1 files changed, 21 insertions, 0 deletions
diff --git a/lib/react-compiler-runtime/index.js b/lib/react-compiler-runtime/index.js
new file mode 100644
index 000000000..44f80e0c9
--- /dev/null
+++ b/lib/react-compiler-runtime/index.js
@@ -0,0 +1,21 @@
+const React = require('react')
+const $empty = Symbol.for('react.memo_cache_sentinel')
+/**
+ * DANGER: this hook is NEVER meant to be called directly!
+ *
+ * Note that this is a temporary userspace implementation of this function
+ * from React 19. It is not as efficient and may invalidate more frequently
+ * than the official API. Please upgrade to React 19 as soon as you can.
+ **/
+export function c(size) {
+  // eslint-disable-next-line react-hooks/rules-of-hooks
+  return React.useState(() => {
+    const $ = new Array(size)
+    for (let ii = 0; ii < size; ii++) {
+      $[ii] = $empty
+    }
+    // @ts-ignore
+    $[$empty] = true
+    return $
+  })[0]
+}