--- esR.py-	2016-09-09 01:20:00.000000000 +0900
+++ esR.py	2016-09-09 02:00:00.000000000 +0900
@@ -3,9 +3,6 @@
 import sys
 import yaml
 
-def printf(s, v):
-	sys.stdout.write(s % v)
-
 def is_num(s):
 	try:
 		float(s)
@@ -163,7 +160,7 @@ def tree_op(lst, ops):
 	if k == 'op':
 		return tree_op1(lst, ops, k, v)
 
-	if k in [ 'num', 'name', 'arr', 'fcall', 'br_s' ] and len( lst[1:] ) > 0:
+	if k in [ 'num', 'name', 'arr', 'fcall', 'br_s', 'str' ] and len( lst[1:] ) > 0:
 		e1 = lst[1]
 		(k1, v1) = e1[:2]
 		if k1 == 'op':
@@ -254,8 +251,8 @@ def es_split(s):
 	ops_flat = reduce(f, ops, [])
 
 	kdic = {
-		'cmt_s' : [ '/*', '//', '#', '/*-->|', '|<--*/' ],
-		'cmt_e' : [ '*/' ],
+		'cmt_s' : [ '/*', '//|-->', '//', '#', '/*-->|', '|<--*/' ],
+		'cmt_e' : [ '*/', '//<--|' ],
 		'qt' : [ '"', "'" ],
 		'esc' : { '\\n':'\n', '\\t':'\t', '\\"':'"', "\\'":"'", '\\\\':'\\' },
 		'br_s' : [ '(', '[', '{' ],
@@ -461,7 +458,8 @@ def do_fcall(name, args, info):
 	f = lambda (k, nm): k == 'fdef' and nm == name
 	fdef = next( ( e for e in lst if f( e[:2] ) ), None )
 	if fdef is None:
-		func = get_sys_func(name)
+		v = get_env(info).get(name)
+		func = v if v else get_sys_func(name)
 		if func:
 			return func(*args)
 		err_exit("not found fdef '{}'".format(name))