data.pass.cpp revision a90c6dd46005b2b14de3bb889a8d03bb34bd3256 
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// <iterator>
11// template <class C> constexpr auto data(C& c) -> decltype(c.data());               // C++17
12// template <class C> constexpr auto data(const C& c) -> decltype(c.data());         // C++17
13// template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept;           // C++17
14// template <class E> constexpr const E* data(initializer_list<E> il) noexcept;      // C++17
15
16#if __cplusplus <= 201402L
17int main () {}
18#else
19
20
21#include <__config>
22
23#include <iterator>
24#include <cassert>
25#include <vector>
26#include <array>
27#include <initializer_list>
28
29template<typename C>
30void test_const_container( const C& c )
31{
32    assert ( std::data(c)   == c.data());
33}
34
35template<typename T>
36void test_const_container( const std::initializer_list<T>& c )
37{
38    assert ( std::data(c)   == c.begin());
39}
40
41template<typename C>
42void test_container( C& c )
43{
44    assert ( std::data(c)   == c.data());
45}
46
47template<typename T>
48void test_container( std::initializer_list<T>& c)
49{
50    assert ( std::data(c)   == c.begin());
51}
52
53template<typename T, size_t Sz>
54void test_const_array( const T (&array)[Sz] )
55{
56    assert ( std::data(array) == &array[0]);
57}
58
59int main()
60{
61    std::vector<int> v; v.push_back(1);
62    std::array<int, 1> a; a[0] = 3;
63    std::initializer_list<int> il = { 4 };
64
65    test_container ( v );
66    test_container ( a );
67    test_container ( il );
68
69    test_const_container ( v );
70    test_const_container ( a );
71    test_const_container ( il );
72
73    static constexpr int arrA [] { 1, 2, 3 };
74    test_const_array ( arrA );
75}
76
77#endif
78