mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 07:50:57 +01:00
101 lines
2.2 KiB
C++
101 lines
2.2 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_INDEXOF_H
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namespace ircd {
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namespace json {
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template<class tuple,
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size_t hash,
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size_t i>
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constexpr typename std::enable_if<i == size<tuple>(), size_t>::type
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indexof()
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{
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return size<tuple>();
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}
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template<class tuple,
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size_t hash,
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size_t i = 0>
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constexpr typename std::enable_if<i < size<tuple>(), size_t>::type
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indexof()
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{
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constexpr auto equal
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{
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name_hash(key<tuple, i>()) == hash
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};
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return equal? i : indexof<tuple, hash, i + 1>();
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}
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template<class tuple,
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const char *const &name,
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size_t i>
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constexpr typename std::enable_if<i == size<tuple>(), size_t>::type
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indexof()
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{
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return size<tuple>();
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}
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template<class tuple,
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const char *const &name,
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size_t i = 0>
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constexpr typename std::enable_if<i < size<tuple>(), size_t>::type
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indexof()
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{
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return indexof<tuple, name_hash(name)>();
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}
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template<class tuple,
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size_t i>
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constexpr typename std::enable_if<i == size<tuple>(), size_t>::type
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indexof(const char *const &name)
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{
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return size<tuple>();
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}
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template<class tuple,
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size_t i = 0>
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constexpr typename std::enable_if<i < size<tuple>(), size_t>::type
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indexof(const char *const &name)
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{
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constexpr auto equal
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{
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_constexpr_equal(key<tuple, i>(), name)
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};
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return equal? i : indexof<tuple, i + 1>(name);
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}
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template<class tuple,
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size_t i>
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constexpr typename std::enable_if<i == size<tuple>(), size_t>::type
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indexof(const string_view &name)
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{
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return size<tuple>();
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}
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template<class tuple,
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size_t i = 0>
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constexpr typename std::enable_if<i < size<tuple>(), size_t>::type
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indexof(const string_view &name)
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{
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const auto equal
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{
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name == key<tuple, i>()
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};
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return equal? i : indexof<tuple, i + 1>(name);
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}
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} // namespace json
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} // namespace ircd
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