diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 33 |
1 files changed, 9 insertions, 24 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index fad8014..b56d437 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -66,25 +66,24 @@ class Pattern: # master pattern object. keeps track of global attributes def __init__(self): self.flags = 0 + self.open = [] + self.groups = 1 self.groupdict = {} - self.subpatterns = [None] # group 0 - @property - def groups(self): - return len(self.subpatterns) def opengroup(self, name=None): gid = self.groups - self.subpatterns.append(None) + self.groups = gid + 1 if name is not None: ogid = self.groupdict.get(name, None) if ogid is not None: raise error("redefinition of group name %s as group %d; " "was group %d" % (repr(name), gid, ogid)) self.groupdict[name] = gid + self.open.append(gid) return gid - def closegroup(self, gid, p): - self.subpatterns[gid] = p + def closegroup(self, gid): + self.open.remove(gid) def checkgroup(self, gid): - return gid < self.groups and self.subpatterns[gid] is not None + return gid < self.groups and gid not in self.open class SubPattern: # a subpattern, in intermediate form @@ -182,21 +181,7 @@ class SubPattern: elif op in UNITCODES: lo = lo + 1 hi = hi + 1 - elif op is GROUPREF: - i, j = self.pattern.subpatterns[av].getwidth() - lo = lo + i - hi = hi + j - elif op is GROUPREF_EXISTS: - i, j = av[1].getwidth() - if av[2] is not None: - l, h = av[2].getwidth() - i = min(i, l) - j = max(j, h) - else: - i = 0 - lo = lo + i - hi = hi + j - elif op is SUCCESS: + elif op == SUCCESS: break self.width = min(lo, MAXREPEAT - 1), min(hi, MAXREPEAT) return self.width @@ -724,7 +709,7 @@ def _parse(source, state): if not sourcematch(")"): raise error("unbalanced parenthesis") if group is not None: - state.closegroup(group, p) + state.closegroup(group) subpatternappend((SUBPATTERN, (group, p))) else: while 1: |