Add support for manual functions

Author: lxsmnsyc

packages/core/babel/core/memo-variable.ts

@@ -11,7 +11,11 @@ export function memoVariable(
   stateIdentifier: t.Expression,
   optionsIdentifier?: t.Expression,
 ): t.VariableDeclarator {
-  const normalIdentifier = t.arrowFunctionExpression([], stateIdentifier);
+  const normalIdentifier =
+    t.isArrowFunctionExpression(stateIdentifier) ||
+    t.isFunctionExpression(stateIdentifier)
+      ? stateIdentifier
+      : t.arrowFunctionExpression([], stateIdentifier);
 
   const exprs: t.Expression[] = [normalIdentifier];
 

packages/core/babel/transform-ctf.ts

@@ -378,7 +378,12 @@ const CTF_TRAVERSE: babel.Visitor<State> = {
             t.expressionStatement(
               t.callExpression(
                 getImportIdentifier(state, path, 'createEffect', 'solid-js'),
-                [t.arrowFunctionExpression([], argument)],
+                [
+                  t.isArrowFunctionExpression(argument) ||
+                  t.isFunctionExpression(argument)
+                    ? argument
+                    : t.arrowFunctionExpression([], argument),
+                ],
               ),
             ),
           );