ypename TSPVertexVisitor&gt;
void metric_tsp_approx(VertexListGraph&amp; g, Weightmap w,
    TSPVertexVisitor vis)

template&lt;typename VertexListGraph, typename WeightMap,
    typename VertexIndexMap, typename TSPVertexVisitor&gt;
void metric_tsp_approx(VertexListGraph&amp; g, WeightMap w, VertexIndexMap id,
    TSPVertexVisitor vis)

template&lt;typename VertexListGraph, typename WeightMap,
    typename TSPVertexVisitor&gt;
void metric_tsp_approx_from_vertex(VertexListGraph&amp; g,
    typename graph_tra