def parse(self, s, cur=None):
if s is None:
return None
if s == 'empty':
return self.range(empty=True)
m = self._re_range.match(s)
if m is None:
raise InterfaceError("failed to parse range: %s")
lower = m.group(3)
if lower is None:
lower = m.group(2)
if lower is not None:
lower = self._re_undouble.sub(r"\1", lower)
upper = m.group(5)
if upper is None:
upper = m.group(4)
if upper is not None:
upper = self._re_undouble.sub(r"\1", upper)
if cur is not None:
lower = cur.cast(self.subtype_oid, lower)
upper = cur.cast(self.subtype_oid, upper)
bounds = m.group(1) + m.group(6)
return self.range(lower, upper, bounds)
def check_closed_(self, *args, **kwargs):
if self.closed:
raise InterfaceError("connection already closed")
return func(self, *args, **kwargs)