Braincrash

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Braincrash is a useless programming language invented by User:TehZ, based on Brainfuck. It is made to only have 2 symbols (or you could call them commands), one of which is no-op, the other execute. It is an example of a turning tarpit.

So what is it?

Basically, it has a "command pointer" (CP, not IP), which is incremented after each command (including no-op). It points to one of the eight BF commands. It is sorted in this way:

+-><.,[]

The two commands available are " " and "!". " " is a no-op, while "!" executes the command pointed to by CP. After each step, the program increments the CP by one, and "mods" it by eight.

How am I supposed to write in this language?

You aren't, but here is a trick anyway. You start out with a file containing a line filled with "+-><.,[]" like this:

+-><.,[]+-><.,[]+-><.,[]+-><.,[]+-><.,[]+-><.,[]+-><.,[]+-><.,[](etc)

Then you add a line before that and start pressing space until you are over a BF character you want to use. When you are over one, press "!" and repeat. For example, when writing a cat program, here is the result:

     !!     !! !
+-><.,[]+-><.,[](removed)

Then you remove the second line, and you are finished.

Cat

     !!     !! !

Implementation

This short Lua script converts braincrash into brainfuck. It treats all characters that aren't "!" as spaces, however:

io.stdin:read("*line"):gsub("()!", (function(loc) io.stdout:write(("+-><.,[]"):sub((loc-1)%8+1,(loc-1)%8+1)) end))

This is a BRB program that converts Braincrash into Brainfuck:

;!+-><.,[];{#%%[^V;@v;>%}#{?Y;®%%v;#]_

This is a Python program that converts Brainfuck into Braincrash

source = #Your code goes here
converted = ""
wheel = [">", "<", "+", "-", ".", ",", "[","]"]
i=0
x=0 
while i < len(source):
    if wheel.count(source[i])<1:
        source = source[:i]+source[i+1:]
    elif wheel[x]==source[i]:
        converted+="!"
        i+=1
    else:
        converted += " "
    x+=1
    if x >= 8:
        x -= 8
print(converted)