Eats up swift style (recursive multiline) comments

comment-monster.py

# Simulated just matched /*
stream = " /* /* /* /* */ */ */ */ /* */  /* */ */  /**/"
# stream = "/*/*/*/**/*/*/*//**//**/*/  /**/"
# stream = """
# /*
# 	Some random comment
# */

# // More text
# var i = "5";
# """

# Simulates my input stream
def input():
	global stream
	nextChar = stream[0]
	stream = stream[1:]
	return nextChar

# Constants
SLASH = "/"
STAR = "*"

# Variables
previousChar = None
commentLevel = 1 # Change to 0 to match entire comments "/*  */", otherwise assumes we've already matched /* with the lexer
	
# Go until no more input
while True:
	try: # Next Character
		char = input()
	except Exception, e:
		break # No More Input
		
	# If a /
	if char in SLASH:
		# If last char was a *, we just found a */
		if previousChar is STAR:
			# Don't match the opposite rule right away ie. */*
			previousChar = None
			# Rising up
			commentLevel -= 1
			# If commentLevel is 0, break completly, we're done
			if commentLevel is 0:
				print "we're done and this is left in the input stream, '" + stream + "'"
				break
		else:
			previousChar = char
	# Else a *
	elif char in STAR:
		# If last char was a /, we just found a /*
		if previousChar is SLASH:
			# Don't match the opposite rule right away ie. /*/
			previousChar = None
			# Going deeper
			commentLevel += 1
		else:
			previousChar = char
	else: # Any old character
		previousChar = char
		continue

if commentLevel is not 0:
	print "the comment was not finished within our available input"