def generic_visit(self, node):
if node in self.constant_expressions:
try:
fake_node = ast.Expression(
node.value if isinstance(node, ast.Index) else node)
code = compile(fake_node, '<constant folding>', 'eval')
value = eval(code, self.env)
new_node = self.to_ast(value)
if (isinstance(node, ast.Index)
and not isinstance(new_node, ast.Index)):
new_node = ast.Index(new_node)
return new_node
except Exception: # as e:
#print ast.dump(node)
#print 'error in constant folding: ', e
return Transformation.generic_visit(self, node)
else:
return Transformation.generic_visit(self, node)
