OsTag

    pub const OsTag = enum(u6) {
        freestanding,
        other,
        contiki,
        fuchsia,
        hermit,
        managarm,
        haiku,
        hurd,
        illumos,
        linux,
        plan9,
        rtems,
        serenity,
        dragonfly,
        freebsd,
        netbsd,
        openbsd,
        driverkit,
        ios,
        maccatalyst,
        macos,
        tvos,
        visionos,
        watchos,
        windows,
        uefi,
        @"3ds",
        wiiu,
        @"switch",
        gba,
        psx,
        ps3,
        ps4,
        ps5,
        psp,
        vita,
        emscripten,
        wasi,
        amdhsa,
        amdpal,
        cuda,
        mesa3d,
        nvcl,
        opencl,
        opengl,
        vulkan,
        tios,
        ashetos,

        default,

        pub fn init(x: ?std.Target.Os.Tag) @This() {
            return switch (x orelse return .default) {
                inline else => |tag| @field(@This(), @tagName(tag)),
            };
        }

        pub fn unwrap(this: @This()) ?std.Target.Os.Tag {
            return switch (this) {
                inline else => |tag| @field(std.Target.Os.Tag, @tagName(tag)),
                .default => null,
            };
        }
    }