Using CHGL in Code

Using CHGL

Import CHGL into your project like such...

use CHGL;

Instantiating a Hypergraph

const numVertices = 1024;
const numEdges = 2048;
const distribution = new unmanaged Cyclic(startIdx=1);
var graph = new AdjListHyperGraph(numVertices, numEdges, distribution);

Instantiating via a PropertyMap

type VertexProperty;
type EdgeProperty;
var pmap = new PropertyMap(VertexProperty, EdgeProperty);
const distribution = new unmanaged Block(...);
forall (x,y) in someData { 
   pmap.addVertexProperty(x);
   pmap.addEdgeProperty(y);
}
var graph = new AdjListHyperGraph(pmap, distribution);

Inserting into Hypergraph

// Obtain index from property map (optional)
const vp : VertexProperty;
const ep : EdgeProperty;
const vIdx = pmap.getVertexProperty(vp);
const eIdx = pmap.getEdgeProperty(ep);
// Add edge from vertex to edge
graph.addInclusion(vIdx, eIdx);

Iterating Over Hypergraph

// Parallel + Distributed Iteration over vertices
forall v in graph.getVertices() {
   // Serial Iteration over edges that v is incident in
   for e in graph.incidence(v) {
      // Print degree of edge
      writeln(e, " has degree ", graph.degree(e));
   }
}