没有匹配的函数来调用“ make_function”

Question

我对编码还比较陌生，有一些我通常不太了解的问题。 该代码将显示如下：

double SlowPionClusterCharge;
double cid;

StoreArray<PXDCluster> getPionClusters() {
  //float pxdClusterCharge;
  //float cid;
  float mcPDG;

  StoreArray<RecoTrack> m_RecoTracks;

  for (RecoTrack& recoTrack : m_RecoTracks) {
    for (PXDCluster& pxdcl : recoTrack.getRelationsFrom<PXDCluster>("PXDClusters")) {
      if (mcPDG == 211) {
        RecoTrack* track = recoTrack.getRelatedFrom<RecoTrack>("Tracks");
      } else {
        continue;
      }
      SlowPionClusterCharge = pxdcl.getCharge();
      cid = pxdcl.getSensorID().getID();
      if (pxdClusterCharge == 0) {
        continue;
      }
    }
  }
}

VARIABLE_GROUP("PXD clusters");
REGISTER_VARIABLE("SlowPionClusterCharge(i)", SlowPionClusterCharge,   "[EventBased] cluster charge of slow pion in a event");

错误消息是：

error: no matching function for call to 'make_function'
REGISTER_VARIABLE("SlowPionClusterCharge(i)", SlowPionClusterCharge, "[EventBased] cluster charge of slow pion in a event");

/mnt/scratch/basf2/development/include/analysis/VariableManager/Manager.h:295:74: note: expanded from macro 'REGISTER_VARIABLE'
static Proxy VARMANAGER_MAKE_UNIQUE(_variableproxy)(std::string(name), Belle2::Variable::make_function(function), std::string(description));