utility/views/convert.hpp

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// SPDX-FileCopyrightText: 2006-2024 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2024 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause
 
#pragma once
 
#include <concepts>
#include <ranges>
 
#include <seqan3/utility/concept.hpp>
 
namespace seqan3::views
{
template <typename out_t>
inline constexpr auto convert = std::views::transform(
    [](auto && in) -> out_t
    {
        static_assert(std::convertible_to<decltype(in) &&, out_t> || explicitly_convertible_to<decltype(in) &&, out_t>,
                      "The reference type of the input to views::convert is not convertible to out_t.");
 
        if constexpr (std::convertible_to<decltype(in) &&, out_t>)
            return std::forward<decltype(in)>(in);
        else
            return static_cast<out_t>(std::forward<decltype(in)>(in));
    });
 
} // namespace seqan3::views