1 2 def flatten(tup): 3 elts = [] 4 for elt in tup: 5 if isinstance(elt, tuple): 6 elts = elts + flatten(elt) 7 else: 8 elts.append(elt) 9 return elts 10 11 class Set: 12 def __init__(self): 13 self.elts = {} 14 def __len__(self): 15 return len(self.elts) 16 def __contains__(self, elt): 17 return elt in self.elts 18 def add(self, elt): 19 self.elts[elt] = elt 20 def elements(self): 21 return self.elts.keys() 22 def has_elt(self, elt): 23 return elt in self.elts 24 def remove(self, elt): 25 del self.elts[elt] 26 def copy(self): 27 c = Set() 28 c.elts.update(self.elts) 29 return c 30 31 class Stack: 32 def __init__(self): 33 self.stack = [] 34 self.pop = self.stack.pop 35 def __len__(self): 36 return len(self.stack) 37 def push(self, elt): 38 self.stack.append(elt) 39 def top(self): 40 return self.stack[-1] 41 def __getitem__(self, index): # needed by visitContinue() 42 return self.stack[index] 43 44 MANGLE_LEN = 256 # magic constant from compile.c 45 46 def mangle(name, klass): 47 if not name.startswith('__'): 48 return name 49 if len(name) + 2 >= MANGLE_LEN: 50 return name 51 if name.endswith('__'): 52 return name 53 try: 54 i = 0 55 while klass[i] == '_': 56 i = i + 1 57 except IndexError: 58 return name 59 klass = klass[i:] 60 61 tlen = len(klass) + len(name) 62 if tlen > MANGLE_LEN: 63 klass = klass[:MANGLE_LEN-tlen] 64 65 return "_%s%s" % (klass, name) 66 67 def set_filename(filename, tree): 68 """Set the filename attribute to filename on every node in tree""" 69 worklist = [tree] 70 while worklist: 71 node = worklist.pop(0) 72 node.filename = filename 73 worklist.extend(node.getChildNodes()) 74
