C++ Particle_Vector::rbegin方法代码示例

Return_Value::code Signal_Process_FS_QED_Correction::Treat
(Blob_List * bloblist, double & weight)
{
  if (!m_on) return Return_Value::Nothing;
  if (bloblist->empty()) {
    msg_Error()<<"Signal_Process_FS_QED_Correction::Treat"
	       <<"("<<bloblist<<","<<weight<<"): "<<endl
               <<"   Blob list contains "<<bloblist->size()<<" entries."<<endl
               <<"   Continue and hope for the best."<<endl;
    return Return_Value::Error;
  }
  // look for QCD corrected hard process in need for QED
  Blob * sigblob(bloblist->FindLast(btp::Shower));
  if (!sigblob) return Return_Value::Nothing;
  // if already treated -> nothing to do
  if (sigblob->TypeSpec()=="YFS-type_QED_Corrections_to_ME")
    return Return_Value::Nothing;
  if (sigblob->TypeSpec()=="setting_leptons_on-shell")
    return Return_Value::Nothing;
  // extract FS leptons
  // two vectors -> the ones from the blob and the ones to be massive
  DEBUG_FUNC(m_qed);
  Particle_Vector fslep(sigblob->GetOutParticles());
  Particle_Vector mfslep;
  for (Particle_Vector::iterator it=fslep.begin();it!=fslep.end();) {
    if ((*it)->Flav().Strong() || (*it)->Flav().IsDiQuark() || 
	(*it)->DecayBlob()!=NULL) {
      fslep.erase(it);
    }
    else {
      mfslep.push_back(new Particle(-1,(*it)->Flav(),(*it)->Momentum(),'F'));
      (*mfslep.rbegin())->SetNumber(0);
      (*mfslep.rbegin())->SetOriginalPart(*it);
      (*mfslep.rbegin())->SetFinalMass((*it)->FinalMass());
      ++it;
    }
  }
  // if no leptons, nothing to do
  // if only one lepton, cannot do anything
  if (fslep.size()<2) {
    sigblob->UnsetStatus(blob_status::needs_extraQED);
    for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
      delete *it;
    return Return_Value::Nothing;
  }
  // if switched off or no need for QED stop here and build a blob
  if (!m_qed || !sigblob->Has(blob_status::needs_extraQED)) {
    Blob * onshellblob = bloblist->AddBlob(btp::QED_Radiation);
    onshellblob->SetTypeSpec("setting_leptons_on-shell");
    if (sigblob->Has(blob_status::needs_extraQED))
      sigblob->UnsetStatus(blob_status::needs_extraQED);
    for (Particle_Vector::iterator it=fslep.begin();it!=fslep.end();++it) {
      (*it)->SetInfo('H');
      (*it)->SetStatus(part_status::decayed);
      onshellblob->AddToInParticles(*it);
    }
    for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it) {
      onshellblob->AddToOutParticles(*it);
    }
    onshellblob->SetStatus(blob_status::needs_hadronization);
    return Return_Value::Success;
  }
  // put them on-shell (spoils consistency of pertubative calculation,
  // but necessary for YFS)
  if (!PutOnMassShell(mfslep)) {
    msg_Error()<<"Signal_Process_FS_QED_Correction::Treat("
	       <<bloblist<<","<<weight<<"): \n"
               <<"  Leptons could not be put on their mass shell.\n"
               <<"  Trying new event.\n"
               <<"  The event contained a ";
    for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
       msg_Error()<<(*it)->Flav().ShellName()<<"-";
    if (mfslep.size()==2) msg_Error()<<"pair";
    else                  msg_Error()<<"set";
    msg_Error()<<" of too little invariant mass to be put\n"
	       <<"  on their mass shell. If you are sensitive to this specific"
	       <<" signature consider\n  to set the respective particles"
	       <<" massive in the perturbative calculation using\n"
	       <<"  'MASSIVE[<id>]=1' to avoid this problem.\n";
    for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
      delete *it;
    return Return_Value::New_Event;
  }
  // build effective verteces for resonant production
  // use subprocess infos if possible
  Blob_Vector blobs = BuildResonantBlobs(mfslep);
  // add radiation
  for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it) {
    // do nothing if no resonance determined
    if ((*it)->InParticle(0)->Flav().Kfcode()!=kf_none) {
      (*it)->SetStatus(blob_status::needs_extraQED);
      if (!p_sphotons->AddRadiation(*it)) {
        msg_Error()<<"Signal_Process_FS_QED_Correction::Treat("<<bloblist
                   <<","<<weight<<"): "<<endl
                   <<"  Higher order QED corrections failed."<<endl
                   <<"  Retrying event."<<endl;
        for (Particle_Vector::iterator it=mfslep.begin();it!=mfslep.end();++it)
          delete *it;
        for (Blob_Vector::iterator it=blobs.begin();it!=blobs.end();++it)
          delete *it;
//.........这里部分代码省略.........