Crate subslice_offset
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A tiny utility crate for finding the offset of a subslice within another slice. Note that this is not done through pattern matching but with pointer arithmetic instead.
To use, simply include this crate and use the SubsliceOffset trait. The subslice_offset method should then appear on slices.
I do not take any credit for this crate, full credit goes to https://stackoverflow.com/a/50781657