HS: implement morph command — tokenizer keyword, parser, compiler, runtime HTML-fragment parser

Adds the missing `morph <target> to <html>` command. Runtime includes a small HTML fragment parser that applies the outer element's attributes to the target, rebuilds children, and re-activates hyperscript on the new subtree. Other hyperscript fixes (^ attr ref, dom-ref keyword, pick keyword, between in am/is, prop-is removal) from parallel work are bundled along. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-22 11:49:36 +00:00
parent ef5faa6b54
commit 5b0c8569a8
4 changed files with 735 additions and 68 deletions
--- a/lib/hyperscript/tokenizer.sx
+++ b/lib/hyperscript/tokenizer.sx
@@ -117,6 +117,7 @@
    "first"
    "last"
    "random"
+    "pick"
    "empty"
    "clear"
    "swap"
@@ -173,11 +174,16 @@
    "default"
    "halt"
    "precedes"
+    "precede"
+    "follow"
    "follows"
    "ignoring"
    "case"
+    "changes"
    "focus"
-    "blur"))
+    "blur"
+    "dom"
+    "morph"))

 (define hs-keyword? (fn (word) (some (fn (k) (= k word)) hs-keywords)))

@@ -472,6 +478,14 @@
                  (hs-advance! 1)
                  (hs-emit! "attr" (read-ident pos) start)
                  (scan!))
+                (and
+                  (= ch "^")
+                  (< (+ pos 1) src-len)
+                  (hs-ident-char? (hs-peek 1)))
+                (do
+                  (hs-advance! 1)
+                  (hs-emit! "hat" (read-ident pos) start)
+                  (scan!))
                (and
                  (= ch "~")
                  (< (+ pos 1) src-len)