Example usage janet:1:> (def buf @"ABCDE") @"ABCDE" janet:2:> (buffer/slice 0) error: bad slot #0, expected string|symbol|keyword|buffer, got 0 in buffer/slice in _thunk [repl] (tailcall) on line 2, column 1 janet:3:> (buffer/slice buf 0) @"ABCDE" janet:4:> (buffer/slice buf 0 1) @"A" janet:5:> (buffer/slice buf 0 -1) @"ABCDE" janet:6:> (buffer/slice buf 1 3) @"BC"