##// END OF EJS Templates
thirdparty: vendor zope.interface 4.4.3...
thirdparty: vendor zope.interface 4.4.3 I've been trying to formalize interfaces for various components of Mercurial. So far, we've been using the "abc" package. This package is "good enough" for a lot of tasks. But it quickly falls over. For example, if you declare an @abc.abstractproperty, you must implement that attribute with a @property or the class compile time checking performed by abc will complain. This often forces you to implement dumb @property wrappers to return a _ prefixed attribute of the sane name. That's ugly. I've also wanted to implement automated checking that classes conform to various interfaces and don't expose other "public" attributes. After doing a bit of research and asking around, the general consensus seems to be that zope.interface is the best package for doing interface-based programming in Python. It has built-in support for verifying classes and objects conform to interfaces. It allows an interface's properties to be defined during __init__. There's even an "adapter registry" that allow you to register interfaces and look up which classes implement them. That could potentially be useful for places where our custom registry.py modules currently facilitates central registrations, but at a type level. Imagine extensions providing alternate implementations of things like the local repository interface to allow opening repositories with custom requirements. Anyway, this commit vendors zope.interface 4.4.3. The contents of the source tarball have been copied into mercurial/thirdparty/zope/ without modifications. Test modules have been removed because they are not interesting to us. The LICENSE.txt file has been copied so it lives next to the source. The Python modules don't use relative imports. zope/__init__.py defines a namespace package. So we'll need to modify the source code before this package is usable inside Mercurial. This will be done in subsequent commits. # no-check-commit for various style failures Differential Revision: https://phab.mercurial-scm.org/D2928

File last commit:

r37193:943d77fc default
r37193:943d77fc default
Show More
__init__.py
90 lines | 3.3 KiB | text/x-python | PythonLexer
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Interfaces
This package implements the Python "scarecrow" proposal.
The package exports two objects, `Interface` and `Attribute` directly. It also
exports several helper methods. Interface is used to create an interface with
a class statement, as in:
class IMyInterface(Interface):
'''Interface documentation
'''
def meth(arg1, arg2):
'''Documentation for meth
'''
# Note that there is no self argument
To find out what you can do with interfaces, see the interface
interface, `IInterface` in the `interfaces` module.
The package has several public modules:
o `declarations` provides utilities to declare interfaces on objects. It
also provides a wide range of helpful utilities that aid in managing
declared interfaces. Most of its public names are however imported here.
o `document` has a utility for documenting an interface as structured text.
o `exceptions` has the interface-defined exceptions
o `interfaces` contains a list of all public interfaces for this package.
o `verify` has utilities for verifying implementations of interfaces.
See the module doc strings for more information.
"""
__docformat__ = 'restructuredtext'
from zope.interface.interface import Interface
from zope.interface.interface import _wire
# Need to actually get the interface elements to implement the right interfaces
_wire()
del _wire
from zope.interface.declarations import Declaration
from zope.interface.declarations import alsoProvides
from zope.interface.declarations import classImplements
from zope.interface.declarations import classImplementsOnly
from zope.interface.declarations import classProvides
from zope.interface.declarations import directlyProvidedBy
from zope.interface.declarations import directlyProvides
from zope.interface.declarations import implementedBy
from zope.interface.declarations import implementer
from zope.interface.declarations import implementer_only
from zope.interface.declarations import implements
from zope.interface.declarations import implementsOnly
from zope.interface.declarations import moduleProvides
from zope.interface.declarations import named
from zope.interface.declarations import noLongerProvides
from zope.interface.declarations import providedBy
from zope.interface.declarations import provider
from zope.interface.exceptions import Invalid
from zope.interface.interface import Attribute
from zope.interface.interface import invariant
from zope.interface.interface import taggedValue
# The following are to make spec pickles cleaner
from zope.interface.declarations import Provides
from zope.interface.interfaces import IInterfaceDeclaration
moduleProvides(IInterfaceDeclaration)
__all__ = ('Interface', 'Attribute') + tuple(IInterfaceDeclaration)