1// Copyright Louis Dionne 2013-2022
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/greater.hpp>
7#include <boost/hana/greater_equal.hpp>
8#include <boost/hana/integral_constant.hpp>
9#include <boost/hana/less.hpp>
10#include <boost/hana/less_equal.hpp>
11#include <boost/hana/not.hpp>
12#include <boost/hana/string.hpp>
13namespace hana = boost::hana;
14
15
16int main() {
17 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
18 BOOST_HANA_STRING(""),
19 BOOST_HANA_STRING("")
20 )));
21
22 BOOST_HANA_CONSTANT_CHECK(hana::less(
23 BOOST_HANA_STRING(""),
24 BOOST_HANA_STRING("a")
25 ));
26
27 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
28 BOOST_HANA_STRING("a"),
29 BOOST_HANA_STRING("")
30 )));
31
32 BOOST_HANA_CONSTANT_CHECK(hana::less(
33 BOOST_HANA_STRING("a"),
34 BOOST_HANA_STRING("ab")
35 ));
36
37 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::less(
38 BOOST_HANA_STRING("ab"),
39 BOOST_HANA_STRING("ab")
40 )));
41
42 BOOST_HANA_CONSTANT_CHECK(hana::less(
43 BOOST_HANA_STRING("abc"),
44 BOOST_HANA_STRING("abcde")
45 ));
46
47 BOOST_HANA_CONSTANT_CHECK(hana::less(
48 BOOST_HANA_STRING("abcde"),
49 BOOST_HANA_STRING("abfde")
50 ));
51
52 // check operators
53 BOOST_HANA_CONSTANT_CHECK(
54 BOOST_HANA_STRING("abc") < BOOST_HANA_STRING("abcd")
55 );
56 BOOST_HANA_CONSTANT_CHECK(
57 BOOST_HANA_STRING("abc") <= BOOST_HANA_STRING("abcd")
58 );
59 BOOST_HANA_CONSTANT_CHECK(
60 BOOST_HANA_STRING("abcd") > BOOST_HANA_STRING("abc")
61 );
62 BOOST_HANA_CONSTANT_CHECK(
63 BOOST_HANA_STRING("abcd") >= BOOST_HANA_STRING("abc")
64 );
65}
66

source code of boost/libs/hana/test/string/less.cpp