Blame view

3rdparty/boost_1_81_0/libs/hana/example/partition.cpp 1.4 KB
73ef4ff3   Hu Chunming   提交三方库
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
  // Copyright Louis Dionne 2013-2022
  // Distributed under the Boost Software License, Version 1.0.
  // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
  
  #include <boost/hana/assert.hpp>
  #include <boost/hana/equal.hpp>
  #include <boost/hana/ext/std/integral_constant.hpp>
  #include <boost/hana/integral_constant.hpp>
  #include <boost/hana/mod.hpp>
  #include <boost/hana/not_equal.hpp>
  #include <boost/hana/pair.hpp>
  #include <boost/hana/partition.hpp>
  #include <boost/hana/tuple.hpp>
  #include <boost/hana/type.hpp>
  
  #include <type_traits>
  namespace hana = boost::hana;
  
  
  BOOST_HANA_CONSTANT_CHECK(
      hana::partition(hana::tuple_c<int, 1, 2, 3, 4, 5, 6, 7>, [](auto x) {
          return x % hana::int_c<2> != hana::int_c<0>;
      })
      ==
      hana::make_pair(
          hana::tuple_c<int, 1, 3, 5, 7>,
          hana::tuple_c<int, 2, 4, 6>
      )
  );
  
  BOOST_HANA_CONSTANT_CHECK(
      hana::partition(hana::tuple_t<void, int, float, char, double>, hana::trait<std::is_floating_point>)
      ==
      hana::make_pair(
          hana::tuple_t<float, double>,
          hana::tuple_t<void, int, char>
      )
  );
  
  
  // partition.by is syntactic sugar
  BOOST_HANA_CONSTANT_CHECK(
      hana::partition.by(hana::trait<std::is_floating_point>,
                         hana::tuple_t<void, int, float, char, double>)
      ==
      hana::make_pair(
          hana::tuple_t<float, double>,
          hana::tuple_t<void, int, char>
      )
  );
  
  int main() { }