unfuck/src/optimisers/setZero.js

A brainfuck to Javascript compiler with optimizations.

function setZero ( settings, ast ) {
  return ast.reduce(( acc, ins ) => {
    if (ins.is === 'IF') {
      if ((ins.body.length === 1) && (ins.body[0].is === 'SFT') && ((ins.body[0].body === -1) || (ins.body[0].body === 1))) {
        acc.push({
          is: 'SET',
          body: 0
        });
      } else {
        acc.push({
          is: 'IF',
          body: setZero(settings, ins.body)
        });
      }
    } else {
      acc.push(ins);
    }
    return acc;
  }, [])
}

module.exports = setZero;