Use nested namespace

It's a mechanical change to modernize the code base

include/customizer/cell_customizer.hpp

@@ -10,9 +10,7 @@
 
 #include <unordered_set>
 
-namespace osrm
-{
-namespace customizer
+namespace osrm::customizer
 {
 
 class CellCustomizer
@@ -235,7 +233,6 @@ class CellCustomizer
 
     const partitioner::MultiLevelPartition &partition;
 };
-} // namespace customizer
 } // namespace osrm
 
 #endif // OSRM_CELLS_CUSTOMIZER_HPP

include/customizer/cell_metric.hpp

@@ -7,9 +7,7 @@
 #include "util/typedefs.hpp"
 #include "util/vector_view.hpp"
 
-namespace osrm
-{
-namespace customizer
+namespace osrm::customizer
 {
 namespace detail
 {
@@ -26,7 +24,6 @@ template <storage::Ownership Ownership> struct CellMetricImpl
 
 using CellMetric = detail::CellMetricImpl<storage::Ownership::Container>;
 using CellMetricView = detail::CellMetricImpl<storage::Ownership::View>;
-} // namespace customizer
 } // namespace osrm
 
 #endif

include/customizer/customizer.hpp

@@ -3,9 +3,7 @@
 
 #include "customizer/customizer_config.hpp"
 
-namespace osrm
-{
-namespace customizer
+namespace osrm::customizer
 {
 
 class Customizer
@@ -14,7 +12,6 @@ class Customizer
     int Run(const CustomizationConfig &config);
 };
 
-} // namespace customizer
 } // namespace osrm
 
 #endif // OSRM_CUSTOMIZE_CUSTOMIZER_HPP

include/customizer/customizer_config.hpp

@@ -9,9 +9,7 @@
 #include "storage/io_config.hpp"
 #include "updater/updater_config.hpp"
 
-namespace osrm
-{
-namespace customizer
+namespace osrm::customizer
 {
 
 struct CustomizationConfig final : storage::IOConfig
@@ -39,7 +37,6 @@ struct CustomizationConfig final : storage::IOConfig
 
     updater::UpdaterConfig updater_config;
 };
-} // namespace customizer
 } // namespace osrm
 
 #endif // OSRM_CUSTOMIZE_CUSTOMIZER_CONFIG_HPP

include/customizer/edge_based_graph.hpp

@@ -11,9 +11,7 @@
 
 #include <boost/filesystem/path.hpp>
 
-namespace osrm
-{
-namespace customizer
+namespace osrm::customizer
 {
 
 struct EdgeBasedGraphEdgeData
@@ -126,7 +124,6 @@ using MultiLevelEdgeBasedGraph =
     MultiLevelGraph<EdgeBasedGraphEdgeData, storage::Ownership::Container>;
 using MultiLevelEdgeBasedGraphView =
     MultiLevelGraph<EdgeBasedGraphEdgeData, storage::Ownership::View>;
-} // namespace customizer
 } // namespace osrm
 
 #endif

include/customizer/files.hpp

@@ -9,11 +9,7 @@
 
 #include <unordered_map>
 
-namespace osrm
-{
-namespace customizer
-{
-namespace files
+namespace osrm::customizer::files
 {
 
 // reads .osrm.cell_metrics file
@@ -106,8 +102,6 @@ inline void writeGraph(const boost::filesystem::path &path,
     writer.WriteFrom("/mld/connectivity_checksum", connectivity_checksum);
     serialization::write(writer, "/mld/multilevelgraph", graph);
 }
-} // namespace files
-} // namespace customizer
 } // namespace osrm
 
 #endif

include/customizer/serialization.hpp

@@ -9,11 +9,7 @@
 #include "storage/shared_memory_ownership.hpp"
 #include "storage/tar.hpp"
 
-namespace osrm
-{
-namespace customizer
-{
-namespace serialization
+namespace osrm::customizer::serialization
 {
 
 template <storage::Ownership Ownership>
@@ -65,8 +61,6 @@ inline void write(storage::tar::FileWriter &writer,
     storage::serialization::write(writer, name + "/is_backward_edge", graph.is_backward_edge);
     storage::serialization::write(writer, name + "/node_to_edge_offset", graph.node_to_edge_offset);
 }
-} // namespace serialization
-} // namespace customizer
 } // namespace osrm
 
 #endif