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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/* Copyright (C) 2021
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* swift Project Community / Contributors
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*
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* This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
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* directory of this distribution. No part of swift project, including this file, may be copied, modified, propagated,
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* or distributed except according to the terms contained in the LICENSE file.
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*/
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//! \file
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#ifndef BLACKMISC_TUPLE_H
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#define BLACKMISC_TUPLE_H
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#include <utility>
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#include <stddef.h>
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//! \cond
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namespace BlackMisc::Private
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{
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/*
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* Own minimal implementation of std::tuple with very limited functionality.
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* Only used to reduce compile time for the metaclass system.
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*/
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template <size_t I, typename T>
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struct tuple_part
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{
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T value;
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};
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template <typename...>
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struct tuple_impl;
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template <size_t... Is, typename... Ts>
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struct tuple_impl<std::index_sequence<Is...>, Ts...> : public tuple_part<Is, Ts>...
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{
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template <typename F>
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void for_each(F &&visitor) const
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{
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(static_cast<void>(visitor(static_cast<const tuple_part<Is, Ts>&>(*this).value)), ...);
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}
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};
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template <typename... Ts>
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struct tuple : public tuple_impl<std::make_index_sequence<sizeof...(Ts)>, Ts...>
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{};
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}
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//! \endcond
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#endif
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