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get.hpp
1 // The MIT License (MIT)
2 
3 // Copyright (c) 2012-2014 Danny Y., Rapptz
4 
5 // Permission is hereby granted, free of charge, to any person obtaining a copy of
6 // this software and associated documentation files (the "Software"), to deal in
7 // the Software without restriction, including without limitation the rights to
8 // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 // the Software, and to permit persons to whom the Software is furnished to do so,
10 // subject to the following conditions:
11 
12 // The above copyright notice and this permission notice shall be included in all
13 // copies or substantial portions of the Software.
14 
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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21 
22 #ifndef GEARS_ADL_GET_HPP
23 #define GEARS_ADL_GET_HPP
24 
25 #include <tuple>
26 #include <utility>
27 #include <cstddef>
28 
29 namespace gears {
30 namespace adl {
31 namespace detail {
32 using std::get;
33 
34 template<size_t N, typename T>
35 constexpr auto adl_get(T&& t) -> decltype(get<N>(std::declval<T>())) {
36  return get<N>(std::forward<T>(t));
37 }
38 } // detail
39 
55 template<size_t N, typename T>
56 constexpr auto get(T&& t) -> decltype(detail::adl_get<N>(std::declval<T>())) {
57  return detail::adl_get<N>(std::forward<T>(t));
58 }
59 } // adl
60 } // gears
61 
62 #endif // GEARS_ADL_GET_HPP