Mercurial > hg
view mercurial/utils/interfaceutil.py @ 40935:4591c9791a82
templatefuncs: specialize "no match" value of search() to allow % operation
If Python had Maybe or Option, the type of the search() result would be
Option<Mapping>, which can be considered as a 0/1 container of a Mapping.
So it makes sense that {search(r'no match pattern', x) % "whatever"} is
mapped to an empty string.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Wed, 12 Dec 2018 22:45:02 +0900 |
parents | 856f381ad74b |
children |
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# interfaceutil.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