def rule_right_or(left: utils.Sentence, right: utils.Sentence, side: str,
used: list[tuple[str]]):
# sourcery skip: merge-duplicate-blocks
""" ... => (A,B)[side]
______________
... => AvB
"""
# Usunięto find bo trochę przesadne chwilowo
if not right or side not in ('l', 'r'):
return (None, None)
split = utils.strip_around(right, 'or', False, PRECEDENCE)
if split is None or split[0] is None:
return (None, None)
left_split, right_split = split[0]
if side == 'l':
return ((left, ), ), ((left_split, ), )
elif side == 'r':
return ((left, ), ), ((right_split, ), )
else:
if is_sequent(left, left_split):
return ((left, ), ), ((left_split, ), )
elif is_sequent(left, right_split):
return ((left, ), ), ((right_split, ), )
else:
# Default case
return ((left, ), ), ((max(split[0], key=len), ), )
if ret in used:
raise utils.FormalError(
"Operation prohibited by loop detection algorithm")
utils.pop_part(right, 'sep', 0)
return ((left, ), ), ((debrac(ret), ), )
def check_closure(
branch: list[utils.Sentence], used: set[tuple[str]]
) -> tp.Union[None, tuple[utils.close.Close, str]]:
"""Sprawdza możliwość zamknięcia gałęzi, zwraca obiekty zamknięcia oraz komunikat do wyświetlenia"""
left, right = utils.strip_around(branch[-1], "turnstile", False,
PRECEDENCE)[0]
left = [i for i in left if i != "^"]
seps = sum((i.startswith('sep_') for i in left), 1)
# Right part verification
empty = len(right) == 1
# Left part verification
if not left:
return None
for i in range(seps):
f = utils.pop_part(left[:], 'sep', i)
# F, ... => ...
if len(f) == 1 and f[0].startswith("falsum_"):
return utils.close.Falsum, "Falsum found on the left"
# p, ... => p
if f == right:
return utils.close.Axiom, "Sequent on the right corresponds with a sequent on the left"
# Detect finish
empty &= not any((any((j.startswith(i) for j in f))
for i in ('and_', 'or_', 'imp_')))
if empty:
return utils.close.Emptiness, "Nothing more can be done with this branch, so it was closed."
def rule_left_weak(left: utils.Sentence, right: utils.Sentence, num: int):
""" ... => ...
______________
..., A => ...
"""
try:
conj = utils.pop_part(left, 'sep', num - 1)
except IndexError:
return (None, None)
return ((left, ), ), ((right, ), )
def rule_right_and(left: utils.Sentence, right: utils.Sentence):
""" ... => A ... => B
__________________________
... => A&B
"""
conj = utils.pop_part(right, 'sep', 0)
if conj is None:
return (None, None)
split = utils.strip_around(conj, 'and', False, PRECEDENCE)
if split is None or split[0] is None:
return (None, None)
split = split[0]
return ((left,),(left,),), ((split[0],),(split[1],),)
def rule_left_or(left: utils.Sentence, right: utils.Sentence, num: int):
""" A,... => ... B,... => ...
__________________________
AvB,... => ...
"""
try:
conj = utils.pop_part(left, 'sep', num-1)
except IndexError:
return (None, None)
split = utils.strip_around(conj, 'or', False, PRECEDENCE)
if split is None or split[0] is None:
return (None, None)
split = split[0]
return ((split[0]+sep(left)+left,),(split[1]+sep(left)+left,),), ((right,),(right,),)
def rule_right_imp(left: utils.Sentence, right: utils.Sentence):
""" ..., A => B
______________
... => A -> B
"""
try:
conj = utils.pop_part(right, 'sep', 0)
except IndexError:
return (None, None)
split = utils.strip_around(conj, 'imp', False, PRECEDENCE)
if split is None or split[0] is None:
return (None, None)
split = split[0]
return ((split[0]+sep(left)+left,),), ((split[1],),)
def rule_left_imp(left: utils.Sentence, right: utils.Sentence, num: int):
""" A -> B, ... => A B,... => ...
________________________________
A -> B,... => ...
"""
try:
conj = utils.pop_part(left, 'sep', num - 1)
except IndexError:
return (None, None)
split = utils.strip_around(conj, 'imp', False, PRECEDENCE)
if split is None or split[0] is None:
return (None, None)
split = split[0]
return (
(conj + sep(left) + left, ),
(debrac(split[1]) + sep(left) + left, ),
), (
(debrac(split[0]), ),
(right, ),
)
def use_rule(
name: str, branch: list[utils.Sentence], used: utils.History,
context: dict[str, tp.Any], decisions: dict[str, tp.Any]
) -> tuple[utils.SentenceTupleStructure, utils.HistoryTupleStructure, dict[
str, tp.Any]]:
"""
Używa określonej reguły na podanej gałęzi.
Więcej: https://www.notion.so/szymanski/Gniazda-w-Larchu-637a500c36304ee28d3abe11297bfdb2#98e96d34d3c54077834bc0384020ff38
:param name: Nazwa używanej reguły, listę można uzyskać z pomocą Formal.get_rules_docs()
:type name: str
:param branch: Lista zdań w gałęzi, na której została użyta reguła
:type branch: list[utils.Sentence]
:param used: Obiekt historii przechowujący informacje o już rozłożonych zdaniach
:type used: utils.History
:param context: kontekst wymagany do zastosowania reguły, listę można uzyskać z pomocą Formal.get_needed_context(rule)
Kontekst reguł: https://www.notion.so/szymanski/Zarz-dzanie-kontekstem-regu-2a5abea2a1bc492e8fa3f8b1c046ad3a
:type context: dict[str, tp.Any]
:param auto: , defaults to False
:type auto: bool, optional
:return: Struktura krotek, reprezentująca wynik reguły oraz strukturę reprezentującą operacje do wykonania na zbiorze zamknięcia.
Struktury krotek: https://www.notion.so/szymanski/Reprezentacja-dowod-w-w-Larchu-cd36457b437e456a87b4e0c2c2e38bd5#014dccf44246407380c4e30b2ea598a9
Zamykanie gałęzi: https://www.notion.so/szymanski/Zamykanie-ga-zi-53249279f1884ab4b6f58bbd6346ec8d
:rtype: tuple[tp.Union[tuple[tuple[utils.Sentence]], None], tp.Union[tuple[tuple[tp.Union[int, Callable, utils.Sentence]]], None]]
"""
rule = RULES[name]
start = utils.strip_around(branch[-1], "turnstile", False, PRECEDENCE)
start_left, start_right = start[0]
# Check sequent number
if context.get('partID',
-1) > sum(i.startswith('sep') for i in start_left) + 1:
raise utils.FormalError("Sequent number is too big")
# Loop detection
history = None
if name == "left imp":
p = utils.pop_part(start_left[:], 'sep', context['partID'] - 1)
l, r = utils.strip_around(p, "imp", False, PRECEDENCE)[0]
if tuple(l) in used:
raise utils.FormalError(
"Operation prohibited by loop detection algorithm")
else:
history = [[l], [0]]
elif name == 'left or':
p = utils.pop_part(start_left[:], 'sep', context['partID'] - 1)
l, r = utils.strip_around(p, "or", False, PRECEDENCE)[0]
if is_sequent(start_left, l) or is_sequent(start_left, r):
raise utils.FormalError(
"Operation prohibited by loop detection algorithm")
else:
history = [[-1, start_right], [-1, start_right]]
elif name == 'right imp':
if (stripped := utils.strip_around(start_right, "imp", False,
PRECEDENCE)) is None:
return None, None, None
l, r = stripped[0]
if is_sequent(start_left, l):
if tuple(r) not in used:
history = [[r]]
else:
raise utils.FormalError(
"Operation prohibited by loop detection algorithm")
else:
history = [[-1, r]]