Joe Thornber 5d0b23beea Some btree visitor tidying.
Introduce node_location to replace the long list of parameters.  Also
add a depth field to keep track of the depth from root.
2013-05-01 16:16:23 +01:00
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2013-05-01 16:16:23 +01:00
2013-04-29 15:37:53 +01:00
2013-05-01 16:16:23 +01:00
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