Failed attempt at allowing async functions to be passed as `thing`: This will need a complete redesign to support this and I don"t care enough right now to do it.

Fortune for async-timeout-js's current commit: Middle blessing − 中吉

asynctimeout.js

@@ -15,10 +15,21 @@
 /// See `examples` below.
 function AsyncTimeout(thing, interval)
 {
+	function isPromise(obj) {
+	  return !!obj && (typeof obj === 'object' || typeof obj === 'function') && typeof obj.then === 'function';
+	}
+
+	async function _call(t)
+	{
+		if(isPromise(t)) return await t(arguments);
+		else await (async () => {});
+		return t(arguments);
+	}
+
 	this.timeout = () => new Promise((resolve, reject) => {
 		setTimeout(() => {
 			try {
-				resolve(thing());
+				_call(thing).then(resolve); //XXX: This design doesn't work, we'll need to go back to the drawing board with this function for this to work... The exception won't propagate here, so...
 			} catch(e) { reject(e); }
 		}, interval);
 	});
@@ -26,7 +37,7 @@ function AsyncTimeout(thing, interval)
 		while(true) {
 			yield await new Promise((resolve, reject) => {
 				setTimeout(() => {
-					try { resolve(thing()); } catch(e) { reject(e); }
+					try { _call(thing).then(resolve); } catch(e) { reject(e); }
 				}, interval);
 			});
 		}