comparison mercurial/revset.py @ 22742:6bbc26adcc6a

addset: offer a fastasc and fastdesc methods

If the underlying object offers fast iterators, we use them to provide fast
iterators too.

22741:ef2c1ea8fb2c

    def __iter__(self):
        if self._genlist:
            return iter(self._genlist)
        return iter(self._iterator())

    def _iterordered(self, ascending, iter1, iter2):
        """produce an ordered iteration from two iterators with the same order

        The ascending is used to indicated the iteration direction.
        """

22742:6bbc26adcc6a

    def __iter__(self):
        if self._genlist:
            return iter(self._genlist)
        return iter(self._iterator())

    @property
    def fastasc(self):
        iter1 = self._r1.fastasc
        iter2 = self._r2.fastasc
        if None in (iter1, iter2):
            return None
        return lambda: self._iterordered(True, iter1(), iter2())

    @property
    def fastdesc(self):
        iter1 = self._r1.fastdesc
        iter2 = self._r2.fastdesc
        if None in (iter1, iter2):
            return None
        return lambda: self._iterordered(False, iter1(), iter2())

    def _iterordered(self, ascending, iter1, iter2):
        """produce an ordered iteration from two iterators with the same order

        The ascending is used to indicated the iteration direction.
        """