Brainfuck: Free Version

Brainfuck: Free Version (or brainfuck: free version) is a subset of brainfuck premium (or Brainfuck Premium), which is essentially brainfuck. It is made as part of this repost chain on wasteof.

Definition

In the post, it is written:

brainfuck premium:

without it you cant:^[sic]

• use +, [], and ,

Thus, the commands of brainfuck: free version are:

Command	Description
>	Move the pointer to the right
<	Move the pointer to the left
-	Decrement the memory cell at the pointer
.	Output the character signified by the cell at the pointer

Computational class

Since brainfuck: free version doesn't have any control loop whatsoever, this language always halts, making it not Turing complete.

Interpreter

Trivial brainfuck substitution style interpreter.

#!/usr/bin/ruby
eval 'm=Hash.new(p=0);'+ARGF.read.gsub(
        /./,
        '>'=>'p+=1;',
        '<'=>'p-=1;',
#       '+'=>'m[p]+=1;',
        '-'=>'m[p]-=1;',
#       '['=>'(',
#       ']'=>')while((m[p]&=255)!=0);',
#       ','=>'m[p]=STDIN.getbyte if !STDIN.eof;',
        '.'=>'putc m[p];')