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indices.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
18 // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 
22 #ifndef GEARS_META_INDICES_HPP
23 #define GEARS_META_INDICES_HPP
24 
25 #include <cstddef>
26 
27 namespace gears {
28 namespace meta {
37 template<size_t... Ns>
38 struct indices {};
39 
85 template<size_t N, size_t... Ns>
86 struct build_indices : build_indices<N-1, N-1, Ns...> {};
87 
88 template<size_t... Ns>
89 struct build_indices<0, Ns...> : indices<Ns...> {};
90 } // meta
91 } // gears
92 
93 #endif // GEARS_META_INDICES_HPP