Acts/Utilities/ArrayHelpers.hpp

0001 // This file is part of the ACTS project.
0002 //
0003 // Copyright (C) 2016 CERN for the benefit of the ACTS project
0004 //
0005 // This Source Code Form is subject to the terms of the Mozilla Public
0006 // License, v. 2.0. If a copy of the MPL was not distributed with this
0007 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
0008
0009 #pragma once
0010
0011 #include <array>
0012
0013 namespace Acts {
0014 ///  @brief creates an array of type T and size N and assigns all elements to the parsed
0015 ///         default value def_val. This basically allows for inline construction
0016 ///         and initialization of class-member arrays
0017 ///  @param defVal: Default value to assign
0018 ///  @return Array filled with the default value
0019 template <typename T, std::size_t N>
0020 constexpr std::array<T, N> filledArray(const T& defVal) {
0021   std::array<T, N> arr{};
0022   arr.fill(defVal);
0023   return arr;
0024 }
0025 }  // namespace Acts