boards/nucleo: move licence in .h files to SPDX

boards/nucleo-c031c6/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2024 BISSELL Homecare, Inc.
+ * SPDX-FileCopyrightText: 2024 BISSELL Homecare, Inc.
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f030r8/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f031k6/include/periph_conf.h

@@ -1,9 +1,7 @@
 /*
- * Copyright (C) 2017  Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2017  OTA keys
+ * SPDX-FileCopyrightText: 2017 OTA keys
- * This file is subject to the terms and conditions of the GNU Lesser
+ * SPDX-License-Identifier: LGPL-2.1-only
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f042k6/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016  OTA keys
+ * SPDX-FileCopyrightText: 2016 OTA keys
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f070rb/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2016 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2016 Freie Universität Berlin
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f072rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2015  Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2015 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f091rc/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2015  Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2015 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f103rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2015 TriaGnoSys GmbH
+ * SPDX-FileCopyrightText: 2015 TriaGnoSys GmbH
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f207zg/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016-2017  OTA keys S.A.
+ * SPDX-FileCopyrightText: 2016-2017 OTA keys S.A.
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f302r8/include/periph_conf.h

@@ -1,11 +1,8 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2015 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2015 Freie Universität Berlin
- * Copyright (C) 2015 Hamburg University of Applied Sciences
+ * SPDX-FileCopyrightText: 2015 Hamburg University of Applied Sciences
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f303k8/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017   Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f303re/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2015  Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2015 Freie Universität Berlin
- * Copyright (C) 2015 Hamburg University of Applied Sciences
+ * SPDX-FileCopyrightText: 2015 Hamburg University of Applied Sciences
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f303ze/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f334r8/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2015  Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2015 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f401re/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2015 Lari Lehtomäki
+ * SPDX-FileCopyrightText: 2015 Lari Lehtomäki
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f410rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f411re/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f412zg/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- * Copyright (C) 2017 OTA keys S.A.
+ * SPDX-FileCopyrightText: 2017 OTA keys S.A.
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f413zh/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- * Copyright (C) 2017 OTA keys S.A.
+ * SPDX-FileCopyrightText: 2017 OTA keys S.A.
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f429zi/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f439zi/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2022 Inria
+ * SPDX-FileCopyrightText: 2022 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f446re/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2016 Inria
+ * SPDX-FileCopyrightText: 2016 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f446ze/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f722ze/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f746zg/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-f767zi/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-g070rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-g071rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-g431rb/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-g474re/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l011k4/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l031k6/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l053r8/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l073rz/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l152re/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2014-2016 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2014-2016 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l412kb/include/periph_conf.h

@@ -1,11 +1,8 @@
 /*
- * Copyright (C) 2019  twostairs
+ * SPDX-FileCopyrightText: 2019 twostairs
- * Copyright (C) 2017  Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2017  OTA keys
+ * SPDX-FileCopyrightText: 2017 OTA keys
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l432kc/include/periph_conf.h

@@ -1,10 +1,7 @@
 /*
- * Copyright (C) 2017  Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2017  OTA keys
+ * SPDX-FileCopyrightText: 2017 OTA keys
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l433rc/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l452re/include/periph_conf.h

@@ -1,12 +1,9 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2017 HAW-Hamburg
+ * SPDX-FileCopyrightText: 2017 HAW-Hamburg
- * Copyright (C) 2018 Fundacion Inria Chile
+ * SPDX-FileCopyrightText: 2018 Fundacion Inria Chile
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l476rg/include/periph_conf.h

@@ -1,11 +1,8 @@
 /*
- * Copyright (C) 2017 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- * Copyright (C) 2017 HAW-Hamburg
+ * SPDX-FileCopyrightText: 2017 HAW-Hamburg
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l496zg/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2017 Inria
+ * SPDX-FileCopyrightText: 2017 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l4r5zi/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2018 Inria
+ * SPDX-FileCopyrightText: 2018 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-l552ze-q/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2020 Inria
+ * SPDX-FileCopyrightText: 2020 Inria
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-u575zi-q/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2024 TU Dresden
+ * SPDX-FileCopyrightText: 2024 TU Dresden
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-wl55jc/board.c

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2021  Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2021 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 /**

boards/nucleo-wl55jc/include/arduino_iomap.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2021 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2021 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-wl55jc/include/board.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2021 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2021 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-wl55jc/include/gpio_params.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2021 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2021 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once

boards/nucleo-wl55jc/include/periph_conf.h

@@ -1,9 +1,6 @@
 /*
- * Copyright (C) 2021 Freie Universität Berlin
+ * SPDX-FileCopyrightText: 2021 Freie Universität Berlin
- *
+ * SPDX-License-Identifier: LGPL-2.1-only
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
  */
 
 #pragma once