From 8214f05fe34ff88775fe4b641175083fa97b9892 Mon Sep 17 00:00:00 2001
From: Tangent Wantwight <tangent128@gmail.com>
Date: Fri, 4 Aug 2023 02:18:07 -0400
Subject: [PATCH] Choose() returns the expected message from the alternative
 that made the furthest progress, if any did.

---
 peg.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/peg.js b/peg.js
index 44226a9..95a8231 100644
--- a/peg.js
+++ b/peg.js
@@ -90,15 +90,17 @@ Peg.Choose = function (...patterns) {
   const expected = patterns.map((pattern) => pattern.expectLabel).join(" | ");
   return Peg.WrapPattern(function (source, index) {
     let furthest = index;
+    let furthestExpected = expected;
     for (const pattern of patterns) {
       const match = pattern(source, index);
       if (match[0]) {
         return match;
       } else if (match[1] > furthest) {
         furthest = match[1];
+        furthestExpected = match[2];
       }
     }
-    return [false, furthest, expected];
+    return [false, furthest, furthestExpected];
   }).expects(expected);
 };