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