diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index 0e01ad6..12f49c3 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -142,12 +142,13 @@ class SubPattern: class Tokenizer: def __init__(self, string): - self.index = 0 self.string = string - self.next = self.__next() + self.index = 0 + self.__next() def __next(self): if self.index >= len(self.string): - return None + self.next = None + return char = self.string[self.index] if char[0] == "\\": try: @@ -156,21 +157,20 @@ class Tokenizer: raise error, "bogus escape" char = char + c self.index = self.index + len(char) - return char + self.next = char def match(self, char): if char == self.next: - self.next = self.__next() - return 1 - return 0 - def match_set(self, set): - if self.next and self.next in set: - self.next = self.__next() + self.__next() return 1 return 0 def get(self): this = self.next - self.next = self.__next() + self.__next() return this + def tell(self): + return self.index, self.next + def seek(self, index): + self.index, self.next = index def isident(char): return "a" <= char <= "z" or "A" <= char <= "Z" or char == "_" @@ -381,6 +381,7 @@ def _parse(source, state): elif this == "+": min, max = 1, MAXREPEAT elif this == "{": + here = source.tell() min, max = 0, MAXREPEAT lo = hi = "" while source.next in DIGITS: @@ -391,7 +392,9 @@ def _parse(source, state): else: hi = lo if not source.match("}"): - raise error, "bogus range" + subpattern.append((LITERAL, ord(this))) + source.seek(here) + continue if lo: min = int(lo) if hi: |