Fix CUDA 13.1 compile failure: use trailing return types for dependent name resolution

src/muda/buffer/details/graph_buffer_2d_view.inl

@@ -7,7 +7,7 @@ MUDA_INLINE void ComputeGraphVar<Buffer2DView<T>>::update(const RWView& view)
     m_value = view;
 }
 template <typename T>
-MUDA_INLINE ComputeGraphVar<Buffer2DView<T>>& ComputeGraphVar<Buffer2DView<T>>::operator=(const RWView& view)
+MUDA_INLINE auto ComputeGraphVar<Buffer2DView<T>>::operator=(const RWView& view) -> ComputeGraphVar<VarType>&
 {
     update(view);
     return *this;

src/muda/buffer/details/graph_buffer_3d_view.inl

@@ -7,7 +7,7 @@ MUDA_INLINE void ComputeGraphVar<Buffer3DView<T>>::update(const RWView& view)
     m_value = view;
 }
 template <typename T>
-MUDA_INLINE ComputeGraphVar<Buffer3DView<T>>& ComputeGraphVar<Buffer3DView<T>>::operator=(const RWView& view)
+MUDA_INLINE auto ComputeGraphVar<Buffer3DView<T>>::operator=(const RWView& view) -> ComputeGraphVar<VarType>&
 {
     update(view);
     return *this;

src/muda/buffer/details/graph_buffer_view.inl

@@ -7,7 +7,7 @@ MUDA_INLINE void ComputeGraphVar<BufferView<T>>::update(const RWView& view)
     m_value = view;
 }
 template <typename T>
-MUDA_INLINE ComputeGraphVar<BufferView<T>>& ComputeGraphVar<BufferView<T>>::operator=(const RWView& view)
+MUDA_INLINE auto ComputeGraphVar<BufferView<T>>::operator=(const RWView& view) -> ComputeGraphVar<VarType>&
 {
     update(view);
     return *this;

src/muda/buffer/details/graph_var_view.inl

@@ -7,7 +7,7 @@ MUDA_INLINE void ComputeGraphVar<VarView<T>>::update(const RWView& view)
     m_value = view;
 }
 template <typename T>
-MUDA_INLINE ComputeGraphVar<VarView<T>>& ComputeGraphVar<VarView<T>>::operator=(const RWView& view)
+MUDA_INLINE auto ComputeGraphVar<VarView<T>>::operator=(const RWView& view) -> ComputeGraphVar<VarType>&
 {
     update(view);
     return *this;