1const builtin = @import("builtin");
 2const expect = @import("std").testing.expect;
 3
 4const Node = struct {
 5    payload: i32,
 6    children: []Node,
 7};
 8
 9const NodeAligned = struct {
10    payload: i32,
11    children: []align(@alignOf(NodeAligned)) NodeAligned,
12};
13
14test "struct contains slice of itself" {
15    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
16    if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
17
18    var other_nodes = [_]Node{
19        Node{
20            .payload = 31,
21            .children = &[_]Node{},
22        },
23        Node{
24            .payload = 32,
25            .children = &[_]Node{},
26        },
27    };
28    var nodes = [_]Node{
29        Node{
30            .payload = 1,
31            .children = &[_]Node{},
32        },
33        Node{
34            .payload = 2,
35            .children = &[_]Node{},
36        },
37        Node{
38            .payload = 3,
39            .children = other_nodes[0..],
40        },
41    };
42    const root = Node{
43        .payload = 1234,
44        .children = nodes[0..],
45    };
46    try expect(root.payload == 1234);
47    try expect(root.children[0].payload == 1);
48    try expect(root.children[1].payload == 2);
49    try expect(root.children[2].payload == 3);
50    try expect(root.children[2].children[0].payload == 31);
51    try expect(root.children[2].children[1].payload == 32);
52}
53
54test "struct contains aligned slice of itself" {
55    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
56    if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
57
58    var other_nodes = [_]NodeAligned{
59        NodeAligned{
60            .payload = 31,
61            .children = &[_]NodeAligned{},
62        },
63        NodeAligned{
64            .payload = 32,
65            .children = &[_]NodeAligned{},
66        },
67    };
68    var nodes = [_]NodeAligned{
69        NodeAligned{
70            .payload = 1,
71            .children = &[_]NodeAligned{},
72        },
73        NodeAligned{
74            .payload = 2,
75            .children = &[_]NodeAligned{},
76        },
77        NodeAligned{
78            .payload = 3,
79            .children = other_nodes[0..],
80        },
81    };
82    const root = NodeAligned{
83        .payload = 1234,
84        .children = nodes[0..],
85    };
86    try expect(root.payload == 1234);
87    try expect(root.children[0].payload == 1);
88    try expect(root.children[1].payload == 2);
89    try expect(root.children[2].payload == 3);
90    try expect(root.children[2].children[0].payload == 31);
91    try expect(root.children[2].children[1].payload == 32);
92}