1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <array>
11 
12 // T *data();
13 
14 #include <array>
15 #include <cassert>
16 
17 // std::array is explicitly allowed to be initialized with A a = { init-list };.
18 // Disable the missing braces warning for this reason.
19 #include "disable_missing_braces_warning.h"
20 
21 int main()
22 {
23     {
24         typedef double T;
25         typedef std::array<T, 3> C;
26         C c = {1, 2, 3.5};
27         T* p = c.data();
28         assert(p[0] == 1);
29         assert(p[1] == 2);
30         assert(p[2] == 3.5);
31     }
32     {
33         typedef double T;
34         typedef std::array<T, 0> C;
35         C c = {};
36         T* p = c.data();
37         (void)p; // to placate scan-build
38     }
39     {
40       typedef double T;
41       typedef std::array<const T, 0> C;
42       C c = {};
43       const T* p = c.data();
44       static_assert((std::is_same<decltype(c.data()), const T*>::value), "");
45       (void)p; // to placate scan-build
46     }
47     {
48       struct NoDefault {
49         NoDefault(int) {}
50       };
51       typedef NoDefault T;
52       typedef std::array<T, 0> C;
53       C c = {};
54       T* p = c.data();
55       assert(p != nullptr);
56     }
57 }
58