clang-tidy: modernize-concat-nested-namespaces (NFC)

wpilibc/src/main/native/include/frc/Filesystem.h

@@ -6,9 +6,8 @@
 
 #include <wpi/SmallVector.h>
 
-namespace frc {
 /** WPILib FileSystem namespace */
-namespace filesystem {
+namespace frc::filesystem {
 
 /**
  * Obtains the current working path that the program was launched with.
@@ -37,5 +36,4 @@ void GetOperatingDirectory(wpi::SmallVectorImpl<char>& result);
  */
 void GetDeployDirectory(wpi::SmallVectorImpl<char>& result);
 
-}  // namespace filesystem
-}  // namespace frc
+}  // namespace frc::filesystem

wpilibc/src/main/native/include/frc/shuffleboard/RecordingController.h

@@ -14,8 +14,7 @@
 
 #include "frc/shuffleboard/ShuffleboardEventImportance.h"
 
-namespace frc {
-namespace detail {
+namespace frc::detail {
 
 class RecordingController final {
  public:
@@ -36,5 +35,4 @@ class RecordingController final {
   std::shared_ptr<nt::NetworkTable> m_eventsTable;
 };
 
-}  // namespace detail
-}  // namespace frc
+}  // namespace frc::detail

wpilibc/src/main/native/include/frc/shuffleboard/ShuffleboardInstance.h

@@ -9,8 +9,7 @@
 #include "frc/shuffleboard/ShuffleboardRoot.h"
 #include "frc/shuffleboard/ShuffleboardTab.h"
 
-namespace frc {
-namespace detail {
+namespace frc::detail {
 
 class ShuffleboardInstance final : public ShuffleboardRoot {
  public:
@@ -37,5 +36,4 @@ class ShuffleboardInstance final : public ShuffleboardRoot {
   std::unique_ptr<Impl> m_impl;
 };
 
-}  // namespace detail
-}  // namespace frc
+}  // namespace frc::detail

wpilibc/src/main/native/include/frc/simulation/CallbackStore.h

@@ -9,8 +9,7 @@
 #include <hal/Value.h>
 #include <wpi/StringRef.h>
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 
 using NotifyCallback = std::function<void(wpi::StringRef, const HAL_Value*)>;
 using ConstBufferCallback = std::function<void(
@@ -73,5 +72,4 @@ class CallbackStore {
   enum CancelType { Normal, Channel, NoIndex };
   CancelType cancelType;
 };
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim

wpilibc/src/main/native/include/frc/simulation/DriverStationSim.h

@@ -11,8 +11,7 @@
 #include "frc/DriverStation.h"
 #include "frc/simulation/CallbackStore.h"
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 
 /**
  * Class to control a simulated driver station.
@@ -241,5 +240,4 @@ class DriverStationSim {
 
   static void ResetData();
 };
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim

wpilibc/src/main/native/include/frc/simulation/RoboRioSim.h

@@ -11,8 +11,7 @@
 
 #include "frc/simulation/CallbackStore.h"
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 
 /**
  * Class to control a simulated RoboRIO.
@@ -126,5 +125,4 @@ class RoboRioSim {
 
   static void ResetData();
 };
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim

wpilibc/src/main/native/include/frc/simulation/SPIAccelerometerSim.h

@@ -8,8 +8,7 @@
 
 #include "frc/simulation/CallbackStore.h"
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 class SPIAccelerometerSim {
  public:
   explicit SPIAccelerometerSim(int index);
@@ -54,5 +53,4 @@ class SPIAccelerometerSim {
  private:
   int m_index;
 };
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim

wpilibc/src/main/native/include/frc/simulation/SimDeviceSim.h

@@ -11,8 +11,7 @@
 #include <hal/SimDevice.h>
 #include <hal/simulation/SimDeviceData.h>
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 
 /**
  * Class to control the simulation side of a SimDevice.
@@ -62,5 +61,4 @@ class SimDeviceSim {
  private:
   HAL_SimDeviceHandle m_handle;
 };
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim

wpilibc/src/main/native/include/frc/simulation/SimHooks.h

@@ -9,8 +9,7 @@
 #include <hal/HALBase.h>
 #include <units/time.h>
 
-namespace frc {
-namespace sim {
+namespace frc::sim {
 
 void SetRuntimeType(HAL_RuntimeType type);
 
@@ -32,5 +31,4 @@ void StepTiming(units::second_t delta);
 
 void StepTimingAsync(units::second_t delta);
 
-}  // namespace sim
-}  // namespace frc
+}  // namespace frc::sim