bf_interpreter.rasel

1-0v
   >~v:W-:/?v1\01--
            :
            -
            -             >0@
 v   >      >06--::3>-:3-?^::\
> 1\1-\1            ^                                <
^>:"]"-:/?#v02\\v
                >01--::01--\:"["-:/?v:"]"-:/?v1\\
                ^                   >         1\\1\:?^1-1\01--
                ^                            >1\\1\01--1\
\v         <
^>:"["-:/?#v2\::\:?v1\1-\2
^                  >1\1-\2\02\v
                              >\::1-1\\:"["-:/?v:"]"-:/?v1\1-
                              ^                >         1\1-\1\01--1
                              ^                         >2\:?v1-2\1\1-
^v         <                                                 >-1-1
2
^>:","-:/?#v2\:~v1\\:--
 v         <    >"FOE"                   ,,,A,1@
^>:"."-:/?#v2\::\:,1\1-\
 v         <
^>:"<"-:/?#v2\1-::\:01--?v1\1-\
 v         <             >"dne epat",,,,,,,,A,1@
^>:">"-:/?#v2\01--
 v         <
^>:"+"-:/?#v2\::\01-->G1G//%1\1-\
 v         <
 >:"-"-:/?#v2\::\  1-^
           >"noitcurtsni dilavni"    ,,,,,,,A,1@

* stdin is splitted into bf code and bf stdin delimeted by EOF or ' '
* exit codes (only 0 and 1 are possible)
  * exit code 1 also prints the error message
  * all possible cases of exit code 1
    * read from EOF
    * going to the negative tape address
    * reaching an instruction other than [],.<>-+