def inner(expr, env): if sequence.is_last_expr(expr): return self._eval(sequence.first_expr(expr), env) first_value = self._eval(sequence.first_expr(expr), env) if first_value: return first_value return inner(sequence.rest_exprs(expr), env)
def _eval_sequence(self, expressions, env): if sequence.is_last_expr(expressions): return self._eval(sequence.first_expr(expressions), env) else: self._eval(sequence.first_expr(expressions), env) return self._eval_sequence(sequence.rest_exprs(expressions), env)
def inner(expr, env): if sequence.is_last_expr(expr): return self._eval(sequence.first_expr(expr), env) if not self._eval(sequence.first_expr(expr), env): return Boolean(False) return inner(sequence.rest_exprs(expr), env)