real2complex.hpp

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/*
 * eDSP, A cross-platform Digital Signal Processing library written in modern C++.
 * Copyright (C) 2018 Mohammed Boujemaoui Boulaghmoudi, All rights reserved.
 *
 * 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 width
 * this program.  If not, see <http://www.gnu.org/licenses/>
 *
 * File: real2complex.hpp
 * Author: Mohammed Boujemaoui
 * Date: 1/9/2018
 */
#ifndef EDSP_REAL2COMPLEX_HPP
#define EDSP_REAL2COMPLEX_HPP

#include <edsp/meta/iterator.hpp>
#include <algorithm>
#include <complex>

namespace edsp { inline namespace converter {

    template <typename T>
    constexpr std::complex<T> real2complex(T real, T imag = static_cast<T>(0)) noexcept {
        return std::complex<T>(real, imag);
    }

    template <typename InputIt, typename OutputIt>
    constexpr void real2complex(InputIt first, InputIt last, OutputIt d_first) {
        using input_t  = meta::value_type_t<InputIt>;
        using output_t = meta::value_type_t<OutputIt>;
        std::transform(first, last, d_first, [](const input_t value) -> output_t { return value; });
    }

    template <typename InputIt, typename OutputIt>
    constexpr void real2complex(InputIt first1, InputIt last1, InputIt first2, OutputIt d_first) {
        using input_t  = meta::value_type_t<InputIt>;
        using output_t = meta::value_type_t<OutputIt>;
        std::transform(first1, last1, first2, d_first, [](const input_t real, const input_t imag) -> output_t {
            return {real, imag};
        });
    }

}} // namespace edsp::converter

#endif // EASDY_REAL2COMPLEX_HPP