MatchingLoopFinder.strict

has Instruction
has instructions
has LoopIfNonZero Instruction
has JumpBackIfNonZero Instruction
GoToMatchingLoopBracket(direction Number, mutable index Number)
	let loopDepth = direction
	for Range(index + direction, instructions.Length)
		if instructions(index) is LoopIfNonZero
			loopDepth += 1
		if instructions(index) is JumpBackIfNonZero
			loopDepth -= 1
		if loopDepth is 0
			return 0
	loopDepth