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, c++17 10 // UNSUPPORTED: libcpp-no-concepts 11 // UNSUPPORTED: gcc-10 12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges 13 14 // constexpr T* data() noexcept; 15 // constexpr const T* data() const noexcept; 16 17 #include <ranges> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 struct Empty {}; 23 struct BigType { char buffer[64] = {10}; }; 24 25 constexpr bool test() { 26 { 27 auto sv = std::ranges::single_view<int>(42); 28 assert(*sv.data() == 42); 29 30 ASSERT_SAME_TYPE(decltype(sv.data()), int*); 31 static_assert(noexcept(sv.data())); 32 } 33 { 34 const auto sv = std::ranges::single_view<int>(42); 35 assert(*sv.data() == 42); 36 37 ASSERT_SAME_TYPE(decltype(sv.data()), const int*); 38 static_assert(noexcept(sv.data())); 39 } 40 41 { 42 auto sv = std::ranges::single_view<Empty>(Empty()); 43 assert(sv.data() != nullptr); 44 45 ASSERT_SAME_TYPE(decltype(sv.data()), Empty*); 46 } 47 { 48 const auto sv = std::ranges::single_view<Empty>(Empty()); 49 assert(sv.data() != nullptr); 50 51 ASSERT_SAME_TYPE(decltype(sv.data()), const Empty*); 52 } 53 54 { 55 auto sv = std::ranges::single_view<BigType>(BigType()); 56 assert(sv.data()->buffer[0] == 10); 57 58 ASSERT_SAME_TYPE(decltype(sv.data()), BigType*); 59 } 60 { 61 const auto sv = std::ranges::single_view<BigType>(BigType()); 62 assert(sv.data()->buffer[0] == 10); 63 64 ASSERT_SAME_TYPE(decltype(sv.data()), const BigType*); 65 } 66 67 return true; 68 } 69 70 int main(int, char**) { 71 test(); 72 static_assert(test()); 73 74 return 0; 75 } 76