1 // Copyright Louis Dionne 2013-2017
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
__anondc0782960102(auto x) 20 auto is_odd = [](auto x) {
21 return x % 2_c != 0_c;
22 };
23
main()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 }
33