&& c.table.cur_concrete_types.len == 0 {
         pos := type_sym.name.last_index('.') or { -1 }
         first_letter := type_sym.name[pos + 1]
-        if !first_letter.is_capital() && type_sym.kind != .placeholder {
-            c.error('cannot initialize builtin type `$type_sym.name`', node.pos)
+        if !first_letter.is_capital() && type_sym.kind != .placeholder
+            && !type_sym.name.starts_with('_VAnonStruct') {
+            s := type_sym.name
+            x := s.starts_with('_')
+
+            c.error('cannot initialize builtin type1 $x  "$s" "${s[..4]}" `$type_sym.name`',
+                node.pos)
         }
     }
     if type_sym.kind == .sum_type && node.fields.len == 1 {

             node = p.map_init()
             p.check(.rcbr)
         }
+        .key_struct {
+            // Anonymous struct
+            p.next()
+            return p.struct_init('', false)
+        }
         .key_fn {
             if p.expecting_type {
                 // Anonymous function type

 }
 
 fn test_anon() {
-    empty_book := Book{} // author:struct{'sdf', 23}}
+    empty_book := Book{}
     assert empty_book.author.age == 0
     assert empty_book.author.name == ''
-
     println(empty_book.author.age)
+
+    book := Book{ author:struct{'sdf', 23}}
 }