Method decreaseVertexDegree

gbbs/graph.h:198–201

degree must be <= old_degree

  // degree must be <= old_degree
  void decreaseVertexDegree(uintE id, uintE degree) {
    assert(degree <= vertices[id].degree);
    vertices[id].degree = degree;
  }

  void zeroVertexDegree(uintE id) { decreaseVertexDegree(id, 0); }