--- esn.py-	2016-09-18 00:00:00.000000000 +0900
+++ esn.py	2016-09-19 00:00:00.000000000 +0900
@@ -291,7 +291,7 @@ def es_split(s):
 		[ 2, '>', [ '|' ] ],
 		[ 2, '>', [ '&&' ] ],
 		[ 2, '>', [ '||' ] ],
-		[ 3, '<', [ '?', ':' ] ],
+		[ 2, '<', [ '?', ':' ] ],  # term 3  :-p)
 		[ 2, '<', [ '=', '+=', '-=', '*=', '/=', '%=', '&=', '|=', '^=', '>>=', '<<=' ] ],
 		[ 2, '>', [ ',' ] ], # ...
 	]
@@ -436,6 +436,8 @@ def do_op1(v, a, info):
 def do_op2(v, a, b, info):
 	oa = a
 	a = do_expr(a, info)
+	if v == '?':
+		return do_expr(b[2] if a else b[3], info)
 	b = do_expr(b, info)
 	if v == '=':
 		return do_set(oa, b, info)