mirror of
https://github.com/matrix-construct/construct
synced 2024-11-16 23:10:54 +01:00
134 lines
3 KiB
C++
134 lines
3 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_FOR_EACH_H
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namespace ircd {
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namespace json {
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template<size_t i,
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class tuple,
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class function>
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constexpr typename std::enable_if<i == size<tuple>(), void>::type
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for_each(const tuple &t,
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function&& f)
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noexcept
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{}
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template<size_t i,
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class tuple,
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class function>
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constexpr typename std::enable_if<i == size<tuple>(), void>::type
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for_each(tuple &t,
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function&& f)
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noexcept
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{}
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template<size_t i = 0,
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class tuple,
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class function>
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inline typename std::enable_if<i < size<tuple>(), void>::type
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for_each(const tuple &t,
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function&& f)
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{
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f(key<i>(t), val<i>(t));
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for_each<i + 1>(t, std::forward<function>(f));
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}
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template<size_t i = 0,
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class tuple,
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class function>
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inline typename std::enable_if<i < size<tuple>(), void>::type
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for_each(tuple &t,
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function&& f)
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{
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f(key<i>(t), val<i>(t));
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for_each<i + 1>(t, std::forward<function>(f));
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}
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template<class tuple,
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class function>
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inline void
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for_each(const tuple &t,
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const vector_view<const string_view> &mask,
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function&& f)
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{
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std::for_each(std::begin(mask), std::end(mask), [&t, &f]
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(const auto &key)
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{
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at(t, key, [&f, &key]
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(auto&& val)
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{
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f(key, val);
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});
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});
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}
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template<class tuple,
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class function>
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inline void
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for_each(tuple &t,
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const vector_view<const string_view> &mask,
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function&& f)
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{
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std::for_each(std::begin(mask), std::end(mask), [&t, &f]
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(const auto &key)
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{
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at(t, key, [&f, &key]
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(auto&& val)
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{
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f(key, val);
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});
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});
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}
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template<class tuple,
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class function,
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ssize_t i>
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constexpr typename std::enable_if<(i < 0), void>::type
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rfor_each(const tuple &t,
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function&& f)
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noexcept
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{}
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template<class tuple,
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class function,
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ssize_t i>
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constexpr typename std::enable_if<(i < 0), void>::type
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rfor_each(tuple &t,
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function&& f)
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noexcept
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{}
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template<class tuple,
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class function,
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ssize_t i = size<tuple>() - 1>
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inline typename std::enable_if<i < tuple_size<tuple>(), void>::type
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rfor_each(const tuple &t,
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function&& f)
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{
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f(key<i>(t), val<i>(t));
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rfor_each<tuple, function, i - 1>(t, std::forward<function>(f));
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}
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template<class tuple,
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class function,
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ssize_t i = size<tuple>() - 1>
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inline typename std::enable_if<i < tuple_size<tuple>(), void>::type
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rfor_each(tuple &t,
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function&& f)
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{
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f(key<i>(t), val<i>(t));
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rfor_each<tuple, function, i - 1>(t, std::forward<function>(f));
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}
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} // namespace json
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} // namespace ircd
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