copied set implementations from MultiFlag JS

node/src/enumeration/number.ts

@@ -0,0 +1,26 @@
+export class BitFlagsIterator implements Iterator<number> {
+    private _value: number
+    private _current: number
+
+    public constructor(value: number) {
+        this._value = value
+        this._current = 1
+    }
+
+    public next(): IteratorResult<number, undefined> {
+        if (this._value == 0) {
+            return { done: true, value: undefined }
+        }
+
+        while ((this._value & 1) == 0) {
+            this._value >>= 1
+            this._current <<= 1
+        }
+
+        const result = this._current
+        this._value >>= 1
+        this._current <<= 1
+
+        return { done: false, value: result }
+    }
+}