1	#### tuple literal doesn't conflict with ((
2	if ((0,0) < (0,1)) { echo yes }
3	## STDOUT:
4	yes
5	## END
6
7	#### Empty tuple
8	var t = ()
9	echo length=$len(t)
10	## STDOUT:
11	length=0
12	## END
13
14	#### Singleton tuple
15	var t = tup(42)
16	echo "length = $[len(t)]"
17	echo "t[0] = $[t[0]]"
18
19	# NOT ALLOWED. Use tup() instead.
20	#var t1 = 1,
21	var t2 = (1,)
22	## status: 2
23	## STDOUT:
24	length = 1
25	t[0] = 42
26	## END