util.py
40 lines
| 1.1 KiB
| text/x-python
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PythonLexer
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r43079 | # util.py - Utilities for declaring interfaces. | ||
# | ||||
# Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com> | ||||
# | ||||
# This software may be used and distributed according to the terms of the | ||||
# GNU General Public License version 2 or any later version. | ||||
# zope.interface imposes a run-time cost due to module import overhead and | ||||
# bookkeeping for declaring interfaces. So, we use stubs for various | ||||
# zope.interface primitives unless instructed otherwise. | ||||
from __future__ import absolute_import | ||||
from .. import ( | ||||
encoding, | ||||
) | ||||
if encoding.environ.get('HGREALINTERFACES'): | ||||
from ..thirdparty.zope import ( | ||||
interface as zi, | ||||
) | ||||
Attribute = zi.Attribute | ||||
Interface = zi.Interface | ||||
implementer = zi.implementer | ||||
else: | ||||
class Attribute(object): | ||||
def __init__(self, __name__, __doc__=''): | ||||
pass | ||||
class Interface(object): | ||||
def __init__(self, name, bases=(), attrs=None, __doc__=None, | ||||
__module__=None): | ||||
pass | ||||
def implementer(*ifaces): | ||||
def wrapper(cls): | ||||
return cls | ||||
return wrapper | ||||