mercurial/thirdparty/zope/interface/_flatten.py
author Joerg Sonnenberger <joerg@bec.de>
Fri, 30 Apr 2021 02:11:58 +0200
changeset 47043 12450fbea288
parent 37178 68ee61822182
permissions -rw-r--r--
manifests: push down expected node length into the parser This strictly enforces the node length in the manifest lines according to what the repository expects. One test case moves large hash testing into the non-treemanifest part as treemanifests don't provide an interface for overriding just the node length for now. Differential Revision: https://phab.mercurial-scm.org/D10533

##############################################################################
#
# Copyright (c) 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.
#
##############################################################################
"""Adapter-style interface registry

See Adapter class.
"""

from __future__ import absolute_import

from .interface import Declaration

def _flatten(implements, include_None=0):

    try:
        r = implements.flattened()
    except AttributeError:
        if implements is None:
            r=()
        else:
            r = Declaration(implements).flattened()

    if not include_None:
        return r

    r = list(r)
    r.append(None)
    return r