| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <array> |
| |
| // const T* data() const; |
| |
| #include <array> |
| #include <cassert> |
| #include <cstddef> // for std::max_align_t |
| |
| #include "test_macros.h" |
| |
| // std::array is explicitly allowed to be initialized with A a = { init-list };. |
| // Disable the missing braces warning for this reason. |
| #include "disable_missing_braces_warning.h" |
| |
| struct NoDefault { |
| NoDefault(int) {} |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| typedef double T; |
| typedef std::array<T, 3> C; |
| const C c = {1, 2, 3.5}; |
| const T* p = c.data(); |
| assert(p[0] == 1); |
| assert(p[1] == 2); |
| assert(p[2] == 3.5); |
| } |
| { |
| typedef double T; |
| typedef std::array<T, 0> C; |
| const C c = {}; |
| const T* p = c.data(); |
| (void)p; // to placate scan-build |
| } |
| { |
| typedef NoDefault T; |
| typedef std::array<T, 0> C; |
| const C c = {}; |
| const T* p = c.data(); |
| LIBCPP_ASSERT(p != nullptr); |
| } |
| { |
| typedef std::max_align_t T; |
| typedef std::array<T, 0> C; |
| const C c = {}; |
| const T* p = c.data(); |
| LIBCPP_ASSERT(p != nullptr); |
| std::uintptr_t pint = reinterpret_cast<std::uintptr_t>(p); |
| assert(pint % TEST_ALIGNOF(std::max_align_t) == 0); |
| } |
| #if TEST_STD_VER > 14 |
| { |
| typedef std::array<int, 5> C; |
| constexpr C c1{0,1,2,3,4}; |
| constexpr const C c2{0,1,2,3,4}; |
| |
| static_assert ( c1.data() == &c1[0], ""); |
| static_assert ( *c1.data() == c1[0], ""); |
| static_assert ( c2.data() == &c2[0], ""); |
| static_assert ( *c2.data() == c2[0], ""); |
| } |
| #endif |
| |
| return 0; |
| } |