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/equal.hpp>
7 #include <boost/hana/front.hpp>
8 #include <boost/hana/greater.hpp>
9 #include <boost/hana/integral_constant.hpp>
10 #include <boost/hana/negate.hpp>
11 #include <boost/hana/ordering.hpp>
12 #include <boost/hana/sort.hpp>
13 #include <boost/hana/tuple.hpp>
14
15 #include <string>
16 namespace hana = boost::hana;
17 using namespace hana::literals;
18 using namespace std::literals;
19
20
21 // sort without a predicate
22 BOOST_HANA_CONSTANT_CHECK(
23 hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c)) ==
24 hana::make_tuple(-2_c, 0_c, 1_c, 3_c)
25 );
26
27 // sort with a predicate
28 BOOST_HANA_CONSTANT_CHECK(
29 hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c), hana::greater) ==
30 hana::make_tuple(3_c, 1_c, 0_c, -2_c)
31 );
32
main()33 int main() {
34 // sort.by is syntactic sugar
35 auto tuples = hana::make_tuple(
36 hana::make_tuple(2_c, 'x', nullptr),
37 hana::make_tuple(1_c, "foobar"s, hana::int_c<4>)
38 );
39
40 BOOST_HANA_RUNTIME_CHECK(
41 hana::sort.by(hana::ordering(hana::front), tuples)
42 == hana::make_tuple(
43 hana::make_tuple(1_c, "foobar"s, hana::int_c<4>),
44 hana::make_tuple(2_c, 'x', nullptr)
45 )
46 );
47 }
48