add const before std::set

Author: maki49

source/module_lr/esolver_lrtd_lcao.cpp

@@ -86,8 +86,8 @@ inline int cal_nupdown_form_occ(const ModuleBase::matrix& wg)
 template<typename T, typename TR>
 void LR::ESolver_LR<T, TR>::parameter_check()const
 {
-    std::set<std::string> lr_solvers = { "dav", "lapack" , "spectrum", "dav_subspace", "cg" };
-    std::set<std::string> xc_kernels = { "rpa", "lda", "pwlda", "pbe", "hf" , "hse" };
+    const std::set<std::string> lr_solvers = { "dav", "lapack" , "spectrum", "dav_subspace", "cg" };
+    const std::set<std::string> xc_kernels = { "rpa", "lda", "pwlda", "pbe", "hf" , "hse" };
     if (lr_solvers.find(this->input.lr_solver) == lr_solvers.end()) {
         throw std::invalid_argument("ESolver_LR: unknown type of lr_solver");
 }
@@ -471,7 +471,7 @@ void LR::ESolver_LR<T, TR>::runner(int istep, UnitCell& cell)
                 // solve the Casida equation
                 LR::HSolver::solve(hlr, this->X[is].template data<T>(), nloc_per_band, nstates,
                     this->pelec->ekb.c + is * nstates, this->input.lr_solver, this->input.lr_thr/*,
-                        !std::set<std::string>({ "hf", "hse" }).count(this->xc_kernel)*/);  //whether the kernel is Hermitian
+                        !const std::set<std::string>({ "hf", "hse" }).count(this->xc_kernel)*/);  //whether the kernel is Hermitian
                 if (input.out_wfc_lr) { write_states(spin_types[is], this->pelec->ekb.c + is * nstates, this->X[is].template data<T>(), nloc_per_band, nstates); }
             }
         }

source/module_lr/potentials/pot_hxc_lrtd.cpp

@@ -25,7 +25,7 @@ namespace LR
 
         this->pot_hartree = LR_Util::make_unique<elecstate::PotHartree>(this->rho_basis_);
 
-        std::set<std::string> local_xc = { "lda", "pwlda", "pbe", "hse" };
+        const std::set<std::string> local_xc = { "lda", "pwlda", "pbe", "hse" };
         if (local_xc.find(this->xc_kernel) != local_xc.end())
         {
             XC_Functional::set_xc_type(this->xc_kernel);    // for hse, (1-alpha) and omega are set here
@@ -34,7 +34,7 @@ namespace LR
 
             if (lr_init_xc_kernel[0] == "file")
             {
-                std::set<std::string> lda_xc = { "lda", "pwlda" };
+                const std::set<std::string> lda_xc = { "lda", "pwlda" };
                 assert(lda_xc.count(this->xc_kernel));
                 const int spinsize = (1 == nspin) ? 1 : 3;
                 std::vector<double> v2rho2(spinsize * nrxx);