cpp_function.h

#pragma once

/****************************************************************************
**  Copyright (c) 2023, Adel Kara Slimane <adel.ks@zegrapher.com>
**
**  This file is part of ZeCalculator's source code.
**
**  ZeCalculators is free software: you may copy, redistribute 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.
**
**  This file 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 <http://www.gnu.org/licenses/>.
**
****************************************************************************/


#include <zecalculator/parsing/types.h>
#include <zecalculator/utils/utils.h>

#include <cstddef>
#include <span>

namespace zc {

template <parsing::Type type>
class MathWorld;

template <size_t args_num>
  requires (args_num > 0)
struct CppFunction
{
  typename utils::math_func_signature_t<args_num> f_ptr;

  double operator()(std::span<const double, args_num> vals) const;
  double operator()(std::array<double, args_num> vals) const;

  bool operator == (const CppFunction&) const = default;
};

template <class... DBL>
  requires (std::is_same_v<DBL, double> and ...)
CppFunction(double(*)(DBL...)) -> CppFunction<sizeof...(DBL)>;

} // namespace zc