logic.h

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/* *****************************************************************************
 * kblib is a general utility library for C++14 and C++17, intended to provide
 * performant high-level abstractions and more expressive ways to do simple
 * things.
 *
 * Copyright (c) 2021 killerbee
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * ****************************************************************************/
 
#ifndef KBLIB_LOGIC_H
#define KBLIB_LOGIC_H
 
#include "tdecl.h"
 
#include <type_traits>
 
namespace kblib {
 
template <bool A, bool B>
struct implies : std::integral_constant<bool, true> {};
 
template <>
struct implies<true, false> : std::integral_constant<bool, false> {};
 
#if KBLIB_USE_CXX17
template <bool A, bool B>
constexpr inline bool implies_v = implies<A, B>::value;
 
template <bool... args>
constexpr inline bool conjunction_v = (args and ...);
#endif
 
} // namespace kblib
 
#endif // KBLIB_LOGIC_H