Add Generators

Author: azenla

bin/assert.dart renamed to assert.dart

@@ -0,0 +1,37 @@
+/// Dart has support for both asynchronous and synchronous generators.
+import "dart:async";
+
+Stream<int> read() async* {
+  var i = 0;
+  while (i < 5) {
+    i++;
+    yield i; // Pauses execution here, waits for receiver to iterate, asynchronously.
+  }
+}
+
+Iterable<int> readSync() sync* {
+  var i = 0;
+  while (i < 5) {
+    i++;
+    yield i; // Pauses execution here, waits for receiver to iterate.
+  }
+}
+
+Iterable<int> readMoreSync() sync* {
+  yield* readSync(); // You can also use yield* to yield another iterator or stream.
+  yield 10;
+}
+
+main() async {
+  await for (var i in read()) {
+    print("Asynchronous Generator: ${i}");
+  }
+
+  for (var i in readSync()) {
+    print("Synchronous Generator: ${i}");
+  }
+
+  for (var i in readMoreSync()) {
+    print("More Synchronous Generator: ${i}");
+  }
+}