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: c++03, c++11, c++14
10
11 // <iterator>
12 // template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17
13 // template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17
14 // template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17
15 // template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17
16
17 #include <iterator>
18 #include <cassert>
19 #include <vector>
20 #include <array>
21 #include <initializer_list>
22
23 #include "test_macros.h"
24
25 #if TEST_STD_VER > 14
26 #include <string_view>
27 #endif
28
29 template<typename C>
test_const_container(const C & c)30 void test_const_container( const C& c )
31 {
32 // Can't say noexcept here because the container might not be
33 assert ( std::data(c) == c.data());
34 }
35
36 template<typename T>
test_const_container(const std::initializer_list<T> & c)37 void test_const_container( const std::initializer_list<T>& c )
38 {
39 ASSERT_NOEXCEPT(std::data(c));
40 assert ( std::data(c) == c.begin());
41 }
42
43 template<typename C>
test_container(C & c)44 void test_container( C& c )
45 {
46 // Can't say noexcept here because the container might not be
47 assert ( std::data(c) == c.data());
48 }
49
50 template<typename T>
test_container(std::initializer_list<T> & c)51 void test_container( std::initializer_list<T>& c)
52 {
53 ASSERT_NOEXCEPT(std::data(c));
54 assert ( std::data(c) == c.begin());
55 }
56
57 template<typename T, size_t Sz>
test_const_array(const T (& array)[Sz])58 void test_const_array( const T (&array)[Sz] )
59 {
60 ASSERT_NOEXCEPT(std::data(array));
61 assert ( std::data(array) == &array[0]);
62 }
63
main(int,char **)64 int main(int, char**)
65 {
66 std::vector<int> v; v.push_back(1);
67 std::array<int, 1> a; a[0] = 3;
68 std::initializer_list<int> il = { 4 };
69
70 test_container ( v );
71 test_container ( a );
72 test_container ( il );
73
74 test_const_container ( v );
75 test_const_container ( a );
76 test_const_container ( il );
77
78 #if TEST_STD_VER > 14
79 std::string_view sv{"ABC"};
80 test_container ( sv );
81 test_const_container ( sv );
82 #endif
83
84 static constexpr int arrA [] { 1, 2, 3 };
85 test_const_array ( arrA );
86
87 return 0;
88 }
89