:art: handle paren exp

diff --git a/ast b/ast
index 56302d84310c70cbf2356c609138b4084b042128..ad317398e44e3b8c70b1695acc1991c0778644c6 160000 (submodule)
--- a/ast
+++ b/ast
@@ -1 +1 @@
-Subproject commit 56302d84310c70cbf2356c609138b4084b042128
+Subproject commit ad317398e44e3b8c70b1695acc1991c0778644c6