nicuveo

// this file is not valid Brainfuck as Brainfuck has no notion of comments
// and all symbols within comments would be interpreted as commands
// but let's pretend those are comments for the sake of this being readable

// given a stack of values [....,s06,s05,s04,s03,s02,s01,s00,d,n]
// this function rolls the stack `n` times at a depth `d`
// for instance:
//   input:  [5,4,3, 2,1,0, 3,2]
//   output: [5,4,3, 1,0,2]