From 0c96a2fbc06f0a7769c3f3f1083af7b91a4aecc8 Mon Sep 17 00:00:00 2001
From: "xiaozhuai, Weihang Ding" <798047000@qq.com>
Date: Tue, 7 Jun 2022 21:32:49 +0800
Subject: [PATCH] Fix break Regional_Indicator
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* Before `RS::Unicorn::grapheme_range("🇨🇳🇨🇳🇨🇳").size()` is `1`
* After: `RS::Unicorn::grapheme_range("🇨🇳🇨🇳🇨🇳").size()` is `3`
---
 unicorn/segment.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/unicorn/segment.cpp b/unicorn/segment.cpp
index 0ee4c7b..b58cf6c 100644
--- a/unicorn/segment.cpp
+++ b/unicorn/segment.cpp
@@ -51,8 +51,13 @@ namespace RS::Unicorn {
                     continue;
                 // Do not break between regional indicator symbols.
                 // GB8a. Regional_Indicator × Regional_Indicator
-                if (prev == P::Regional_Indicator && next == P::Regional_Indicator)
-                    continue;
+                if (prev == P::Regional_Indicator && next == P::Regional_Indicator){
+                    if (i >= 2) {
+                        return i;
+                    } else {
+                        continue;
+                    }
+                }
                 // Do not break before extending characters.
                 // GB9. × Extend
                 // Do not break before SpacingMarks, or after Prepend characters.