1 // { dg-options "-std=gnu++17" }
2 // { dg-do compile { target c++17 } }
3
4 // Copyright (C) 2016-2018 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 //
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 //
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
20
21 #include <type_traits>
22 #include <testsuite_tr1.h>
23
test01()24 void test01()
25 {
26 using std::has_unique_object_representations;
27 using __gnu_test::test_category;
28
29 // Positive tests.
30 static_assert(test_category<has_unique_object_representations,
31 char>(true), "");
32 static_assert(test_category<has_unique_object_representations,
33 unsigned char>(true), "");
34 static_assert(test_category<has_unique_object_representations,
35 signed char>(true), "");
36 static_assert(test_category<has_unique_object_representations,
37 unsigned>(true), "");
38 static_assert(test_category<has_unique_object_representations,
39 bool>(true), "");
40
41 enum E : unsigned { };
42 static_assert(test_category<has_unique_object_representations,
43 E>(true), "");
44
45 static_assert(test_category<has_unique_object_representations,
46 unsigned[3]>(true), "");
47 static_assert(test_category<has_unique_object_representations,
48 unsigned[3][2]>(true), "");
49 static_assert(test_category<has_unique_object_representations,
50 unsigned[]>(true), "");
51 static_assert(test_category<has_unique_object_representations,
52 unsigned[][2]>(true), "");
53 static_assert(test_category<has_unique_object_representations,
54 E[3]>(true), "");
55 static_assert(test_category<has_unique_object_representations,
56 E[3][2]>(true), "");
57 static_assert(test_category<has_unique_object_representations,
58 E[]>(true), "");
59 static_assert(test_category<has_unique_object_representations,
60 E[][2]>(true), "");
61
62 struct Padded {
63 char c1;
64 alignas(4) char c2;
65 };
66
67 struct Bitfield {
68 int i : 3;
69 };
70
71 struct Aligned {
72 alignas(4) char c;
73 };
74
75 // Negative tests.
76 static_assert(test_category<has_unique_object_representations,
77 void>(false), "");
78 static_assert(test_category<has_unique_object_representations,
79 float>(false), ""); // implementation-defined
80 static_assert(test_category<has_unique_object_representations,
81 Padded>(false), "");
82 static_assert(test_category<has_unique_object_representations,
83 Padded[2]>(false), "");
84 static_assert(test_category<has_unique_object_representations,
85 Padded[2][1]>(false), "");
86 static_assert(test_category<has_unique_object_representations,
87 Padded[]>(false), "");
88 static_assert(test_category<has_unique_object_representations,
89 Padded[][1]>(false), "");
90 static_assert(test_category<has_unique_object_representations,
91 Bitfield>(false), "");
92 static_assert(test_category<has_unique_object_representations,
93 Bitfield[2]>(false), "");
94 static_assert(test_category<has_unique_object_representations,
95 Bitfield[2][1]>(false), "");
96 static_assert(test_category<has_unique_object_representations,
97 Bitfield[]>(false), "");
98 static_assert(test_category<has_unique_object_representations,
99 Bitfield[][1]>(false), "");
100 static_assert(test_category<has_unique_object_representations,
101 Aligned>(false), "");
102 static_assert(test_category<has_unique_object_representations,
103 Aligned[2]>(false), "");
104 static_assert(test_category<has_unique_object_representations,
105 Aligned[2][1]>(false), "");
106 static_assert(test_category<has_unique_object_representations,
107 Aligned[]>(false), "");
108 static_assert(test_category<has_unique_object_representations,
109 Aligned[][1]>(false), "");
110 }
111
112 void
test02()113 test02()
114 {
115 using std::has_unique_object_representations;
116 using std::has_unique_object_representations_v;
117
118 static_assert(has_unique_object_representations_v<int>
119 == has_unique_object_representations<int>::value);
120 static_assert(has_unique_object_representations_v<void>
121 == has_unique_object_representations<void>::value);
122 static_assert(has_unique_object_representations_v<float>
123 == has_unique_object_representations<float>::value);
124 }
125