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//===----------------------------------------------------------------------===//
//
// 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>
// T *data();
#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()
{
{
typedef double T;
typedef std::array<T, 3> C;
C c = {1, 2, 3.5};
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;
C c = {};
T* p = c.data();
LIBCPP_ASSERT(p != nullptr);
}
{
typedef double T;
typedef std::array<const T, 0> C;
C c = {{}};
const T* p = c.data();
static_assert((std::is_same<decltype(c.data()), const T*>::value), "");
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);
}
{
typedef NoDefault T;
typedef std::array<T, 0> C;
C c = {};
T* p = c.data();
LIBCPP_ASSERT(p != nullptr);
}
}
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