AP_BattMonitor: replace header guard with pragma once

libraries/AP_BattMonitor/AP_BattMonitor.h

@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AP_BATTMONITOR_H
-#define AP_BATTMONITOR_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -126,4 +125,3 @@ private:
     AP_BattMonitor_Backend *drivers[AP_BATT_MONITOR_MAX_INSTANCES];
     uint8_t     _num_instances;                                     /// number of monitors
 };
-#endif  // AP_BATTMONITOR_H

libraries/AP_BattMonitor/AP_BattMonitor_Analog.h

@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AP_BATTMONITOR_ANALOG_H
-#define AP_BATTMONITOR_ANALOG_H
+#pragma once
 
 #include <AP_ADC/AP_ADC.h>                 // ArduPilot Mega Analog to Digital Converter Library
 #include "AP_BattMonitor.h"
@@ -97,4 +96,3 @@ protected:
     AP_HAL::AnalogSource *_volt_pin_analog_source;
     AP_HAL::AnalogSource *_curr_pin_analog_source;
 };
-#endif  // AP_BATTMONITOR_ANALOG_H

libraries/AP_BattMonitor/AP_BattMonitor_Backend.h

@@ -13,9 +13,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-
-#ifndef __AP_BATTMONITOR_BACKEND_H__
-#define __AP_BATTMONITOR_BACKEND_H__
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_HAL/AP_HAL.h>
@@ -48,4 +46,3 @@ protected:
     AP_BattMonitor::BattMonitor_State   &_state;    // reference to this instances state (held in the front-end)
     uint8_t                              _instance; // this instance
 };
-#endif // __AP_BATTMONITOR_BACKEND_H__

libraries/AP_BattMonitor/AP_BattMonitor_Bebop.h

@@ -13,9 +13,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-
-#ifndef __AP_BATTMONITOR_BEBOP_H__
-#define __AP_BATTMONITOR_BEBOP_H__
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_HAL/AP_HAL.h>
@@ -48,4 +46,3 @@ private:
     float _filter_voltage(float vbat_raw);
     float _compute_battery_percentage(float vbat);
 };
-#endif // __AP_BATTMONITOR_BEBOP_H__

libraries/AP_BattMonitor/AP_BattMonitor_SMBus.h

@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AP_BATTMONITOR_SMBUS_H
-#define AP_BATTMONITOR_SMBUS_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -26,5 +25,3 @@ public:
 // include specific implementations
 #include "AP_BattMonitor_SMBus_PX4.h"
 #include "AP_BattMonitor_SMBus_I2C.h"
-
-#endif // AP_BATTMONITOR_SMBUS_H

libraries/AP_BattMonitor/AP_BattMonitor_SMBus_I2C.h

@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AP_BATTMONITOR_SMBUS_I2C_H
-#define AP_BATTMONITOR_SMBUS_I2C_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -30,5 +29,3 @@ private:
     //  buff is the data that was read or will be written
     uint8_t get_PEC(const uint8_t i2c_addr, uint8_t cmd, bool reading, const uint8_t buff[], uint8_t len) const;
 };
-
-#endif // AP_BATTMONITOR_SMBUS_I2C_H

libraries/AP_BattMonitor/AP_BattMonitor_SMBus_PX4.h

@@ -15,8 +15,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-#ifndef AP_BATTMONITOR_SMBUS_PX4_H
-#define AP_BATTMONITOR_SMBUS_PX4_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -40,5 +39,3 @@ private:
     int         _batt_fd;           // file descriptor
     bool        _capacity_updated;  // capacity info read
 };
-
-#endif // AP_BATTMONITOR_SMBUS_PX4_H