Challenge: Make a data type for holding one of 8 directions allowing increment and overflow

[Richard (Rikki) Andrew Cattermole]

On 13/03/2024 11:00 AM, Liam McGillivray wrote:
> I'm not familiar with the syntax of the line |value &= 7;|. Is it 
> equivalent to writing |value = value % 7;|?

& is a bitwise and.

LSB 123456789 MSB

& 7

LSB 123000000 MSB

> Anyway, you used an int, but I used an array of 3 bools. I'm guessing 
> that mine uses less memory, but I'm not sure how memory it adds when 
> it's a struct with functions.

Due to alignment, it'll probably use just as much.

Mine only needs a single ``byte``, at 7 bits it's more than enough.

But ``int`` doesn't make much difference unless you are packing 
instances together ``align(0):`` and realistically cpus are optimized 
for 32bits not 8.