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- # Source Generated with Decompyle++
- # File: in.pyo (Python 2.5)
-
- from compiler import ast
-
- class ASTVisitor:
- VERBOSE = 0
-
- def __init__(self):
- self.node = None
- self._cache = { }
-
-
- def default(self, node, *args):
- for child in node.getChildNodes():
- self.dispatch(child, *args)
-
-
-
- def dispatch(self, node, *args):
- self.node = node
- klass = node.__class__
- meth = self._cache.get(klass, None)
- if meth is None:
- className = klass.__name__
- meth = getattr(self.visitor, 'visit' + className, self.default)
- self._cache[klass] = meth
-
- return meth(node, *args)
-
-
- def preorder(self, tree, visitor, *args):
- self.visitor = visitor
- visitor.visit = self.dispatch
- self.dispatch(tree, *args)
-
-
-
- class ExampleASTVisitor(ASTVisitor):
- examples = { }
-
- def dispatch(self, node, *args):
- self.node = node
- meth = self._cache.get(node.__class__, None)
- className = node.__class__.__name__
- if meth is None:
- meth = getattr(self.visitor, 'visit' + className, 0)
- self._cache[node.__class__] = meth
-
- if self.VERBOSE > 1:
- print 'dispatch', className,
- if not meth or meth.__name__:
- pass
- print ''
-
- if meth:
- meth(node, *args)
- elif self.VERBOSE > 0:
- klass = node.__class__
- if not self.examples.has_key(klass):
- self.examples[klass] = klass
- print
- print self.visitor
- print klass
- for attr in dir(node):
- if attr[0] != '_':
- print '\t', '%-12.12s' % attr, getattr(node, attr)
- continue
-
- print
-
- return self.default(node, *args)
-
-
-
- _walker = ASTVisitor
-
- def walk(tree, visitor, walker = None, verbose = None):
- if walker is None:
- walker = _walker()
-
- if verbose is not None:
- walker.VERBOSE = verbose
-
- walker.preorder(tree, visitor)
- return walker.visitor
-
-
- def dumpNode(node):
- print node.__class__
- for attr in dir(node):
- if attr[0] != '_':
- print '\t', '%-10.10s' % attr, getattr(node, attr)
- continue
-
-
-