graph: Add 'node-reachable-count'.
authorLudovic Courtès <ludo@gnu.org>
Mon, 23 May 2016 21:03:23 +0000 (23:03 +0200)
committerLudovic Courtès <ludo@gnu.org>
Mon, 23 May 2016 22:06:01 +0000 (00:06 +0200)
commite144e3427da93b962c7620ce2bd64add8c83cfdc
tree2f1cd6dd65e764e8dab09d5fa97f86a62664617d
parent623e4df42abd024e0a62ef0b30f9b550f37cba57
graph: Add 'node-reachable-count'.

* guix/graph.scm (node-reachable-count): New procedure.
* tests/graph.scm ("node-reachable-count"): New test.
guix/graph.scm
tests/graph.scm