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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.
//
//===----------------------------------------------------------------------===//
// REQUIRES: c++experimental
// UNSUPPORTED: c++98, c++03
// <experimental/memory_resource>
// template <class T> class polymorphic_allocator
// template <class U, class ...Args>
// void polymorphic_allocator<T>::construct(U *, Args &&...)
#include <experimental/memory_resource>
#include <type_traits>
#include <cassert>
#include <cstdlib>
#include "test_macros.h"
#include "test_memory_resource.hpp"
#include "uses_alloc_types.hpp"
#include "controlled_allocators.hpp"
#include "test_allocator.h"
namespace ex = std::experimental::pmr;
template <class T>
struct PMATest {
TestResource R;
ex::polymorphic_allocator<T> A;
T* ptr;
bool constructed;
PMATest() : A(&R), ptr(A.allocate(1)), constructed(false) {}
template <class ...Args>
void construct(Args&&... args) {
A.construct(ptr, std::forward<Args>(args)...);
constructed = true;
}
~PMATest() {
if (constructed) A.destroy(ptr);
A.deallocate(ptr, 1);
}
};
template <class T, class ...Args>
bool doTest(UsesAllocatorType UAExpect, Args&&... args)
{
PMATest<T> TH;
// UNDER TEST //
TH.construct(std::forward<Args>(args)...);
return checkConstruct<Args&&...>(*TH.ptr, UAExpect, &TH.R);
// ------- //
}
template <class T, class ...Args>
bool doTestUsesAllocV0(Args&&... args)
{
PMATest<T> TH;
// UNDER TEST //
TH.construct(std::forward<Args>(args)...);
return checkConstruct<Args&&...>(*TH.ptr, UA_None);
// -------- //
}
template <class T, class EAlloc, class ...Args>
bool doTestUsesAllocV1(EAlloc const& ealloc, Args&&... args)
{
PMATest<T> TH;
// UNDER TEST //
TH.construct(std::allocator_arg, ealloc, std::forward<Args>(args)...);
return checkConstruct<Args&&...>(*TH.ptr, UA_AllocArg, ealloc);
// -------- //
}
template <class T, class EAlloc, class ...Args>
bool doTestUsesAllocV2(EAlloc const& ealloc, Args&&... args)
{
PMATest<T> TH;
// UNDER TEST //
TH.construct(std::forward<Args>(args)..., ealloc);
return checkConstruct<Args&&...>(*TH.ptr, UA_AllocLast, ealloc);
// -------- //
}
template <class Alloc, class ...Args>
void test_pmr_uses_alloc(Args&&... args)
{
TestResource R(12435);
ex::memory_resource* M = &R;
{
// NotUsesAllocator provides valid signatures for each uses-allocator
// construction but does not supply the required allocator_type typedef.
// Test that we can call these constructors manually without
// polymorphic_allocator interfering.
using T = NotUsesAllocator<Alloc, sizeof...(Args)>;
assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...));
assert((doTestUsesAllocV1<T>(M, std::forward<Args>(args)...)));
assert((doTestUsesAllocV2<T>(M, std::forward<Args>(args)...)));
}
{
// Test T(std::allocator_arg_t, Alloc const&, Args...) construction
using T = UsesAllocatorV1<Alloc, sizeof...(Args)>;
assert((doTest<T>(UA_AllocArg, std::forward<Args>(args)...)));
}
{
// Test T(Args..., Alloc const&) construction
using T = UsesAllocatorV2<Alloc, sizeof...(Args)>;
assert((doTest<T>(UA_AllocLast, std::forward<Args>(args)...)));
}
{
// Test that T(std::allocator_arg_t, Alloc const&, Args...) construction
// is prefered when T(Args..., Alloc const&) is also available.
using T = UsesAllocatorV3<Alloc, sizeof...(Args)>;
assert((doTest<T>(UA_AllocArg, std::forward<Args>(args)...)));
}
}
// Test that polymorphic_allocator does not prevent us from manually
// doing non-pmr uses-allocator construction.
template <class Alloc, class AllocObj, class ...Args>
void test_non_pmr_uses_alloc(AllocObj const& A, Args&&... args)
{
{
using T = NotUsesAllocator<Alloc, sizeof...(Args)>;
assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...));
assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...)));
assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...)));
}
{
using T = UsesAllocatorV1<Alloc, sizeof...(Args)>;
assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...));
assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...)));
}
{
using T = UsesAllocatorV2<Alloc, sizeof...(Args)>;
assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...));
assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...)));
}
{
using T = UsesAllocatorV3<Alloc, sizeof...(Args)>;
assert(doTestUsesAllocV0<T>(std::forward<Args>(args)...));
assert((doTestUsesAllocV1<T>(A, std::forward<Args>(args)...)));
assert((doTestUsesAllocV2<T>(A, std::forward<Args>(args)...)));
}
}
int main()
{
using ET = std::experimental::erased_type;
using PMR = ex::memory_resource*;
using PMA = ex::polymorphic_allocator<void>;
using STDA = std::allocator<char>;
using TESTA = test_allocator<char>;
int value = 42;
const int cvalue = 43;
{
test_pmr_uses_alloc<ET>();
test_pmr_uses_alloc<PMR>();
test_pmr_uses_alloc<PMA>();
test_pmr_uses_alloc<ET>(value);
test_pmr_uses_alloc<PMR>(value);
test_pmr_uses_alloc<PMA>(value);
test_pmr_uses_alloc<ET>(cvalue);
test_pmr_uses_alloc<PMR>(cvalue);
test_pmr_uses_alloc<PMA>(cvalue);
test_pmr_uses_alloc<ET>(cvalue, std::move(value));
test_pmr_uses_alloc<PMR>(cvalue, std::move(value));
test_pmr_uses_alloc<PMA>(cvalue, std::move(value));
}
{
STDA std_alloc;
TESTA test_alloc(42);
test_non_pmr_uses_alloc<STDA>(std_alloc);
test_non_pmr_uses_alloc<TESTA>(test_alloc);
test_non_pmr_uses_alloc<STDA>(std_alloc, value);
test_non_pmr_uses_alloc<TESTA>(test_alloc, value);
test_non_pmr_uses_alloc<STDA>(std_alloc, cvalue);
test_non_pmr_uses_alloc<TESTA>(test_alloc, cvalue);
test_non_pmr_uses_alloc<STDA>(std_alloc, cvalue, std::move(value));
test_non_pmr_uses_alloc<TESTA>(test_alloc, cvalue, std::move(value));
}
}
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