view mercurial/revlogutils/nodemap.py @ 44199:7f8bdee0034e

copies: define a type to return from mergecopies()

We'll soon return two instances of many of the dicts from
`copies.mergecopies()`. That will mean that we need to return 9
different dicts, which is clearly not manageable. This patch instead
encapsulates the 4 dicts we'll duplicate in a new type. For now, we
still just return one instance of it (plus the separate `diverge`
dict).

Differential Revision: https://phab.mercurial-scm.org/D7989

# nodemap.py - nodemap related code and utilities
#
# Copyright 2019 Pierre-Yves David <[e-mail]>
# Copyright 2019 George Racinet <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import
from .. import error


class NodeMap(dict):
    def __missing__(self, x):
        raise error.RevlogError(b'unknown node: %s' % x)