def setUp(self):
super().setUp()
g = GrammarBuilder()
g.xy = Terminal('x') | Terminal('y')
g.yx = Terminal('x') | Terminal('y')
g.start = flatten(Lookahead('x') + g.xy) | g.yx
self.grammar = g(start=g.start)
def setUp(self):
g = GrammarBuilder()
g.a = Terminal('A')
g.b = Terminal('B')
g.c = Terminal('C')
g.ab = g.a | g.b
g.start = g.ab + g.ab
g.whitespace = Regexp(r'\s+')
self.grammar = g(start=g.start, tokenize=[ignore(g.whitespace)])
def test_default_format(self):
g = GrammarBuilder()
g.string = builtins.double_quoted_string
g.sequence = builtins.py_integer + Terminal('x')
g.start = g.string | g.sequence | epsilon
grammar = g(start=g.start)
format = GrammarFormatter()
self.assertEqual(
format(grammar),
textwrap.dedent(r"""
string ::= r'"(?:\\\\"|[^"])*"'
sequence ::= r'[1-9]\\d*' / '0' / r'0[xX][0-9a-fA-F]+' / r'0[oO][0-7]+' / r'0[0-7]+' / r'0[bB][01]+', 'x'
start ::= string / sequence / ɛ
""").strip())
def setUp(self):
super().setUp()
g = GrammarBuilder()
g.ab = Terminal('A') | Terminal('B')
g.seq = repeat(g.ab, separator=',', trailing=True)
self.grammar = g(start=g.seq)
def setUp(self):
super().setUp()
g = GrammarBuilder()
g.ab = Terminal('A') | Terminal('B')
g.start = g.ab + g.ab
self.grammar = g(start=g.start)
def setUp(self):
super().setUp()
g = GrammarBuilder()
g.ab = flatten(Terminal('A') | Terminal('B'))
g.seq = repeat(g.ab)
self.grammar = g(start=g.seq)