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 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 12 // <iterator> 13 // template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 14 // template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 15 // template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 16 // template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 17 18 #include <iterator> 19 #include <cassert> 20 #include <vector> 21 #include <array> 22 #include <initializer_list> 23 24 #include "test_macros.h" 25 26 #if TEST_STD_VER > 14 27 #include <string_view> 28 #endif 29 30 template<typename C> 31 void test_const_container( const C& c ) 32 { 33 // Can't say noexcept here because the container might not be 34 assert ( std::data(c) == c.data()); 35 } 36 37 template<typename T> 38 void test_const_container( const std::initializer_list<T>& c ) 39 { 40 ASSERT_NOEXCEPT(std::data(c)); 41 assert ( std::data(c) == c.begin()); 42 } 43 44 template<typename C> 45 void test_container( C& c ) 46 { 47 // Can't say noexcept here because the container might not be 48 assert ( std::data(c) == c.data()); 49 } 50 51 template<typename T> 52 void test_container( std::initializer_list<T>& c) 53 { 54 ASSERT_NOEXCEPT(std::data(c)); 55 assert ( std::data(c) == c.begin()); 56 } 57 58 template<typename T, size_t Sz> 59 void test_const_array( const T (&array)[Sz] ) 60 { 61 ASSERT_NOEXCEPT(std::data(array)); 62 assert ( std::data(array) == &array[0]); 63 } 64 65 int main() 66 { 67 std::vector<int> v; v.push_back(1); 68 std::array<int, 1> a; a[0] = 3; 69 std::initializer_list<int> il = { 4 }; 70 71 test_container ( v ); 72 test_container ( a ); 73 test_container ( il ); 74 75 test_const_container ( v ); 76 test_const_container ( a ); 77 test_const_container ( il ); 78 79 #if TEST_STD_VER > 14 80 std::string_view sv{"ABC"}; 81 test_container ( sv ); 82 test_const_container ( sv ); 83 #endif 84 85 static constexpr int arrA [] { 1, 2, 3 }; 86 test_const_array ( arrA ); 87 } 88
