1const expect = @import("std").testing.expect;
 2const builtin = @import("builtin");
 3
 4const Foo = struct {
 5    a: void,
 6    b: i32,
 7    c: void,
 8};
 9
10test "compare void with void compile time known" {
11    comptime {
12        const foo = Foo{
13            .a = {},
14            .b = 1,
15            .c = {},
16        };
17        try expect(foo.a == {});
18    }
19}
20
21test "iterate over a void slice" {
22    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
23    if (builtin.zig_backend == .stage2_riscv64) return error.SkipZigTest;
24    if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
25
26    var j: usize = 0;
27    for (times(10), 0..) |_, i| {
28        try expect(i == j);
29        j += 1;
30    }
31}
32
33fn times(n: usize) []const void {
34    return @as([*]void, undefined)[0..n];
35}
36
37test "void optional" {
38    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
39    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
40
41    var x: ?void = {};
42    _ = &x;
43    try expect(x != null);
44}
45
46test "void array as a local variable initializer" {
47    var x = [_]void{{}} ** 1004;
48    _ = &x[0];
49    _ = x[0];
50}
51
52const void_constant = {};
53test "reference to void constants" {
54    var a = void_constant;
55    _ = &a;
56}