File 2961-More-indic-fixes.patch of Package erlang

From 8de68766bb8fe618d190c78b82625e3ab146f57e Mon Sep 17 00:00:00 2001
From: Dan Gudmundsson <dgud@erlang.org>
Date: Thu, 13 Nov 2025 13:07:13 +0100
Subject: [PATCH 1/4] More indic fixes

The specs have been update and are more descriptive and tests updated.

Update code generator accordingly.
---
 lib/stdlib/uc_spec/gen_unicode_mod.escript | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/lib/stdlib/uc_spec/gen_unicode_mod.escript b/lib/stdlib/uc_spec/gen_unicode_mod.escript
index 24cabc2ce6..8cbb131a55 100644
--- a/lib/stdlib/uc_spec/gen_unicode_mod.escript
+++ b/lib/stdlib/uc_spec/gen_unicode_mod.escript
@@ -953,15 +953,20 @@ gen_gc(Fd, GBP) ->
     io:put_chars(Fd, "gc_h_lv_lvt(R1, R0, Acc) -> gc_extend2(R1, R0, Acc).\n\n"),
 
     %% Indic
-    io:put_chars(Fd, "\n%% Handle Indic Conjunt Break\n"),
+    %% See tr44 5.3.1 Derivation of Indic_Conjunct_Break
+    %%  and IndicSyllabicCategory.txt  also tr29 conjunctCluster
+    io:put_chars(Fd, "\n%% Handle Indic Conjunct Break\n"),
+    Consonants = maps:get(consonant, GBP) ++
+        maps:get(vowel_independent, GBP) ++
+        [{16#1B0B, 16#1B0C}],
     GenIndicC = fun(Range) -> io:format(Fd, "is_indic_consonant~s true;\n", [gen_single_clause(Range)]) end,
-    [GenIndicC(CP) || CP <- merge_ranges(maps:get(consonant, GBP))],
+    [GenIndicC(CP) || CP <- merge_ranges(Consonants)],
     io:format(Fd, "is_indic_consonant(_) -> false.\n\n", []),
 
     GenIndicL = fun(Range) -> io:format(Fd, "is_indic_linker~s true;\n", [gen_single_clause(Range)]) end,
-    [GenIndicL(CP) || CP <- merge_ranges(maps:get(virama, GBP))],
+    Linkers = maps:get(virama, GBP) ++ maps:get(invisible_stacker, GBP),
+    [GenIndicL(CP) || CP <- merge_ranges(Linkers)],
     io:format(Fd, "is_indic_linker(_) -> false.\n\n", []),
-    %% io:format("Consonants: ~p~n", [merge_ranges(maps:get(consonant, GBP))]),
 
     io:put_chars(Fd,
                  """
-- 
2.51.0