.0.0",
@@ -188,13 +206,13 @@
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
       "dev": true
     },
     "node_modules/convert-source-map": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
-      "integrity": "sha512-4FJkXzKXEDB1snCFZlLP4gpC3JILicCpGbzG9f9G7tGqGCzETQ2hWPrcinA9oU4wtf2biUaEH5065UnMeR33oA==",
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.8.0.tgz",
+      "integrity": "sha512-+OQdjP49zViI/6i7nIJpA8rAl4sV/JdPfU9nZs3VqOwGIgizICvuN2ru6fMd+4llL0tar18UYJXfZ/TWtmhUjA==",
       "dev": true,
       "dependencies": {
         "safe-buffer": "~5.1.1"
@@ -261,19 +279,9 @@
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
-      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
+      "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
       "dev": true
     },
-    "node_modules/furi": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/furi/-/furi-2.0.0.tgz",
-      "integrity": "sha512-uKuNsaU0WVaK/vmvj23wW1bicOFfyqSsAIH71bRZx8kA4Xj+YCHin7CJKJJjkIsmxYaPFLk9ljmjEyB7xF7WvQ==",
-      "dev": true,
-      "dependencies": {
-        "@types/is-windows": "^1.0.0",
-        "is-windows": "^1.0.2"
-      }
-    },
     "node_modules/get-caller-file": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
@@ -284,15 +292,15 @@
       }
     },
     "node_modules/glob": {
-      "version": "7.1.6",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
-      "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
+      "version": "7.2.3",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
+      "integrity": "sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==",
       "dev": true,
       "dependencies": {
         "fs.realpath": "^1.0.0",
         "inflight": "^1.0.4",
         "inherits": "2",
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@@ -1258,30 +1247,24 @@
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diff --git a/package.json b/package.json
index 954f78b..63b0953 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-types",
-  "version": "6.11.1",
+  "version": "6.11.2",
   "description": "Generic JavaScript types and type extensions...",
   "main": "main.js",
   "scripts": {