From 31c96dd4ea002d516548f3ca583d2662b55bb247 Mon Sep 17 00:00:00 2001
From: Rintim <rintim@foxmail.com>
Date: Sun, 17 Sep 2023 02:46:10 +0800
Subject: [PATCH] determine the arg of `gnc.of` as a generator function.

`gnc.of` needs a generator function, so we check the input value to make the error clear.
---
 game/game.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/game/game.js b/game/game.js
index adef4af72..6351d1d18 100644
--- a/game/game.js
+++ b/game/game.js
@@ -32,7 +32,7 @@
 	const GeneratorFunction=(function*(){}).constructor;
 	// gnc: GeNCoroutine
 	const gnc={
-		of:fn=>function genCoroutine(){
+		of:fn=>gnc.is.generatorFunc(fn)?function genCoroutine(){
 			let gen=fn.apply(this,arguments);
 			gen.status="next";
 			gen.state=undefined;
@@ -61,7 +61,7 @@
 				result=result.value;
 				Promise.resolve(result).then(nexts,throws);
 			});
-		},
+		}:(()=>{throw new TypeError("gnc.of needs a GeneratorFunction.")})(),
 		/*
 		await:gen=>new Promise((resolve,reject)=>{
 			let result=gen;