fix warning

warning: `error: not eliding copy on return [-Werror,-Wnrvo]`

Author: psychocoderHPC

include/alpaka/core/DemangleTypeNames.hpp

@@ -80,7 +80,7 @@ namespace alpaka::core
             std::copy(embeddedType.data() + start, embeddedType.data() + end, storage.data());
             storage[length] = '\0';
 
-            return storage;
+            return std::move(storage);
         }
 
         // Store the demangled type name as a null-terminated array of bytes.

include/alpaka/mem/view/Traits.hpp

@@ -97,7 +97,7 @@ namespace alpaka
             if constexpr(dim > 1)
                 for(TIdx i = TDim::value - 1; i > 0; i--)
                     pitchBytes[i - 1] = extent[i] * pitchBytes[i];
-            return pitchBytes;
+            return std::move(pitchBytes);
         }
 
         //! Calculate the pitches from the extents and the one-dimensional pitch.
@@ -121,7 +121,7 @@ namespace alpaka
             if constexpr(dim > 2)
                 for(TIdx i = TDim::value - 2; i > 0; i--)
                     pitchBytes[i - 1] = extent[i] * pitchBytes[i];
-            return pitchBytes;
+            return std::move(pitchBytes);
         }
 
     } // namespace detail

include/alpaka/workdiv/WorkDivHelpers.hpp

@@ -79,7 +79,7 @@ namespace alpaka
                 }
             }
 
-            return divisorSet;
+            return std::move(divisorSet);
         }
     } // namespace detail
 
@@ -160,7 +160,7 @@ namespace alpaka
             Vec r;
             for(DimLoopInd i(0u); i < TDim::value; ++i)
                 r[i] = core::divCeil(gridElemExtent[i], clippedThreadElemExtent[i]);
-            return r;
+            return std::move(r);
         }();
 
         ///////////////////////////////////////////////////////////////////
@@ -278,7 +278,7 @@ namespace alpaka
             Vec r;
             for(DimLoopInd i = 0; i < TDim::value; ++i)
                 r[i] = core::divCeil(gridThreadExtent[i], blockThreadExtent[i]);
-            return r;
+            return std::move(r);
         }();