--- esg.py-	2016-09-14 00:40:00.000000000 +0900
+++ esg.py	2016-09-14 23:00:00.000000000 +0900
@@ -243,6 +243,10 @@ def tree_type(lst):
 		e4 = tree_type( [ e[4] ] )[0]
 		e = [ e[0], e[1], e[2], e[3], e4 ]
 		return step(e, 1)
+	if e[0] == 'kwd' and e[1] in [ 'if', 'while', 'for' ]:
+		try_blk = lambda t: tree_type( [ t ] )[0] if t[:2] == [ 'br_s', '{' ] else t
+		e = e[:2] + [ try_blk(t) for t in e[2:] ]
+		return step(e, 1)
 	if e[0] == 'type' and len( lst[1:] ) > 0:
 		e = [ e[0], e[1], lst[1] ]
 		return step(e, 2)