#1396 Fix three warnings (one more elegantly than previously where the warning...

#1396 Fix three warnings (one more elegantly than previously where the warning was neutralized locally).

Sources/FiniteElement/Nodes_and_dofs/NodeBearer.cpp

@@ -61,9 +61,9 @@ namespace MoReFEM
     {
         assert(Ndof > 0);
         
-        auto&& node_ptr = std::make_shared<Node>(shared_from_this(),
-                                                 extended_unknown,
-                                                 Ndof);
+        auto node_ptr = std::make_shared<Node>(shared_from_this(),
+                                               extended_unknown,
+                                               Ndof);
         
         node_list_.push_back(node_ptr);
         

Sources/Geometry/Domain/MeshLabel.cpp

@@ -33,7 +33,7 @@ namespace MoReFEM
                 return oconv.str();
             }
             
-            return description;
+            return std::move(description);
         }
         
         

Sources/Utilities/LuaOptionFile/LuaOptionFile.hxx

@@ -310,21 +310,10 @@ namespace MoReFEM
     {
         if constexpr (Utilities::IsSpecializationOf<std::tuple, T>())
         {
-            #  ifdef MOREFEM_LLVM_CLANG
-            PRAGMA_DIAGNOSTIC(push)
-            PRAGMA_DIAGNOSTIC(ignored "-Wunused-lambda-capture")
-            //< because LLVM clang issues an erroneous warning with 'this' capture below.
-            #  endif // MOREFEM_LLVM_CLANG
-
             // See https://stackoverflow.com/questions/16387354/template-tuple-calling-a-function-on-each-element.
             std::apply([this](auto ...x)
-                       { (..., PushOnStack(x)); },
+                       { (..., this->PushOnStack(x)); },
                        value);
-
-            #  ifdef MOREFEM_LLVM_CLANG
-            PRAGMA_DIAGNOSTIC(pop)
-            #  endif // MOREFEM_LLVM_CLANG
-
         }
         else
         {