view mercurial/utils/repoviewutil.py @ 46360:1726a53a8494

reverse-branch-cache: switch to doubling allocating scheme

In preperation for updating the reverse-branch-cache incrementally
whenever a new changeset comes in, avoid bad performance on resize with
Python 3.7 (and likely other 3.x versions).

Differential Revision: https://phab.mercurial-scm.org/D9778

# repoviewutil.py - constaints data relevant to repoview.py and other module
#
# Copyright 2012 Pierre-Yves David <[e-mail]>
#                Logilab SA        <[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

### Nearest subset relation
# Nearest subset of filter X is a filter Y so that:
# * Y is included in X,
# * X - Y is as small as possible.
# This create and ordering used for branchmap purpose.
# the ordering may be partial
subsettable = {
    None: b'visible',
    b'visible-hidden': b'visible',
    b'visible': b'served',
    b'served.hidden': b'served',
    b'served': b'immutable',
    b'immutable': b'base',
}