Brainwhirl
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Brainwhirl is a BF derivative invented by User:Ttulka. It can be considered a turning tarpit, as its execution is based on spinning a wheel. In Brainwhirl, each instruction means "power" that rotates the wheel by a specific number of steps, relative to its current orientation. Like a standard wheel, it rotates clockwise, meaning that the following instruction is determined by moving backward.
The wheel's instructions follow the standard Brainfuck commands in this clockwise sequence: >, <, +, -, ., ,, [, and ].
Brainwhirl only uses whole numbers from 0 to 7 as instructions, with no other symbols permitted.
Examples
Cat
BF: +[>,.<] BW: 6463132
Move value
BF: >>[-]<<[->>+<<] BW: 002346033306102
Hello, World!
BF: +[-->-[>>+>-----<<]<--<---]>-.>>>+.>>..+++[.>]<<<<.+++.------.<<-.>>>>+. BW: 643035560625000020266026004757400664040200424160005200610000073067400066
Brainwhirl to BF transpiler in JavaScript
const wheel = [">", "<", "+", "-", ".", ",", "[", "]"]
let pc = 0
const bf = input.split("").map(i => {
pc = (wheel.length + pc - i) % wheel.length
return wheel[pc]
}).join('')
The variable input contains a string with Brainwhirl code.