From 79f474549490324883248c19f65653a90b4e4827 Mon Sep 17 00:00:00 2001
From: Robin Leroy <egg.robin.leroy@gmail.com>
Date: Thu, 21 Mar 2024 18:28:51 +0100
Subject: [PATCH] ICU-22707 UTC-179-C25 Limit LB21a to the
 Hebrew-hyphen-non-Hebrew case

---
 icu4c/source/data/brkitr/rules/line.txt | 6 +++---
 icu4c/source/test/intltest/rbbitst.cpp  | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/icu4c/source/data/brkitr/rules/line.txt b/icu4c/source/data/brkitr/rules/line.txt
index 762adeb5ea0..098286f7c58 100644
--- a/icu4c/source/data/brkitr/rules/line.txt
+++ b/icu4c/source/data/brkitr/rules/line.txt
@@ -341,10 +341,10 @@ $LB20NonBreaks $CM* ($BA | $HY | $NS);
 $BB $CM* [^$CB];                                  #  $BB  x
 $BB $CM* $LB20NonBreaks;
 
-# LB 21a Don't break after Hebrew + Hyphen
-#   HL (HY | BA) x
+# LB 21a Do not break after the hyphen in Hebrew + Hyphen + non-Hebrew
+#   HL (HY | BA) x [^HL]
 #
-$HL $CM* ($HY | $BA) $CM* [^$CB]?;
+$HL $CM* ($HY | $BA) $CM* [^$CB $HL]?;
 
 # LB 21b (forward) Don't break between SY and HL
 # (break between HL and SY already disallowed by LB 13 above)
diff --git a/icu4c/source/test/intltest/rbbitst.cpp b/icu4c/source/test/intltest/rbbitst.cpp
index 03f74db4295..805887d6298 100644
--- a/icu4c/source/test/intltest/rbbitst.cpp
+++ b/icu4c/source/test/intltest/rbbitst.cpp
@@ -3343,9 +3343,9 @@ int32_t RBBILineMonkey::next(int32_t startPos) {
             continue;
         }
 
-        if (fHL->contains(prevCharX2) &&
-                (fHY->contains(prevChar) || fBA->contains(prevChar))) {
-            setAppliedRule(pos, "LB 21a   HL (HY | BA) x");
+        if (fHL->contains(prevCharX2) && (fHY->contains(prevChar) || fBA->contains(prevChar)) &&
+            !fHL->contains(thisChar)) {
+            setAppliedRule(pos, "LB 21a   HL (HY | BA) x [^HL]");
             continue;
         }