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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <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()
{
{
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
}
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