1	## our_shell: ysh
2
3	#### tuple literal and (( conflict
4	if ((0,0) < (0,1)) { echo yes }
5	## STDOUT:
6	yes
7	## END
8
9	#### Empty tuple
10	var t = ()
11	echo length=$[len(t)]
12	## STDOUT:
13	length=0
14	## END
15
16	#### Singleton tuple should be empty list
17
18	var t = [42]
19	echo len=$[len(t)]
20
21	#var t1 = 1,
22	var t2 = (42,)
23
24	## status: 2
25	## STDOUT:
26	len=1
27	## END