1 files changed, 23 insertions, 0 deletions
diff --git a/llparse-frontend/src/enumerator.ts b/llparse-frontend/src/enumerator.ts
new file mode 100644
index 0000000..f2940a2
--- /dev/null
+++ b/llparse-frontend/src/enumerator.ts
@@ -0,0 +1,23 @@
+import { Node } from './node';
+import { IWrap } from './wrap';
+
+export class Enumerator {
+  public getAllNodes(root: IWrap<Node>): ReadonlyArray<IWrap<Node>> {
+    const nodes: Set<IWrap<Node>> = new Set();
+    const queue = [ root ];
+
+    while (queue.length !== 0) {
+      const node = queue.pop()!;
+      for (const slot of node.ref.getSlots()) {
+        if (nodes.has(slot.node)) {
+          continue;
+        }
+
+        nodes.add(slot.node);
+        queue.push(slot.node);
+      }
+    }
+
+    return Array.from(nodes);
+  }
+}