def match(tokenizer: Tokenizer, baseword_order: HackersDelightMatcher.WordOrder, pointer):
tokenizer.take_snapshot()
if not tokenizer.reached_end() and tokenizer.consume() == Keywords.IO_CHAR:
if baseword_order == HackersDelightMatcher.WordOrder.HD:
return OutputCharCell(pointer)
elif baseword_order == HackersDelightMatcher.WordOrder.DH:
return InputCharCell(pointer)
else:
tokenizer.rollback_snapshot()
return False
def match(tokenizer: Tokenizer, baseword_order: HackersDelightMatcher.WordOrder, pointer):
tokenizer.take_snapshot()
if not tokenizer.reached_end() and tokenizer.consume() == Keywords.COND:
if baseword_order == HackersDelightMatcher.WordOrder.HD:
return Condition(pointer)
elif baseword_order == HackersDelightMatcher.WordOrder.DH:
return JumpBack(pointer)
else:
tokenizer.rollback_snapshot()
return False
def match(tokenizer: Tokenizer,
baseword_order: HackersDelightMatcher.WordOrder, pointer):
tokenizer.take_snapshot()
if not tokenizer.reached_end() and tokenizer.consume(
) == Keywords.MV_PTR:
if baseword_order == HackersDelightMatcher.WordOrder.HD:
return PointerRight(pointer)
elif baseword_order == HackersDelightMatcher.WordOrder.DH:
return PointerLeft(pointer)
else:
tokenizer.rollback_snapshot()
return False
def match(tokenizer: Tokenizer):
tokenizer.take_snapshot()
first_word = HackersDelightMatcher.match_baseword(tokenizer)
second_word = HackersDelightMatcher.match_baseword(tokenizer) if first_word else False
couple = (first_word, second_word)
if couple == (Keywords.HACK, Keywords.DEL):
tokenizer.purge_snapshot()
return HackersDelightMatcher.WordOrder.HD
if couple == (Keywords.DEL, Keywords.HACK):
tokenizer.purge_snapshot()
return HackersDelightMatcher.WordOrder.DH
tokenizer.rollback_snapshot()
return False
def match(tokenizer: Tokenizer):
tokenizer.take_snapshot()
first_word = HackersDelightMatcher.match_baseword(tokenizer)
second_word = HackersDelightMatcher.match_baseword(
tokenizer) if first_word else False
couple = (first_word, second_word)
if couple == (Keywords.HACK, Keywords.DEL):
tokenizer.purge_snapshot()
return HackersDelightMatcher.WordOrder.HD
if couple == (Keywords.DEL, Keywords.HACK):
tokenizer.purge_snapshot()
return HackersDelightMatcher.WordOrder.DH
tokenizer.rollback_snapshot()
return False
def match_baseword(tokenizer: Tokenizer) -> Keywords:
token_word = ''
matched_word = ''
pointer = tokenizer.pointer_at()
auxiliary_keywords = Keywords.HACK_AUX + Keywords.DEL_AUX
all_keywords = (Keywords.HACK, Keywords.DEL) + auxiliary_keywords
while not tokenizer.reached_end():
one_matched = False
token_word += tokenizer.peek()
for word in all_keywords:
if word.startswith(token_word):
if not one_matched:
tokenizer.consume()
one_matched = True
if word == token_word:
if matched_word:
tokenizer.purge_snapshot()
tokenizer.take_snapshot()
matched_word = word
break
else:
if not one_matched and matched_word:
tokenizer.rollback_snapshot()
break
if not one_matched and not matched_word:
return False
else:
return False
if matched_word in auxiliary_keywords:
auxiliary_word = matched_word
matched_word = Keywords.HACK if matched_word in Keywords.HACK_AUX else Keywords.DEL
Warnings.add_warning(
HackersDelightMatcher.LazyPersonDetected(
pointer, auxiliary_word, matched_word))
return matched_word
def match_baseword(tokenizer: Tokenizer) -> Keywords:
token_word = ''
matched_word = ''
pointer = tokenizer.pointer_at()
auxiliary_keywords = Keywords.HACK_AUX + Keywords.DEL_AUX
all_keywords = (Keywords.HACK, Keywords.DEL) + auxiliary_keywords
while not tokenizer.reached_end():
one_matched = False
token_word += tokenizer.peek()
for word in all_keywords:
if word.startswith(token_word):
if not one_matched:
tokenizer.consume()
one_matched = True
if word == token_word:
if matched_word:
tokenizer.purge_snapshot()
tokenizer.take_snapshot()
matched_word = word
break
else:
if not one_matched and matched_word:
tokenizer.rollback_snapshot()
break
if not one_matched and not matched_word:
return False
else:
return False
if matched_word in auxiliary_keywords:
auxiliary_word = matched_word
matched_word = Keywords.HACK if matched_word in Keywords.HACK_AUX else Keywords.DEL
Warnings.add_warning(HackersDelightMatcher.LazyPersonDetected(pointer, auxiliary_word, matched_word))
return matched_word