1const std = @import("std");
2const assert = std.debug.assert;
3const expect = std.testing.expect;
4const builtin = @import("builtin");
5const native_arch = builtin.target.cpu.arch;
6const maxInt = std.math.maxInt;
7
8const Foo = struct {
9 x: u32,
10 y: u32,
11 z: u32,
12};
13
14test "@alignOf(T) before referencing T" {
15 comptime assert(@alignOf(Foo) != maxInt(usize));
16 if (native_arch == .x86_64) {
17 comptime assert(@alignOf(Foo) == 4);
18 }
19}
20
21test "comparison of @alignOf(T) against zero" {
22 const T = struct { x: u32 };
23 try expect(!(@alignOf(T) == 0));
24 try expect(@alignOf(T) != 0);
25 try expect(!(@alignOf(T) < 0));
26 try expect(!(@alignOf(T) <= 0));
27 try expect(@alignOf(T) > 0);
28 try expect(@alignOf(T) >= 0);
29}
30
31test "correct alignment for elements and slices of aligned array" {
32 if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
33
34 var buf: [1024]u8 align(64) = undefined;
35 var start: usize = 1;
36 var end: usize = undefined;
37 _ = .{ &start, &end };
38 try expect(@alignOf(@TypeOf(buf[start..end])) == @alignOf(*u8));
39 try expect(@alignOf(@TypeOf(&buf[start..end])) == @alignOf(*u8));
40 try expect(@alignOf(@TypeOf(&buf[start])) == @alignOf(*u8));
41}
42
43test "@alignOf(anyerror!noreturn)" {
44 try expect(@alignOf(anyerror!noreturn) == @alignOf(anyerror));
45 try expect(@alignOf(anyerror!anyerror!noreturn) == @alignOf(anyerror));
46}