divs1210

class Var(object):
    def __init__(self, name):
        self.name = name

    def __repr__(self):
        return self.name

class Lam(object):
    def __init__(self, bind, expr):
        self.bind = bind

divs1210

(defrecord Retry [bindings])

(defmacro with-retry
  "It's really inconvenient not being able to recur from within (catch)
  expressions. This macro wraps its body in a (loop [bindings] (try ...)).
  Provides a (retry & new bindings) form which is usable within (catch) blocks:
  when this form is returned by the body, the body will be retried with the new
  bindings."
  [initial-bindings & body]
  (assert (vector? initial-bindings))