1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10 
11 // <string_view>
12 //   ... manipulating sequences of any non-array trivial standard-layout types.
13 
14 #include <string>
15 #include "../basic.string/test_traits.h"
16 
17 struct NotTrivial {
18     NotTrivial() : value(3) {}
19     int value;
20 };
21 
22 struct NotStandardLayout {
23 public:
24     NotStandardLayout() : one(1), two(2) {}
25     int sum() const { return one + two; } // silences "unused field 'two' warning"
26     int one;
27 private:
28     int two;
29 };
30 
31 int main(int, char**)
32 {
33     {
34 //  array
35     typedef char C[3];
36     static_assert(std::is_array<C>::value, "");
37     std::basic_string_view<C, test_traits<C> > sv;
38 //  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must not be an array}}
39     }
40 
41     {
42 //  not trivial
43     static_assert(!std::is_trivial<NotTrivial>::value, "");
44     std::basic_string_view<NotTrivial, test_traits<NotTrivial> > sv;
45 //  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must be trivial}}
46     }
47 
48     {
49 //  not standard layout
50     static_assert(!std::is_standard_layout<NotStandardLayout>::value, "");
51     std::basic_string_view<NotStandardLayout, test_traits<NotStandardLayout> > sv;
52 //  expected-error-re@string_view:* {{{{(static_assert|static assertion)}} failed{{.*}}Character type of basic_string_view must be standard-layout}}
53     }
54 
55   return 0;
56 }
57