[PATCH 3 of 6] obsolete: populate successors(), precursors(), children() lazily

[Matt Mackall]

On Tue, 2015-02-03 at 20:01 -0800, Martin von Zweigbergk wrote:
> # HG changeset patch
> # User Martin von Zweigbergk <martinvonz at google.com>
> # Date 1421822097 28800
> #      Tue Jan 20 22:34:57 2015 -0800
> # Node ID cd65758885ab3cc6649001fa9aa68105d818323a
> # Parent  518d3caf2307a7699ec078afe9b1e6991640941c
> obsolete: populate successors(), precursors(), children() lazily

>      def successors(self):
> +        if self._successors is None:
> +            self._successors = {}
> +            self._addsuccessors(self._all)
>          return self._successors

You probably want to look at how util.propertycache is used to make a
faster version of this pattern.

-- 
Mathematics is the supreme nostalgia of our time.