From 5a6e550d77b0bd7546c75146aed4699b1bbb85cb Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Tue, 24 Oct 2017 04:44:58 -0700
Subject: [PATCH 1/1] Add some support for asynchronousish construction.

---
 lib/index.ts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/index.ts b/lib/index.ts
index 41da6f5..3d7f603 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -28,6 +28,10 @@ export abstract class Resource {
         this.finalizes = [];
     }
 
+    public async _(): Promise<this> {
+        return this;
+    }
+
     public retain(): void {
         ++this.retainers;
     }
@@ -99,6 +103,18 @@ export function using<Type extends Resource, Value>(resource: Type, code: (resou
     }
 }
 
+export function construct(target: any, property: string, descriptor: PropertyDescriptor) {
+    const old = descriptor.value;
+    descriptor.value = async function(this: Resource): Promise<any> {
+        const parent = target.__proto__;
+        await parent._.call(this); try {
+            return await old.call(this);
+        } catch (error) {
+            parent.finalize.call(this);
+        throw error; }
+    };
+}
+
 interface Waitable<Value> {
     size: number;
     values(): IterableIterator<Value>;
-- 
2.45.2