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1 | // Copyright Louis Dionne 2013-2016 |
2 | // Distributed under the Boost Software License, Version 1.0. | |
3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
4 | ||
5 | #include <boost/hana/assert.hpp> | |
6 | #include <boost/hana/count_if.hpp> | |
7 | #include <boost/hana/equal.hpp> | |
8 | #include <boost/hana/ext/std/integral_constant.hpp> | |
9 | #include <boost/hana/integral_constant.hpp> | |
10 | #include <boost/hana/mod.hpp> | |
11 | #include <boost/hana/not_equal.hpp> | |
12 | #include <boost/hana/tuple.hpp> | |
13 | #include <boost/hana/type.hpp> | |
14 | ||
15 | #include <type_traits> | |
16 | namespace hana = boost::hana; | |
17 | using namespace hana::literals; | |
18 | ||
19 | ||
20 | auto is_odd = [](auto x) { | |
21 | return x % 2_c != 0_c; | |
22 | }; | |
23 | ||
24 | int main() { | |
25 | constexpr auto ints = hana::tuple_c<int, 1, 2, 3>; | |
26 | BOOST_HANA_CONSTANT_CHECK(hana::count_if(ints, is_odd) == hana::size_c<2>); | |
27 | ||
28 | constexpr auto types = hana::tuple_t<int, char, long, short, char, double>; | |
29 | BOOST_HANA_CONSTANT_CHECK(hana::count_if(types, hana::trait<std::is_floating_point>) == hana::size_c<1>); | |
30 | BOOST_HANA_CONSTANT_CHECK(hana::count_if(types, hana::equal.to(hana::type_c<char>)) == hana::size_c<2>); | |
31 | BOOST_HANA_CONSTANT_CHECK(hana::count_if(types, hana::equal.to(hana::type_c<void>)) == hana::size_c<0>); | |
32 | } |