From e05a75f9ef628aab88226e56a00a3f3da106231a Mon Sep 17 00:00:00 2001
From: Ronald Tse <ronald.tse@ribose.com>
Date: Thu, 1 Oct 2026 19:37:06 +0800
Subject: [PATCH] fix: render the any_character function item
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any_character parses as a function item, not an alias reference, and
the item renderers had no branch for it — every rule guarded by
before any_character + any_character was silently dropped. kp-kor's
generic-suffix hyphenation (Kobi-ri) is built from such guards.

Direct corpus sweep: 35 failures / 13 maps -> 16 / 10 — kp-kor (8),
var-zho-wd (8) and odni-uzb (3) fully healed.
---
 src/interscript/isc.py |  4 ++++
 tests/test_engine.py   | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/interscript/isc.py b/src/interscript/isc.py
index 6d3535b..12b2355 100644
--- a/src/interscript/isc.py
+++ b/src/interscript/isc.py
@@ -693,6 +693,8 @@ def _render_item(item: dict, aliases: dict[str, str]) -> str:
         if name == "line_end":
             return "line_end"
         raise UnsupportedConstruct(f"primitive {name}")
+    if kind == "function" and item["name"] == "any_character":
+        return "any_character"
     if kind == "alias_ref":
         name = item["name"]
         if item.get("map"):
@@ -759,6 +761,8 @@ def _regex_of(item: dict, aliases: dict[str, str]) -> str:
             "line_end": "$",
             "space": " ",
         }.get(item["name"], None) or _unsupported_primitive(item["name"])
+    if kind == "function" and item["name"] == "any_character":
+        return "."
     if kind == "alias_ref":
         name = item["name"]
         if item.get("map"):
diff --git a/tests/test_engine.py b/tests/test_engine.py
index 76041e5..2564cbb 100644
--- a/tests/test_engine.py
+++ b/tests/test_engine.py
@@ -346,3 +346,14 @@ def test_par_unsafe_rule_forces_megaregexp_first_wins():
         '  }\n}\n'
     )
     assert Engine(tree).transliterate("i") == "X"
+
+
+@pytest.mark.skipif(not MAPS.is_dir(), reason="interscript maps repo not present")
+def test_any_character_renders():
+    """kp-kor hyphenates generics with before any_character +
+    any_character guards; the item renderer had no branch for the
+    any_character function item and silently dropped every such rule
+    (고비리 -> Kobiri instead of Kobi-ri)."""
+    e = _load("kp-kor-Hang-Latn-2002")
+    assert e.transliterate("고비리") == "Kobi-ri"
+    assert e.transliterate("교구동") == "Kyogu-dong"