use std::move() to avoid extra copy of temporaries

src/ELECTRODE/fix_electrode_conp.cpp

@@ -915,20 +915,20 @@ void FixElectrodeConp::update_charges()
         a = ele_ele_interaction(q_local);
         r = add_nlocalele(b, a);
       } else {
-        r = add_nlocalele(r, scale_vector(alpha, y));
+        r = add_nlocalele(r, scale_vector(alpha, std::move(y)));
       }
       auto p = constraint_projection(r);
       double dot_new = dot_nlocalele(r, p);
-      d = add_nlocalele(p, scale_vector(dot_new / dot_old, d));
+      d = add_nlocalele(std::move(p), scale_vector(dot_new / dot_old, d));
       delta = dot_nlocalele(r, d);
       dot_old = dot_new;
     }
-    recompute_potential(b, q_local);
+    recompute_potential(std::move(b), q_local);
     if (delta > cg_threshold && comm->me == 0) error->warning(FLERR, "CG threshold not reached");
   } else {
     error->all(FLERR, "This algorithm is not implemented, yet");
   }
-  set_charges(q_local);
+  set_charges(std::move(q_local));
   update_time += MPI_Wtime() - start;
 }
 

src/GRANULAR/granular_model.cpp

@@ -32,6 +32,7 @@
 
 #include <cmath>
 #include <cstring>
+#include <utility>
 
 using namespace LAMMPS_NS;
 using namespace Granular_NS;
@@ -333,11 +334,11 @@ void GranularModel::read_restart(FILE *fp)
       utils::sfread(FLERR, &num_char, sizeof(int), 1, fp, nullptr, error);
     MPI_Bcast(&num_char, 1, MPI_INT, 0, world);
 
-    std::string model_name (num_char, ' ');
+    std::string model_name(num_char, ' ');
     if (comm->me == 0)
       utils::sfread(FLERR, const_cast<char*>(model_name.data()), sizeof(char),num_char, fp, nullptr, error);
     MPI_Bcast(const_cast<char*>(model_name.data()), num_char, MPI_CHAR, 0, world);
-    construct_sub_model(model_name, (SubModelType) i);
+    construct_sub_model(std::move(model_name), (SubModelType) i);
 
     if (comm->me == 0)
       utils::sfread(FLERR, &num_coeff, sizeof(int), 1, fp, nullptr, error);

src/reader_native.cpp

@@ -289,7 +289,7 @@ bigint ReaderNative::read_header(double box[3][3], int &boxinfo, int &triclinic,
     labelline = line + strlen("ITEM: ATOMS ");
   }
 
-  Tokenizer tokens(labelline);
+  Tokenizer tokens(std::move(labelline));
   std::map<std::string, int> labels;
   nwords = 0;