Using arrays in packed structs

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I’ve also just stored byte arrays as their corresponding integer and used the functions std.mem.toBytes() and std.mem.bytesToValue() to change them to/from arrays as needed.

So in your case something like:

const BoardInfo = packed struct {
    /// Board ID. 8 * 8b
    board_id: u64,
    /// Serial Number. 6 * 8b
    serial_number: u48,
    /// Rest of the struct...
}

This was neater and easier to manage for my use case, but I think that just depends on what you’re doing.