Propagate prec.right

Author: eed3si9n

grammar.js

@@ -3,6 +3,7 @@ const PREC = {
   using_directive: 2,
   control: 1,
   stable_type_id: 2,
+  then: 2,
   while: 2,
   assign: 3,
   case: 3,
@@ -1134,14 +1135,17 @@ module.exports = grammar({
       ),
 
     _if_condition: $ =>
-      choice(
-        $.parenthesized_expression,
-        $._then_condition,
+      prec.right(
+        PREC.then,
+        choice(
+          $.parenthesized_expression,
+          $._then_condition,
+        )
       ),
 
     _then_condition: $ =>
       prec.right(
-        PREC.control,
+        PREC.then,
         seq($._indentable_expression, "then"),
       ),