--- esL.py-	2016-09-08 01:00:00.000000000 +0900
+++ esL.py	2016-09-08 02:00:00.000000000 +0900
@@ -173,6 +173,7 @@ def tree_kwd(lst, kdic):
 		return lst
 	e = lst[0]
 	step = lambda e, i: [ e ] + tree_kwd( lst[i:], kdic )
+	top_is = lambda lst, k, v: len(lst) > 0 and lst[0][:2] == [ k, v ]
 	if type(e) is not list:
 		return step(e, 1)
 	(k, v) = e[:2]
@@ -183,6 +184,19 @@ def tree_kwd(lst, kdic):
 		if v in [ 'return' ] and len( lst[1:] ) > 0:
 			e = [ k, v, lst[1] ]
 			return step(e, 2)
+		if v == 'else' and len( lst[1:] ) > 0:
+			r = tree_kwd( lst[1:], kdic )
+			return [ [ k, v, r[0] ] ] + r[1:]
+		if v == 'if' and len( lst[2:] ) > 0:
+			if lst[1][:2] != [ 'br_s', '(' ]:
+				err_exit("not found '(' after 'if'")
+			r = tree_kwd( lst[2:], kdic )
+			e = [ k, v, lst[1], r.pop(0) ]
+			if top_is(r, 'etc', ';'):
+				r.pop(0)
+			if top_is(r, 'kwd', 'else'):
+				e += [ r.pop(0)[2] ]
+			return [ e ] + r
 	e = e[:2] + tree_kwd( e[2:], kdic )
 	return step(e, 1)
 
@@ -381,7 +395,7 @@ def do_expr(expr, info):
 	if k in [ 'type', 'fproto', 'etc' ]:  # do nothing !!!
 		return None
 
-	warn_no_sup('do_expr', 'k', k)
+	warn_no_sup('do_expr', '[k, v]', [k, v])
 	return None
 
 def do_blk(blk, info):