Use of other protocol method in extend-type

Question

I'm building a graph editor with Piccolo2D and want to implement Loom's Graph protocol. However I run into problem

Unable to resolve symbol: out-edges in this context

What really confusing is that I can use successors in has-edge.

(extend-type PCanvas Graph (nodes [g] (->children (->node-layer g))) (edges [g] (->children (->edge-layer g))) (has-node? [g node] (some #{node} (nodes g))) (has-edge? [g n1 n2] (some #{n2} (successors g n1))) (successors ([g] (partial successors g)) ([g node] (remove (partial = node) (distinct (flatten (apply concat (map ->nodes (out-edges g node)))))))) (out-degree [g node] (count (out-edges g node))) (out-edges [g node] (->edges node)))

So in what condition protocol methods can call others?

Edit: Full error message: http://pastebin.com/NDWEZZ7y

Normally (iirc) protocol implementations should be able to call the protocol methods themselves freely. Can you post the full error message? — jgriego
– jgriego, Commented May 2, 2014 at 4:58
Yep, that's what I thought too. I added the full error message. — tungd
– tungd, Commented May 2, 2014 at 5:08

aysylu · Accepted Answer · 2014-06-09 03:01:07Z

2

I released Loom version 0.5.0 which includes the multigraph support.

answered Jun 9, 2014 at 3:01

aysylu

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A. Webb · Accepted Answer · 2014-05-02 14:10:52Z

There is no such method in the current release, 0.4.2, which is 4 months old, see https://github.com/aysylu/loom/blob/0.4.2/src/loom/graph.clj#L13. You are probably looking at the master branch in GitHub, changes made 23 days ago, not yet in a release.

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