tinympl  0.2
mini MPL library for C++11
set_difference.hpp
1 // Copyright (C) 2013, Ennio Barbaro.
2 //
3 // Use, modification, and distribution is subject to the Boost Software
4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // See http://sbabbi.github.io/tinympl for documentation.
8 //
9 // You are welcome to contact the author at:
10 // enniobarbaro@gmail.com
11 //
12 
13 #ifndef TINYMPL_SET_DIFFERENCE_HPP
14 #define TINYMPL_SET_DIFFERENCE_HPP
15 
16 #include <tinympl/variadic/remove_if.hpp>
17 #include <tinympl/variadic/count.hpp>
18 #include <tinympl/as_sequence.hpp>
19 #include <tinympl/sequence.hpp>
20 #include <tinympl/bind.hpp>
21 
22 namespace tinympl {
23 
37 template<class SequenceA,
38  class SequenceB,
39  template<class ...> class Out = as_sequence<SequenceA>::template rebind>
41  set_difference< as_sequence_t<SequenceA>, as_sequence_t<SequenceB>, Out> {};
42 
43 template<class ... Ts,
44  class ... Us,
45  template<class ...> class Out>
46 struct set_difference<sequence<Ts...>, sequence<Us...>, Out> :
48  bind<variadic::count, arg1, Us...>::template eval_t,
49  Out,
50  Ts...> {};
51 
52 } // namespace tinympl
53 
54 #endif // TINYMPL_SET_DIFFERENCE_HPP
Computes the difference between two sets.
Definition: set_difference.hpp:40
Remove the elements from the input sequence if they satisfy a given predicate.
Definition: remove_if.hpp:39
The main sequence type.
Definition: sequence.hpp:28