Review comments

Author: AlexanderKalistratov

dpnp/backend/extensions/statistics/histogram_common.cpp

@@ -52,10 +52,7 @@ using ext::validation::check_size_at_least;
 using ext::validation::common_checks;
 using ext::validation::name_of;
 
-namespace statistics
-{
-
-namespace histogram
+namespace statistics::histogram
 {
 
 void validate(const usm_ndarray &sample,
@@ -200,5 +197,4 @@ uint32_t get_local_hist_copies_count(uint32_t loc_mem_size_in_items,
     return local_hist_count;
 }
 
-} // namespace histogram
-} // namespace statistics
+} // namespace statistics::histogram

dpnp/backend/extensions/statistics/histogram_common.hpp

@@ -40,10 +40,7 @@ using ext::common::AtomicOp;
 using ext::common::IsNan;
 using ext::common::Less;
 
-namespace statistics
-{
-
-namespace histogram
+namespace statistics::histogram
 {
 
 template <typename T, int Dims>
@@ -370,5 +367,4 @@ uint32_t get_local_hist_copies_count(uint32_t loc_mem_size_in_items,
                                      uint32_t local_size,
                                      uint32_t hist_size_in_items);
 
-} // namespace histogram
-} // namespace statistics
+} // namespace statistics::histogram

dpnp/backend/extensions/statistics/histogramdd.hpp

@@ -31,9 +31,7 @@
 #include "dpctl4pybind11.hpp"
 #include "ext/dispatch_table.hpp"
 
-namespace statistics
-{
-namespace histogram
+namespace statistics::histogram
 {
 struct Histogramdd
 {
@@ -63,5 +61,4 @@ struct Histogramdd
 };
 
 void populate_histogramdd(py::module_ m);
-} // namespace histogram
-} // namespace statistics
+} // namespace statistics::histogram

dpnp/backend/extensions/statistics/sliding_window1d.cpp

@@ -43,10 +43,7 @@ using ext::validation::check_num_dims;
 using ext::validation::common_checks;
 using ext::validation::name_of;
 
-namespace statistics
-{
-
-namespace sliding_window1d
+namespace statistics::sliding_window1d
 {
 
 void validate(const usm_ndarray &a,
@@ -90,5 +87,4 @@ void validate(const usm_ndarray &a,
     }
 }
 
-} // namespace sliding_window1d
-} // namespace statistics
+} // namespace statistics::sliding_window1d

dpnp/backend/extensions/statistics/sliding_window1d.hpp

@@ -38,10 +38,7 @@ using dpctl::tensor::usm_ndarray;
 using ext::common::Align;
 using ext::common::CeilDiv;
 
-namespace statistics
-{
-
-namespace sliding_window1d
+namespace statistics::sliding_window1d
 {
 
 template <typename T, uint32_t Size>
@@ -669,5 +666,4 @@ void validate(const usm_ndarray &a,
               const usm_ndarray &out,
               const size_t l_pad,
               const size_t r_pad);
-} // namespace sliding_window1d
-} // namespace statistics
+} // namespace statistics::sliding_window1d