//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <memory>
// template <class Alloc>
// struct allocator_traits
// {
// static constexpr pointer allocate(allocator_type& a, size_type n, const_void_pointer hint);
// ...
// };
#include <memory>
#include <cstdint>
#include <cassert>
#include "test_macros.h"
#include "incomplete_type_helper.h"
template <class T>
struct A
{
typedef T value_type;
TEST_CONSTEXPR_CXX20 A() {}
TEST_CONSTEXPR_CXX20 value_type* allocate(std::size_t n)
{
assert(n == 10);
return &storage;
}
value_type storage;
};
template <class T>
struct B
{
typedef T value_type;
TEST_CONSTEXPR_CXX20 value_type* allocate(std::size_t n, const void* p)
{
assert(n == 11);
assert(p == nullptr);
return &storage;
}
value_type storage;
};
TEST_CONSTEXPR_CXX20 bool test()
{
#if TEST_STD_VER >= 11
{
A<int> a;
assert(std::allocator_traits<A<int> >::allocate(a, 10, nullptr) == &a.storage);
}
{
typedef A<IncompleteHolder*> Alloc;
Alloc a;
assert(std::allocator_traits<Alloc>::allocate(a, 10, nullptr) == &a.storage);
}
#endif
{
B<int> b;
assert(std::allocator_traits<B<int> >::allocate(b, 11, nullptr) == &b.storage);
}
{
typedef B<IncompleteHolder*> Alloc;
Alloc b;
assert(std::allocator_traits<Alloc>::allocate(b, 11, nullptr) == &b.storage);
}
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}