mirror of
https://github.com/matrix-construct/construct
synced 2024-12-28 08:24:08 +01:00
76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_JSON_TUPLE__MEMBER_TRANSFORM_H
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namespace ircd {
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namespace json {
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template<class it_a,
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class it_b,
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class closure,
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class... T>
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inline auto
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_member_transform_if(const tuple<T...> &tuple,
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it_a it,
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const it_b end,
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closure&& lambda)
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{
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for_each(tuple, [&it, &end, &lambda]
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(const auto &key, auto&& val)
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{
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if(it == end)
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return false;
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if(likely(lambda(*it, key, val)))
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++it;
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return true;
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});
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return it;
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}
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template<class it_a,
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class it_b,
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class closure,
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class... T>
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inline auto
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_member_transform(const tuple<T...> &tuple,
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it_a it,
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const it_b end,
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closure&& lambda)
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{
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return _member_transform_if(tuple, it, end, [&lambda]
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(auto&& ret, const auto &key, auto&& val)
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{
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ret = lambda(key, val);
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return true;
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});
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}
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template<class it_a,
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class it_b,
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class... T>
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inline auto
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_member_transform(const tuple<T...> &tuple,
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it_a it,
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const it_b end)
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{
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return _member_transform(tuple, it, end, []
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(auto&& ret, const auto &key, auto&& val) -> member
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{
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return { key, val };
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});
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}
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} // namespace json
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} // namespace ircd
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