zig/test/cases/alignof.zig

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const std = @import("std");
const assert = std.debug.assert;
const builtin = @import("builtin");
const maxInt = std.math.maxInt;
const Foo = struct.{
x: u32,
y: u32,
z: u32,
};
test "@alignOf(T) before referencing T" {
comptime assert(@alignOf(Foo) != maxInt(usize));
if (builtin.arch == builtin.Arch.x86_64) {
comptime assert(@alignOf(Foo) == 4);
}
}