def test_simpleTestOverUnitRule(self):
g = Grammar(terminals=[0, 1],
nonterminals=[S, A, B, C, D],
rules=[RuleS1AB, RuleB0, RuleACD, RuleCD, RuleDEps],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(
ContextFree.remove_rules_with_epsilon(g)))
pars = cyk(gr, [1, 0])
s = InverseContextFree.epsilon_rules_restore(
InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars)))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS1AB)
self.assertIsInstance(s.to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[0].s, 1)
b = s.to_rule.to_symbols[2]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB0)
self.assertIsInstance(b.to_rule.to_symbols[0], Terminal)
self.assertEqual(b.to_rule.to_symbols[0].s, 0)
a = s.to_rule.to_symbols[1]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleACD)
d = a.to_rule.to_symbols[1]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleDEps)
self.assertIs(d.to_rule.to_symbols[0].s, EPS)
c = a.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleCD)
d = c.to_rule.to_symbols[0]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleDEps)
self.assertIs(d.to_rule.to_symbols[0].s, EPS)
def test_repeatOfC(self):
g = Grammar(terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C, D],
rules=[
RuleSA, RuleSB, RuleAC, RuleA0A, RuleBD, RuleB2B,
RuleB3S, RuleC1C, RuleC0, RuleD3D, RuleD2
],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(g))
pars = cyk(gr, [1, 1, 0])
s = InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleSA)
a = s.to_rule.to_symbols[0]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleAC)
c = a.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC1C)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 1)
c = c.to_rule.to_symbols[1]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC1C)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 1)
c = c.to_rule.to_symbols[1]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC0)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 0)
def parse_from_tokens(input):
parsed = cyk(_g, input)
parsed = InverseContextFree.transform_from_chomsky_normal_form(parsed)
parsed = InverseContextFree.unit_rules_restore(parsed)
parsed = InverseContextFree.epsilon_rules_restore(parsed)
parsed = InverseCommon.splitted_rules(parsed)
return parsed.get_representation()
def test_transform(self):
g = Grammar(terminals=[0, 1, 2],
nonterminals=[S, A, B, C],
rules=[RuleSABC, RuleA0, RuleB1, RuleC2],
start_symbol=S)
com = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(com, [0, 1, 2])
trans = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(trans, S)
self.assertIsInstance(trans.to_rule, RuleSABC)
a = trans.to_rule.to_symbols[0]
b = trans.to_rule.to_symbols[1]
c = trans.to_rule.to_symbols[2]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleA0)
self.assertIsInstance(a.to_rule.to_symbols[0], Terminal)
self.assertEqual(a.to_rule.to_symbols[0].s, 0)
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB1)
self.assertIsInstance(b.to_rule.to_symbols[0], Terminal)
self.assertEqual(b.to_rule.to_symbols[0].s, 1)
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC2)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 2)
def test_shouldParseAndUseValues(self):
parsed = cyk(self.g, [My(1), My(2)])
parsed = InverseContextFree.transform_from_chomsky_normal_form(parsed)
parsed = InverseContextFree.unit_rules_restore(parsed)
parsed = InverseContextFree.epsilon_rules_restore(parsed)
self.assertIsInstance(parsed, S)
self.assertIsInstance(parsed.to_rule, R)
left = parsed.to_rule.to_symbols[0]
right = parsed.to_rule.to_symbols[1]
self.assertIsInstance(left, Terminal)
self.assertIsInstance(left.s, My)
self.assertEqual(left.s.prop, 1)
self.assertIsInstance(right, Terminal)
self.assertIsInstance(right.s, My)
self.assertEqual(right.s.prop, 2)
def test_simpleTestOverUnitRule(self):
g = Grammar(
terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C],
rules=[RuleS0A, RuleAB, RuleAEps, RuleBEps, RuleB1C, RuleC11],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(
ContextFree.remove_rules_with_epsilon(g)))
pars = cyk(gr, [0])
s = InverseContextFree.epsilon_rules_restore(
InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars)))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS0A)
self.assertIsInstance(s.to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[0].s, 0)
a = s.to_rule.to_symbols[1]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleAEps)
self.assertIs(a.to_rule.to_symbols[0].s, EPS)
def test_transform(self):
g = Grammar(terminals=[0, 1],
nonterminals=[S],
rules=[Rules],
start_symbol=S)
tr = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(tr, [0, 1])
rest = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(rest, S)
self.assertIsInstance(rest.to_rule, Rules)
self.assertIsInstance(rest.to_rule.to_symbols[0], Terminal)
self.assertIsInstance(rest.to_rule.to_symbols[1], Terminal)
self.assertEqual(rest.to_rule.to_symbols[0].s, 0)
self.assertEqual(rest.to_rule.to_symbols[1].s, 1)
def test_directTo2(self):
g = Grammar(terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C, D],
rules=[
RuleSA, RuleSB, RuleAC, RuleA0A, RuleA1S, RuleBD,
RuleB2B, RuleB3S, RuleC1C, RuleC0, RuleD3D, RuleD2
],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(g))
pars = cyk(gr, [2])
s = InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleSB)
b = s.to_rule.to_symbols[0]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleBD)
d = b.to_rule.to_symbols[0]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleD2)
self.assertIsInstance(d.to_rule.to_symbols[0], Terminal)
self.assertEqual(d.to_rule.to_symbols[0].s, 2)
def test_transform(self):
g = Grammar(terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C],
rules=[RuleS, RuleA, RuleB, RuleS0, RuleA1, RuleB2, RuleC3],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(gr, [1, 3, 1, 2, 3, 1, 3])
trans = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(trans, S)
self.assertIsInstance(trans.to_rule, RuleS)
a = trans.to_rule.to_symbols[0]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleA1)
self.assertIsInstance(a.to_rule.to_symbols[0], Terminal)
self.assertEqual(a.to_rule.to_symbols[0].s, 1)
b = trans.to_rule.to_symbols[1]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB)
c = b.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC3)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 3)
s = b.to_rule.to_symbols[1]
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS)
self.assertIsInstance(s.to_rule.to_symbols[0], A)
self.assertIsInstance(s.to_rule.to_symbols[0].to_rule, RuleA1)
self.assertIsInstance(s.to_rule.to_symbols[0].to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[0].to_rule.to_symbols[0].s, 1)
self.assertIsInstance(s.to_rule.to_symbols[1], B)
self.assertIsInstance(s.to_rule.to_symbols[1].to_rule, RuleB2)
self.assertIsInstance(s.to_rule.to_symbols[1].to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[1].to_rule.to_symbols[0].s, 2)
self.assertIsInstance(s.to_rule.to_symbols[2], C)
self.assertIsInstance(s.to_rule.to_symbols[2].to_rule, RuleC3)
self.assertIsInstance(s.to_rule.to_symbols[2].to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 3)
self.assertIsInstance(b.to_rule.to_symbols[2], A)
self.assertIsInstance(b.to_rule.to_symbols[2].to_rule, RuleA1)
self.assertIsInstance(b.to_rule.to_symbols[2].to_rule.to_symbols[0], Terminal)
self.assertEqual(b.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 1)
self.assertIsInstance(pars.to_rule.to_symbols[2], C)
self.assertIsInstance(pars.to_rule.to_symbols[2].to_rule, RuleC3)
self.assertIsInstance(pars.to_rule.to_symbols[2].to_rule.to_symbols[0], Terminal)
self.assertEqual(pars.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 3)
def get(self):
yield from self.to_symbols[0].get
yield from self.to_symbols[2].get
g = Grammar(terminals=list(ascii_lowercase + '()*+'),
nonterminals=[Symb, Concat, Or, Iterate],
rules=[
SymbRule, Bracket, ConcatRewrite, ConcatRule, OrRewrite,
OrRule, IterateRewrite, IterateRule
],
start_symbol=Or)
if __name__ == '__main__':
gr = ContextFree.prepare_for_cyk(g)
while True:
read = input("Type regex or exit to quit: ").strip()
if read == "exit":
break
if len(read) == 0:
continue
root = cyk(gr, read)
root = InverseContextFree.reverse_cyk_transforms(root)
root = InverseCommon.splitted_rules(root)
for form in root.get:
print(form)
print("Quiting the application")