def test_super(self):
"""
Rules can call the implementation in a superclass.
"""
from pymeta3.grammar import OMeta
grammar1 = "expr = letter"
TestGrammar1 = OMeta.makeGrammar(grammar1, {})
grammar2 = "expr = super | digit"
TestGrammar2 = TestGrammar1.makeGrammar(grammar2, {})
self.assertEqual(TestGrammar2("x").apply("expr")[0], "x")
self.assertEqual(TestGrammar2("3").apply("expr")[0], "3")
def test_super(self):
"""
Rules can call the implementation in a superclass.
"""
from pymeta3.grammar import OMeta
grammar1 = "expr = letter"
TestGrammar1 = OMeta.makeGrammar(grammar1, {})
grammar2 = "expr = super | digit"
TestGrammar2 = TestGrammar1.makeGrammar(grammar2, {})
self.assertEqual(TestGrammar2("x").apply("expr")[0], "x")
self.assertEqual(TestGrammar2("3").apply("expr")[0], "3")
def test_makeGrammar(self):
#imported here to prevent OMetaGrammar from being constructed before
#tests are run
from pymeta3.grammar import OMeta
results = []
grammar = dedent("""
digit = :x ?('0' <= x <= '9') -> int(x)
num = (num:n digit:d !(results.append(True)) -> n * 10 + d
| digit)
""")
TestGrammar = OMeta.makeGrammar(grammar, {'results': results})
g = TestGrammar("314159")
self.assertEqual(g.apply("num")[0], 314159)
self.assertNotEqual(len(results), 0)
def test_makeGrammar(self):
#imported here to prevent OMetaGrammar from being constructed before
#tests are run
from pymeta3.grammar import OMeta
results = []
grammar = dedent("""
digit = :x ?('0' <= x <= '9') -> int(x)
num = (num:n digit:d !(results.append(True)) -> n * 10 + d
| digit)
""")
TestGrammar = OMeta.makeGrammar(grammar, {'results': results})
g = TestGrammar("314159")
self.assertEqual(g.apply("num")[0], 314159)
self.assertNotEqual(len(results), 0)
def test_subclassing(self):
"""
A subclass of an OMeta subclass should be able to call rules on its
parent.
"""
from pymeta3.grammar import OMeta
grammar1 = dedent("""
dig = :x ?('0' <= x <= '9') -> int(x)
""")
TestGrammar1 = OMeta.makeGrammar(grammar1, {})
grammar2 = dedent("""
num = (num:n dig:d -> n * 10 + d
| dig)
""")
TestGrammar2 = TestGrammar1.makeGrammar(grammar2, {})
g = TestGrammar2("314159")
self.assertEqual(g.apply("num")[0], 314159)
def test_subclassing(self):
"""
A subclass of an OMeta subclass should be able to call rules on its
parent.
"""
from pymeta3.grammar import OMeta
grammar1 = dedent("""
dig = :x ?('0' <= x <= '9') -> int(x)
""")
TestGrammar1 = OMeta.makeGrammar(grammar1, {})
grammar2 = dedent("""
num = (num:n dig:d -> n * 10 + d
| dig)
""")
TestGrammar2 = TestGrammar1.makeGrammar(grammar2, {})
g = TestGrammar2("314159")
self.assertEqual(g.apply("num")[0], 314159)