goldberg_emulator/overlay_experimental/System/ConstExpressions.hpp

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2022-08-05 06:06:42 +00:00
/*
* Copyright (C) Nemirtingas
* This file is part of System.
*
* System is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* System 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with System; if not, see
* <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <cstddef> // size_t
namespace System {
namespace ConstExpr {
template<typename T, size_t N>
constexpr size_t CountOf(T(&)[N])
{
return N;
}
template<typename T, size_t N>
constexpr size_t StrLen(T(&)[N])
{
return N-1;
}
// Sum of all parameter pack sizeof
template <typename... Ts>
constexpr size_t size_of = 0;
template <typename T, typename... Ts>
constexpr size_t size_of<T, Ts...> = sizeof(T) + size_of<Ts...>;
}
}