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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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <scoped_allocator>
// template <class OtherAlloc, class ...InnerAlloc>
// class scoped_allocator_adaptor
// template <class T, class ...Args>
// void scoped_allocator_adaptor::construct(T*, Args&&...)
#include <scoped_allocator>
#include <type_traits>
#include <utility>
#include <tuple>
#include <cassert>
#include <cstdlib>
#include "uses_alloc_types.hpp"
#include "controlled_allocators.hpp"
// — If uses_allocator_v<T, inner_allocator_type> is false and
// is_constructible_v<T, Args...> is true, calls
// OUTERMOST_ALLOC_TRAITS(*this)::construct(
// OUTERMOST (*this), p, std::forward<Args>(args)...).
void test_bullet_one() {
using VoidAlloc2 = CountingAllocator<void, 2>;
AllocController POuter;
AllocController PInner;
{
using T = NotUsesAllocator<VoidAlloc2, 3>;
using Outer = CountingAllocator<T, 1>;
using Inner = CountingAllocator<T, 2>;
using SA = std::scoped_allocator_adaptor<Outer, Inner>;
static_assert(!std::uses_allocator<T, Outer>::value, "");
static_assert(!std::uses_allocator<T, Inner>::value, "");
T* ptr = (T*)::operator new(sizeof(T));
Outer O(POuter);
Inner I(PInner);
SA A(O, I);
int x = 42;
int const& cx = x;
A.construct(ptr, x, cx, std::move(x));
assert((checkConstruct<int&, int const&, int&&>(*ptr, UA_None)));
assert((POuter.checkConstruct<int&, int const&, int&&>(O, ptr)));
A.destroy(ptr);
::operator delete((void*)ptr);
}
PInner.reset();
POuter.reset();
}
// Otherwise, if uses_allocator_v<T, inner_allocator_type> is true and
// is_constructible_v<T, allocator_arg_t, inner_allocator_type&, Args...> is
// true, calls OUTERMOST_ALLOC_TRAITS(*this)::construct(OUTERMOST (*this), p,
// allocator_arg, inner_allocator(), std::forward<Args>(args)...).
void test_bullet_two() {
using VoidAlloc2 = CountingAllocator<void, 2>;
AllocController POuter;
AllocController PInner;
{
using T = UsesAllocatorV1<VoidAlloc2, 3>;
using Outer = CountingAllocator<T, 1>;
using Inner = CountingAllocator<T, 2>;
using SA = std::scoped_allocator_adaptor<Outer, Inner>;
static_assert(!std::uses_allocator<T, Outer>::value, "");
static_assert(std::uses_allocator<T, Inner>::value, "");
T* ptr = (T*)::operator new(sizeof(T));
Outer O(POuter);
Inner I(PInner);
SA A(O, I);
int x = 42;
int const& cx = x;
A.construct(ptr, x, cx, std::move(x));
assert((checkConstruct<int&, int const&, int&&>(*ptr, UA_AllocArg, I)));
assert((POuter.checkConstruct<std::allocator_arg_t const&,
SA::inner_allocator_type&, int&, int const&, int&&>(O, ptr)));
A.destroy(ptr);
::operator delete((void*)ptr);
}
PInner.reset();
POuter.reset();
}
// Otherwise, if uses_allocator_v<T, inner_allocator_type> is true and
// is_constructible_v<T, Args..., inner_allocator_type&> is true, calls
// OUTERMOST_ALLOC_TRAITS(*this)::construct(OUTERMOST (*this), p,
// std::forward<Args>(args)..., inner_allocator()).
void test_bullet_three() {
using VoidAlloc2 = CountingAllocator<void, 2>;
AllocController POuter;
AllocController PInner;
{
using T = UsesAllocatorV2<VoidAlloc2, 3>;
using Outer = CountingAllocator<T, 1>;
using Inner = CountingAllocator<T, 2>;
using SA = std::scoped_allocator_adaptor<Outer, Inner>;
static_assert(!std::uses_allocator<T, Outer>::value, "");
static_assert(std::uses_allocator<T, Inner>::value, "");
T* ptr = (T*)::operator new(sizeof(T));
Outer O(POuter);
Inner I(PInner);
SA A(O, I);
int x = 42;
int const& cx = x;
A.construct(ptr, x, cx, std::move(x));
assert((checkConstruct<int&, int const&, int&&>(*ptr, UA_AllocLast, I)));
assert((POuter.checkConstruct<
int&, int const&, int&&,
SA::inner_allocator_type&>(O, ptr)));
A.destroy(ptr);
::operator delete((void*)ptr);
}
PInner.reset();
POuter.reset();
}
int main() {
test_bullet_one();
test_bullet_two();
test_bullet_three();
}
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