make_array.hpp

/*********************************************************************
 *
 * Linear Arrangement Library - A library that implements a collection
 * algorithms for linear arrangments of graphs.
 *
 * Copyright (C) 2019 - 2024
 *
 * This file is part of Linear Arrangement Library. The full code is available
 * at:
 *      https://github.com/LAL-project/linear-arrangement-library.git
 *
 * Linear Arrangement Library is free software: you can redistribute it
 * and/or modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Linear Arrangement Library is distributed in the hope that it will be
 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Linear Arrangement Library.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contact:
 *
 *     Lluís Alemany Puig (lluis.alemany.puig@upc.edu)
 *         LQMC (Quantitative, Mathematical, and Computational Linguisitcs)
 *         CQL (Complexity and Quantitative Linguistics Lab)
 *         Jordi Girona St 1-3, Campus Nord UPC, 08034 Barcelona.   CATALONIA, SPAIN
 *         Webpage: https://cqllab.upc.edu/people/lalemany/
 *
 *     Ramon Ferrer i Cancho (rferrericancho@cs.upc.edu)
 *         LQMC (Quantitative, Mathematical, and Computational Linguisitcs)
 *         CQL (Complexity and Quantitative Linguistics Lab)
 *         Office 220, Omega building
 *         Jordi Girona St 1-3, Campus Nord UPC, 08034 Barcelona.   CATALONIA, SPAIN
 *         Webpage: https://cqllab.upc.edu/people/rferrericancho/
 *
 ********************************************************************/
 
#pragma once
 
// C++ includes
#include <array>
 
namespace lal {
namespace detail {
 
template <typename T, std::size_t size, T v, std::size_t... I>
[[nodiscard]] constexpr std::array<T, size> make_array_with_value_impl
(std::index_sequence<I...>)
noexcept
{
    std::array<T, size> a;
    ((a[I] = v), ...);
    return a;
}
 
template <typename T, std::size_t array_size, T value_to_fill_with>
[[nodiscard]] constexpr std::array<T, array_size> make_array_with_value()
noexcept
{
    return
    make_array_with_value_impl<T, array_size, value_to_fill_with>
        (std::make_integer_sequence<std::size_t, array_size>{});
}
 
template <typename T, T... ARGS>
[[nodiscard]] constexpr std::array<T, sizeof...(ARGS)> make_array() noexcept {
    return std::array<T, sizeof...(ARGS)>{ARGS...};
}
 
} // -- namespace detail
} // -- namespace lal