mirror of
https://github.com/matrix-construct/construct
synced 2024-08-25 02:52:09 +02:00
229 lines
4.3 KiB
C++
229 lines
4.3 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_SET_H
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namespace ircd {
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namespace json {
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template<class dst,
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class src>
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typename std::enable_if
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<
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std::is_base_of<json::string, dst>() &&
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std::is_convertible<src, ircd::string_view>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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d = unquote(string_view{std::forward<src>(s)});
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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!std::is_base_of<json::string, dst>() &&
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std::is_convertible<src, dst>() &&
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!ircd::json::is_tuple<dst>() &&
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!std::is_same<bool, dst>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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d = std::forward<src>(s);
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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!std::is_base_of<json::string, dst>() &&
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std::is_convertible<src, dst>() &&
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!ircd::json::is_tuple<dst>() &&
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std::is_same<bool, dst>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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static const is_zero test{};
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d = !test(std::forward<src>(s));
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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std::is_arithmetic<dst>() &&
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std::is_base_of<std::string_view, typename std::remove_reference<src>::type>() &&
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!std::is_base_of<ircd::byte_view<ircd::string_view>, typename std::remove_reference<src>::type>(),
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void>::type
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_assign(dst &d,
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src&& s)
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try
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{
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d = lex_cast<dst>(std::forward<src>(s));
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}
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catch(const bad_lex_cast &e)
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{
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throw parse_error
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{
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"cannot convert '%s' to '%s'",
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demangle<src>(),
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demangle<dst>()
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};
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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std::is_arithmetic<dst>() &&
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std::is_base_of<ircd::byte_view<ircd::string_view>, typename std::remove_reference<src>::type>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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assert(!s.empty());
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d = byte_view<dst>(std::forward<src>(s));
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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std::is_base_of<std::string_view, dst>() &&
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std::is_pod<typename std::remove_reference<src>::type>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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d = byte_view<string_view>(std::forward<src>(s));
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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ircd::json::is_tuple<dst>() &&
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std::is_assignable<dst, src>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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d = std::forward<src>(s);
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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ircd::json::is_tuple<dst>() &&
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!std::is_assignable<dst, src>() &&
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std::is_constructible<dst, src>(),
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void>::type
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_assign(dst &d,
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src&& s)
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{
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d = dst{std::forward<src>(s)};
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}
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template<class dst,
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class src>
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typename std::enable_if
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<
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ircd::json::is_tuple<dst>() &&
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!std::is_assignable<dst, src>() &&
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!std::is_constructible<dst, src>(),
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void>::type
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#ifdef __clang__
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//__attribute__((unavailable("Unhandled assignment to json::tuple property")))
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#else
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__attribute__((error("Unhandled assignment to json::tuple property")))
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#endif
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_assign(dst &d,
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src&& s)
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{
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}
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template<class V,
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class... T>
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tuple<T...> &
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set(tuple<T...> &t,
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const string_view &key,
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V&& val)
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try
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{
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at(t, key, [&key, &val]
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(auto &target)
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{
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_assign(target, std::forward<V>(val));
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});
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return t;
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}
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catch(const std::exception &e)
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{
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throw parse_error
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{
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"failed to set member '%s' (from %s): %s",
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key,
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demangle<V>(),
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e.what()
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};
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}
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template<class... T>
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tuple<T...> &
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set(tuple<T...> &t,
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const string_view &key,
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const json::value &value)
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{
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switch(type(value))
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{
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case type::STRING:
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case type::LITERAL:
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{
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set(t, key, string_view{value});
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break;
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}
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case type::NUMBER:
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{
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if(value.floats)
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set(t, key, value.floating);
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else
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set(t, key, value.integer);
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break;
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}
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case type::OBJECT:
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case type::ARRAY:
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{
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if(unlikely(!value.serial))
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throw print_error
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{
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"Type %s must be JSON to be used by tuple member '%s'",
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reflect(type(value)),
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key
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};
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set(t, key, string_view{value});
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break;
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}
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}
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return t;
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}
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} // namespace json
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} // namespace ircd
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