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/detail/preprocessor.hpp>
7
8#include <string>
9#include <vector>
10
11
12//////////////////////////////////////////////////////////////////////////////
13// BOOST_HANA_PP_CONCAT
14//////////////////////////////////////////////////////////////////////////////
15static_assert(BOOST_HANA_PP_CONCAT(1, 2) == 12, "");
16
17//////////////////////////////////////////////////////////////////////////////
18// BOOST_HANA_PP_FRONT
19//////////////////////////////////////////////////////////////////////////////
20static_assert(BOOST_HANA_PP_FRONT(0) == 0, "");
21static_assert(BOOST_HANA_PP_FRONT(0, 1) == 0, "");
22static_assert(BOOST_HANA_PP_FRONT(0, 1, 2) == 0, "");
23static_assert(BOOST_HANA_PP_FRONT(0, 1, 2, 3) == 0, "");
24
25static_assert(BOOST_HANA_PP_FRONT(0, 1, 2, 3, 4, 5, 6, 6, 8, 9,
26 10, 11, 12, 13, 14, 15, 16, 16, 18) == 0, "");
27
28static_assert(BOOST_HANA_PP_FRONT(0, 1, 2, 3, 4, 5, 6, 6, 8, 9,
29 10, 11, 12, 13, 14, 15, 16, 16, 18, 19) == 0, "");
30
31
32int main() {
33 using Vector = std::vector<int>;
34
35 //////////////////////////////////////////////////////////////////////////
36 // BOOST_HANA_PP_STRINGIZE
37 //////////////////////////////////////////////////////////////////////////
38 {
39 constexpr char const* xyz = BOOST_HANA_PP_STRINGIZE(xyz);
40 BOOST_HANA_RUNTIME_CHECK(std::string{xyz} == "xyz");
41 }{
42 constexpr char const* xyz = BOOST_HANA_PP_STRINGIZE(foo{bar, baz});
43 BOOST_HANA_RUNTIME_CHECK(std::string{xyz} == "foo{bar, baz}");
44 }{
45 constexpr char const* xyz = BOOST_HANA_PP_STRINGIZE(foo, bar, baz);
46 BOOST_HANA_RUNTIME_CHECK(std::string{xyz} == "foo, bar, baz");
47 }
48
49 //////////////////////////////////////////////////////////////////////////
50 // BOOST_HANA_PP_DROP_FRONT
51 //////////////////////////////////////////////////////////////////////////
52 {
53 Vector args = {BOOST_HANA_PP_DROP_FRONT(0, 1)};
54 BOOST_HANA_RUNTIME_CHECK(args == Vector{1});
55 }{
56 Vector args = {BOOST_HANA_PP_DROP_FRONT(0, 1, 2)};
57 BOOST_HANA_RUNTIME_CHECK(args == Vector{1, 2});
58 }{
59 Vector args = {BOOST_HANA_PP_DROP_FRONT(0, 1, 2, 3)};
60 BOOST_HANA_RUNTIME_CHECK(args == Vector{1, 2, 3});
61 }{
62 Vector args = {BOOST_HANA_PP_DROP_FRONT(0, 1, 2, 3, 4)};
63 BOOST_HANA_RUNTIME_CHECK(args == Vector{1, 2, 3, 4});
64 }
65}
66

source code of boost/libs/hana/test/detail/preprocessor.cpp