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/core/make.hpp>
7#include <boost/hana/equal.hpp>
8#include <boost/hana/find.hpp>
9#include <boost/hana/integral_constant.hpp>
10#include <boost/hana/optional.hpp>
11#include <boost/hana/range.hpp>
12
13#include <support/cnumeric.hpp>
14namespace hana = boost::hana;
15
16
17int main() {
18 BOOST_HANA_CONSTANT_CHECK(hana::equal(
19 hana::find(hana::make_range(hana::int_c<0>, hana::int_c<0>), cnumeric<int, 0>),
20 hana::nothing
21 ));
22
23 BOOST_HANA_CONSTANT_CHECK(hana::equal(
24 hana::find(hana::make_range(hana::int_c<0>, hana::int_c<1>), cnumeric<int, 0>),
25 hana::just(hana::int_c<0>)
26 ));
27
28 BOOST_HANA_CONSTANT_CHECK(hana::equal(
29 hana::find(hana::make_range(hana::int_c<0>, hana::int_c<10>), cnumeric<int, 3>),
30 hana::just(hana::int_c<3>)
31 ));
32
33 BOOST_HANA_CONSTANT_CHECK(hana::equal(
34 hana::find(hana::make_range(hana::int_c<0>, hana::int_c<10>), cnumeric<int, 9>),
35 hana::just(hana::int_c<9>)
36 ));
37
38 BOOST_HANA_CONSTANT_CHECK(hana::equal(
39 hana::find(hana::make_range(hana::int_c<-10>, hana::int_c<10>), cnumeric<int, -10>),
40 hana::just(hana::int_c<-10>)
41 ));
42
43 BOOST_HANA_CONSTANT_CHECK(hana::equal(
44 hana::find(hana::make_range(hana::int_c<-10>, hana::int_c<10>), cnumeric<int, -5>),
45 hana::just(hana::int_c<-5>)
46 ));
47
48 BOOST_HANA_CONSTANT_CHECK(hana::equal(
49 hana::find(hana::make_range(hana::int_c<-10>, hana::int_c<0>), cnumeric<int, 3>),
50 hana::nothing
51 ));
52
53 BOOST_HANA_CONSTANT_CHECK(hana::equal(
54 hana::find(hana::make_range(hana::int_c<0>, hana::int_c<10>), cnumeric<int, 15>),
55 hana::nothing
56 ));
57}
58

source code of boost/libs/hana/test/range/find.cpp