def _make():
# Order is important - multi-char expressions need to come before narrow
# ones.
parts = []
for klass in filt_unary:
f = pp.Literal("~%s"%klass.code)
f.setParseAction(klass.make)
parts.append(f)
simplerex = "".join(c for c in pp.printables if c not in "()~'\"")
rex = pp.Word(simplerex) |\
pp.QuotedString("\"", escChar='\\') |\
pp.QuotedString("'", escChar='\\')
for klass in filt_rex:
f = pp.Literal("~%s"%klass.code) + rex.copy()
f.setParseAction(klass.make)
parts.append(f)
for klass in filt_int:
f = pp.Literal("~%s"%klass.code) + pp.Word(pp.nums)
f.setParseAction(klass.make)
parts.append(f)
# A naked rex is a URL rex:
f = rex.copy()
f.setParseAction(FUrl.make)
parts.append(f)
atom = pp.MatchFirst(parts)
expr = pp.operatorPrecedence(
atom,
[
(pp.Literal("!").suppress(), 1, pp.opAssoc.RIGHT, lambda x: FNot(*x)),
(pp.Literal("&").suppress(), 2, pp.opAssoc.LEFT, lambda x: FAnd(*x)),
(pp.Literal("|").suppress(), 2, pp.opAssoc.LEFT, lambda x: FOr(*x)),
]
)
expr = pp.OneOrMore(expr)
return expr.setParseAction(lambda x: FAnd(x) if len(x) != 1 else x)
ascii_uppercase=string.ascii_uppercase,
digits=string.digits,
hexdigits=string.hexdigits,
octdigits=string.octdigits,
punctuation=string.punctuation,
whitespace=string.whitespace,
ascii=string.printable,
bytes="".join(chr(i) for i in range(256)))
v_integer = pp.Word(pp.nums)\
.setName("integer")\
.setParseAction(lambda toks: int(toks[0]))
v_literal = pp.MatchFirst([
pp.QuotedString("\"", escChar="\\", unquoteResults=True, multiline=True),
pp.QuotedString("'", escChar="\\", unquoteResults=True, multiline=True),
])
v_naked_literal = pp.MatchFirst([
v_literal,
pp.Word("".join(i for i in pp.printables if i not in ",:\n@\'\""))
])
class LiteralGenerator:
def __init__(self, s):
self.s = s
def __len__(self):
return len(self.s)