1ECHO: "--- empty"
2ECHO: []
3ECHO: []
4ECHO: []
5ECHO: []
6ECHO: "--- single elements"
7ECHO: [undef]
8ECHO: [true]
9ECHO: [3]
10ECHO: ["abc"]
11ECHO: [[0 : 1 : 10]]
12ECHO: "--- single vectors"
13ECHO: [1, 2, 3]
14ECHO: [[1, 2, 3]]
15ECHO: [[[1, 2, 3]]]
16ECHO: [[[1, 2, [3, 4], 5]]]
17ECHO: "--- multiple elements"
18ECHO: [3, 3]
19ECHO: [1, 2, 3]
20ECHO: [1, 2, 3, 4, 5]
21ECHO: [1, "text", false, [1 : 0.5 : 3]]
22ECHO: "--- vector / element"
23ECHO: [3, 4, undef]
24ECHO: [3, 4, 5, 6]
25ECHO: [3, 4, 5, 6, true]
26ECHO: [3, 4, "5", 6, "test"]
27WARNING: begin is greater than the end, but step is positive in file concat-tests.scad, line 33
28ECHO: [3, 4, true, 6, [4 : 1 : 3]]
29ECHO: "--- element / vector"
30ECHO: [3]
31ECHO: [3, 3, 4]
32ECHO: [true, 3, [4]]
33ECHO: ["9", 1, 2, 3]
34ECHO: [[6 : 2 : 9], 3, [4]]
35ECHO: "--- vector / vector"
36ECHO: [3, 4]
37ECHO: [[], 3, 4]
38ECHO: [[2, 4], 3, 4]
39ECHO: [5, 6, "d", [3, 4]]
40ECHO: [[1, 0, 0], [2, 0, 0], 3, 0, 0]
41ECHO: [[1, 0, 0], [2, 0, 0], [3, 0, 0]]
42ECHO: [[1, 0, 0], [2, 0, 0], [3, 0, 0], [4, 4, 4], [5, 5, 5]]
43ECHO: "--- recursive function"
44ECHO: [[1, 1], [2, 4], [3, 9], [4, 16], [5, 25], [6, 36], [7, 49], [8, 64], [9, 81], [10, 100]]
45