comparison mercurial/revset.py @ 33417:d1b13d4995ed

revset: add experimental ancestors/descendants relation subscript

The relation name is 'generations' now, which may be changed in future.

33416:9467d5337292

def relationset(repo, subset, x, y, order):
    raise error.ParseError(_("can't use a relation in this context"))

def relsubscriptset(repo, subset, x, y, z, order):
    raise error.ParseError(_("can't use a relation in this context"))

def subscriptset(repo, subset, x, y, order):
    raise error.ParseError(_("can't use a subscript in this context"))

def listset(repo, subset, *xs):

33417:d1b13d4995ed

def relationset(repo, subset, x, y, order):
    raise error.ParseError(_("can't use a relation in this context"))

def relsubscriptset(repo, subset, x, y, z, order):
    # this is pretty basic implementation of 'x#y[z]' operator, still
    # experimental so undocumented. see the wiki for further ideas.
    # https://www.mercurial-scm.org/wiki/RevsetOperatorPlan
    rel = getsymbol(y)
    n = getinteger(z, _("relation subscript must be an integer"))

    # TODO: perhaps this should be a table of relation functions
    if rel in ('g', 'generations'):
        # TODO: support range, rewrite tests, and drop startdepth argument
        # from ancestors() and descendants() predicates
        if n <= 0:
            n = -n
            return _ancestors(repo, subset, x, startdepth=n, stopdepth=n + 1)
        else:
            return _descendants(repo, subset, x, startdepth=n, stopdepth=n + 1)

    raise error.UnknownIdentifier(rel, ['generations'])

def subscriptset(repo, subset, x, y, order):
    raise error.ParseError(_("can't use a subscript in this context"))

def listset(repo, subset, *xs):