Esempi in Python per ContextFree.find_nonterminals_rewritable_to_epsilon

Esempio n. 1

 def test_multipleUsage(self):
     g = Grammar(terminals=[0, 1, 2, 3],
                 nonterminals=[S, A, B, C, D],
                 rules=[Rules])
     n = ContextFree.find_nonterminals_rewritable_to_epsilon(g)
     self.assertEqual(len(n), 4)
     for i in [A, B, C, D]:
         self.assertIn(i, n)

Esempio n. 2

 def test_simpleTest(self):
     g = Grammar(terminals=[1],
                 nonterminals=[S, A, B, C],
                 rules=[Rules])
     n = ContextFree.find_nonterminals_rewritable_to_epsilon(g)
     self.assertEqual(len(n), 2)
     for i in [A, B]:
         self.assertIn(i, n)