From 35ace3e74c1e71d158c2b01c2f6a04adc4b72e2b Mon Sep 17 00:00:00 2001
From: giles <giles.bradshaw@rose-ash.com>
Date: Tue, 5 May 2026 12:45:14 +0000
Subject: [PATCH] =?UTF-8?q?HS:=20fix=20CSS=20query=20template=20tokenizati?=
 =?UTF-8?q?on=20=E2=80=94=20<${...}/>=20treated=20as=20selector?=
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Add '$' to the set of characters that trigger selector tokenization after
'<'. Previously only letters, '.', '#', '[', '*', ':' were recognized.
Now <${"expr"}/> is emitted as a single selector token instead of being
split into op/<brace-open/string/brace-close/op/op tokens that caused the
parser to spiral through comparison-expression parsing (>30s timeout).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 lib/hyperscript/tokenizer.sx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/hyperscript/tokenizer.sx b/lib/hyperscript/tokenizer.sx
index 4824b51d..a8ac771b 100644
--- a/lib/hyperscript/tokenizer.sx
+++ b/lib/hyperscript/tokenizer.sx
@@ -538,7 +538,8 @@
                     (= (hs-peek 1) "#")
                     (= (hs-peek 1) "[")
                     (= (hs-peek 1) "*")
-                    (= (hs-peek 1) ":")))
+                    (= (hs-peek 1) ":")
+                    (= (hs-peek 1) "$")))
                 (do (hs-emit! "selector" (read-selector) start) (scan!))
                 (and (= ch ".") (< (+ pos 1) src-len) (= (hs-peek 1) "."))
                 (do (hs-emit! "op" ".." start) (hs-advance! 2) (scan!))