A very bad brainf-ck interpreter

It has a cool visualizer tho.

Usage: brainf-ck-rs [program path] <options>

Arguments:
    [program path]              The path of the program to execute

Options:
    -m, --max-steps [steps]     Maximum number of steps before terminating, useful
                                when the program doesn't terminate on its own
    -v, --visualizer            Shows a visualizer that displays the operations performed
                                and the memory tape while executing the program
    -d, --delay [delay]         Add a delay (in ms) between each step
    -h, --help                  Show this help

Examples:
    brainf-ck-rs examples/helloworld.b
    brainf-ck-rs examples/e.b --max-steps 1000000
    brainf-ck-rs examples/print_input.b --visualizer --delay 50

Example: computing e

Thanks to Daniel B. Cristofani it can compute the irrational number e with arbitrary precision (it's so coool):

$ brainf-ck-rs examples/e.b --max-steps 2000000

performed 2000000 operations in 7.281ms
output: 2.718281828459045235360287471352662497

Here with 2943 significant digits:

$ brainf-ck-rs examples/e.b --max-steps 10000000000

performed 10000000000 operations in 32247.658ms
output: 2.71828182845904523536028747135266249775724709369995957496696762772407663035354759457138217852516642742746639193200305992181741359662904357290033429526059563073813232862794349076323382988075319525101901157383418793070215408914993488416750924476146066808226480016847741185374234544243710753907774499206955170276183860626133138458300075204493382656029760673711320070932870912744374704723069697720931014169283681902551510865746377211125238978442505695369677078544996996794686445490598793163688923009879312773617821542499922957635148220826989519366803318252886939849646510582093923982948879332036250944311730123819706841614039701983767932068328237646480429531180232878250981945581530175671736133206981125099618188159304169035159888851934580727386673858942287922849989208680582574927961048419844436346324496848756023362482704197862320900216099023530436994184914631409343173814364054625315209618369088870701676839642437814059271456354906130310720851038375051011574770417189861068739696552126715468895703503540212340784981933432106817012100562788023519303322474501585390473041995777709350366041699732972508868769664035557071622684471625607988265178713419512466520103059212366771943252786753985589448969709640975459185695638023637016211204774272283648961342251644507818244235294863637214174023889344124796357437026375529444833799801612549227850925778256209262264832627793338656648162772516401910590049164499828931505660472580277863186415519565324425869829469593080191529872117255634754639644791014590409058629849679128740687050489585867174798546677575732056812884592054133405392200011378630094556068816674001698420558040336379537645203040243225661352783695117788386387443966253224985065499588623428189970773327617178392803494650143455889707194258639877275471096295374152111513683506275260232648472870392076431005958411661205452970302364725492966693811513732275364509888903136020572481765851180630364428123149655070475102544650117272115551948668508003685322818315219600373562527944951582841882947876108526398139559900673764829224437528718462457803619298197139914756448826260390338144182326251509748279877799643730899703888677822713836057729788241256119071766394650706330452795466185509666618566470971134447401607046262156807174818778443714369882185596709591025968620023537185887485696522000503117343920732113908032936344797273559552773490717837934216370120500545132638354400018632399149070547977805669785335804896690629511943247309958765523681285904138324116072260299833053537087613893963917795745401613722361878936526053815584158718692553860616477983402543512843961294603529133259427949043372990857315802909586313826832914771163963370924003168945863606064584592512699465572483918656420975268508230754425459937691704197778008536273094171016343490769642372229435236612557250881477922315197477806056967253801718077636034624592787784658506560507808442115296975218908740196609066518035165017925046195013665854366327125496399085491442000145747608193022120660

Visualizer

Here is a preview of what the visualizer looks like:

Multiple memory tapes

A system, added in version 0.1.10, allows working with up to 10 brainf-ck memory tapes at the same time by using digits from 0 to 9 in the brainf-ck program to switch between tapes.

In the brainf-ck code, use any digit between 0 and 9 to switch to the associated tape. To copy the value of the cell on the previous tape, add : before the digit.