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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
// #include <memory>
// template<size_t Alignment, class T>
// bool is_sufficiently_aligned(T* ptr);
#include <cassert>
#include <cstddef>
#include <memory>
#include <type_traits>
#include "test_macros.h"
template <typename T>
void test_is_sufficiently_aligned() {
constexpr std::size_t N = alignof(T);
alignas(8 * N) std::remove_cv_t<T> buf[5];
constexpr std::size_t Sz = sizeof(T);
assert(std::is_sufficiently_aligned<N>(&buf[0]));
assert(std::is_sufficiently_aligned<2 * N>(&buf[0]));
assert(std::is_sufficiently_aligned<4 * N>(&buf[0]));
assert(std::is_sufficiently_aligned<8 * N>(&buf[0]));
assert(std::is_sufficiently_aligned<N>(&buf[1]));
assert(std::is_sufficiently_aligned<2 * N>(&buf[1]) == (((1 * Sz) % (2 * N)) == 0));
assert(std::is_sufficiently_aligned<4 * N>(&buf[1]) == (((1 * Sz) % (4 * N)) == 0));
assert(std::is_sufficiently_aligned<8 * N>(&buf[1]) == (((1 * Sz) % (8 * N)) == 0));
assert(std::is_sufficiently_aligned<N>(&buf[2]));
assert(std::is_sufficiently_aligned<2 * N>(&buf[2]) == (((2 * Sz) % (2 * N)) == 0));
assert(std::is_sufficiently_aligned<4 * N>(&buf[2]) == (((2 * Sz) % (4 * N)) == 0));
assert(std::is_sufficiently_aligned<8 * N>(&buf[2]) == (((2 * Sz) % (8 * N)) == 0));
assert(std::is_sufficiently_aligned<N>(&buf[3]));
assert(std::is_sufficiently_aligned<2 * N>(&buf[3]) == (((3 * Sz) % (2 * N)) == 0));
assert(std::is_sufficiently_aligned<4 * N>(&buf[3]) == (((3 * Sz) % (4 * N)) == 0));
assert(std::is_sufficiently_aligned<8 * N>(&buf[3]) == (((3 * Sz) % (8 * N)) == 0));
assert(std::is_sufficiently_aligned<N>(&buf[4]));
assert(std::is_sufficiently_aligned<2 * N>(&buf[4]) == (((4 * Sz) % (2 * N)) == 0));
assert(std::is_sufficiently_aligned<4 * N>(&buf[4]) == (((4 * Sz) % (4 * N)) == 0));
assert(std::is_sufficiently_aligned<8 * N>(&buf[4]) == (((4 * Sz) % (8 * N)) == 0));
}
template <typename T>
void check(T* p) {
ASSERT_SAME_TYPE(bool, decltype(std::is_sufficiently_aligned<alignof(T)>(p)));
test_is_sufficiently_aligned<T>();
test_is_sufficiently_aligned<const T>();
}
struct S {};
struct alignas(4) S4 {};
struct alignas(8) S8 {};
struct alignas(16) S16 {};
struct alignas(32) S32 {};
struct alignas(64) S64 {};
struct alignas(128) S128 {};
struct alignas(1) X {
unsigned char d[2];
};
static_assert(sizeof(X) == 2 * alignof(X));
bool tests() {
char c;
int i;
long l;
double d;
long double ld;
check(&c);
check(&i);
check(&l);
check(&d);
check(&ld);
S s;
S4 s4;
S8 s8;
S16 s16;
S32 s32;
S64 s64;
S128 s128;
check(&s);
check(&s4);
check(&s8);
check(&s16);
check(&s32);
check(&s64);
check(&s128);
X x;
check(&x);
return true;
}
int main(int, char**) {
tests();
return 0;
}
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