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