I would add another to the list, which is languages where every expression yields zero or more values, particularly `jq`. there are some antecedents in Icon and xquery, but these generally require explicitly opting into either production or consumption of value streams, where jq does this stream processing automatically from the ground up. (icon requires use of a suspend and needs an every clause to walk the generated values, xquery requires explicit 'for' statements over streams as many builtin operators fail on value streams)
in jq, the comma separates expressions, which independently yield values. a span of such expressions is called a 'filter', since they are always run by passing values from the prior filter into them (with the initial values sourcing from json objects on stdin, or an implicit null if you pass -n to the program).
$ jq -nc ' def x: "a", "b", "c" ; def y: 1, 2, 3 ; x, y '
"a"
"b"
"c"
1
2
3
$ jq -c '. + 10, . + 20' $ jq -nc ' def x: "a", "b", "c" ; def y: 1, 2, 3 ; [x,y] '
["a","b","c",1,2,3]
$ jq -nc ' def x: "a", "b", "c" ; def y: 1, 2, 3 ; {"foo": x, "bar": y} '
{"foo":"a","bar":1}
{"foo":"a","bar":2}
{"foo":"a","bar":3}
{"foo":"b","bar":1}
{"foo":"b","bar":2}
{"foo":"b","bar":3}
{"foo":"c","bar":1}
{"foo":"c","bar":2}
{"foo":"c","bar":3}
$ jq -nc ' 1,2,3 | 10 + . '
11
12
13
$ jq -nc ' 1,2,3 | (10 + .) * . '
11
24
39
$ jq -nc ' (1,2,3) as $A | $A + $A '
2
4
6
for example, this runs `. + 100` parameters context, with `.` as the 10,20,30 passed to it:
$ jq -nc ' def f($t): 1,2,3|$t ; 10,20,30|f(. + 100) '
110
110
110
120
120
120
130
130
130
$ jq -nc ' def f(t): 1,2,3|t ; 10,20,30|f(. + 100) '
101
102
103
101
102
103
101
102
103
$ jq -nc ' def m(todo): [.[]|todo] ; [1,2,3]|m(. * 10) '
[10,20,30]