Just for fun, I wrote a BF interpreter (without I/O) in Haskell:
https://tio.run/##rVZtb9s2EP7OX3ERDESC680dsH0wKmNo9yUDBhTrvhlCykq0RVSWNIqOF2T57endkXqz5SYIKsOQ@PDu4b3xyFw2X1VRPD3pfV0ZC/8eZKG3WmXwh7Typ79kDbIBfAlh72sFn6xMv4KEGDYycdBNaUksJilWQID@QuylTfP3BjWUbWC1Qm2jyx0s1iyDL0fnB47oRCsI4BZ/jl3ta3t/IhCmuTSwAqMaG4EuM/UfNEwbC4BUNgpYotrC9eaa1hnrkx6ETm8Ob6P2e@VYIiQZPdcJkxQKtZgJPboZavzNhsRucKrtH12yP7psFAbdLTgmm13QxGegOdbRz2k@43ln/inD7QvC5twVGZYN/COxLmL3esBQbe0nnSmqgA0mOTk38A2kB2NUaT9gMZIc1c@ElNG7/DmuRyEwOlaWKZZrXh2dGcdcGYXCDSEhQwWkYChTwSaA@RzCQ3msTNbAjDJbO9EZenqnDFZREbFQEDphnk0ZC6Igwuz3SiZyeBKQLSkZyy…