From 18d0e1fad0c1a29082c1b90c7d7dbb11c6440275 Mon Sep 17 00:00:00 2001
From: "John J. Camilleri" <john@digitalgrammars.com>
Date: Wed, 12 Jun 2019 09:51:27 +0200
Subject: [PATCH] gflb.ts: add comments about startsWith polyfill, making into
 module

---
 src/runtime/typescript/gflib.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/runtime/typescript/gflib.ts b/src/runtime/typescript/gflib.ts
index cbba6a524..4d5a45cfd 100644
--- a/src/runtime/typescript/gflib.ts
+++ b/src/runtime/typescript/gflib.ts
@@ -1535,6 +1535,8 @@ function isUndefined(a: any): boolean {
 //   }
 // }
 
+// A polyfill with provides the String.startsWith function for older targets
+// If you are targeting ES6(2015) or later, you don't need this
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith#Polyfill
 // if (!String.prototype.startsWith) {
 interface String {
@@ -1547,3 +1549,22 @@ Object.defineProperty(String.prototype, 'startsWith', {
   }
 })
 // }
+
+// If you want to make this into a proper module, uncomment this:
+// export {
+//   GFGrammar,
+//   GFAbstract,
+//   GFConcrete,
+//   Fun,
+//   Type,
+//   Apply,
+//   Coerce,
+//   PArg,
+//   Const,
+//   CncFun,
+//   SymCat,
+//   SymKS,
+//   SymKP,
+//   SymLit,
+//   Alt,
+// }