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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
//
//===----------------------------------------------------------------------===//
// <memory>
// unique_ptr
// Test unique_ptr move ctor
#include <memory>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "unique_ptr_test_helper.h"
//=============================================================================
// TESTING unique_ptr(unique_ptr&&)
//
// Concerns
// 1 The moved from pointer is empty and the new pointer stores the old value.
// 2 The only requirement on the deleter is that it is MoveConstructible
// or a reference.
// 3 The constructor works for explicitly moved values (i.e. std::move(x))
// 4 The constructor works for true temporaries (e.g. a return value)
//
// Plan
// 1 Explicitly construct unique_ptr<T, D> for various deleter types 'D'.
// check that the value and deleter have been properly moved. (C-1,2,3)
//
// 2 Use the expression 'sink(source())' to move construct a unique_ptr<T, D>
// from a temporary. 'source' should return the unique_ptr by value and
// 'sink' should accept the unique_ptr by value. (C-1,2,4)
template <class VT>
std::unique_ptr<VT> source1() {
return std::unique_ptr<VT>(newValue<VT>(1));
}
template <class VT>
std::unique_ptr<VT, Deleter<VT> > source2() {
return std::unique_ptr<VT, Deleter<VT> >(newValue<VT>(1), Deleter<VT>(5));
}
template <class VT>
std::unique_ptr<VT, NCDeleter<VT>&> source3() {
static NCDeleter<VT> d(5);
return std::unique_ptr<VT, NCDeleter<VT>&>(newValue<VT>(1), d);
}
template <class VT>
void sink1(std::unique_ptr<VT> p) {
assert(p.get() != nullptr);
}
template <class VT>
void sink2(std::unique_ptr<VT, Deleter<VT> > p) {
assert(p.get() != nullptr);
assert(p.get_deleter().state() == 5);
}
template <class VT>
void sink3(std::unique_ptr<VT, NCDeleter<VT>&> p) {
assert(p.get() != nullptr);
assert(p.get_deleter().state() == 5);
assert(&p.get_deleter() == &source3<VT>().get_deleter());
}
template <class ValueT>
void test_sfinae() {
typedef std::unique_ptr<ValueT> U;
{ // Ensure unique_ptr is non-copyable
static_assert((!std::is_constructible<U, U const&>::value), "");
static_assert((!std::is_constructible<U, U&>::value), "");
}
}
template <bool IsArray>
void test_basic() {
typedef typename std::conditional<!IsArray, A, A[]>::type VT;
const int expect_alive = IsArray ? 5 : 1;
{
typedef std::unique_ptr<VT> APtr;
APtr s(newValue<VT>(expect_alive));
A* p = s.get();
APtr s2 = std::move(s);
assert(s2.get() == p);
assert(s.get() == 0);
assert(A::count == expect_alive);
}
assert(A::count == 0);
{
typedef Deleter<VT> MoveDel;
typedef std::unique_ptr<VT, MoveDel> APtr;
MoveDel d(5);
APtr s(newValue<VT>(expect_alive), std::move(d));
assert(d.state() == 0);
assert(s.get_deleter().state() == 5);
A* p = s.get();
APtr s2 = std::move(s);
assert(s2.get() == p);
assert(s.get() == 0);
assert(A::count == expect_alive);
assert(s2.get_deleter().state() == 5);
assert(s.get_deleter().state() == 0);
}
assert(A::count == 0);
{
typedef NCDeleter<VT> NonCopyDel;
typedef std::unique_ptr<VT, NonCopyDel&> APtr;
NonCopyDel d;
APtr s(newValue<VT>(expect_alive), d);
A* p = s.get();
APtr s2 = std::move(s);
assert(s2.get() == p);
assert(s.get() == 0);
assert(A::count == expect_alive);
d.set_state(6);
assert(s2.get_deleter().state() == d.state());
assert(s.get_deleter().state() == d.state());
}
assert(A::count == 0);
{
sink1<VT>(source1<VT>());
assert(A::count == 0);
sink2<VT>(source2<VT>());
assert(A::count == 0);
sink3<VT>(source3<VT>());
assert(A::count == 0);
}
assert(A::count == 0);
}
template <class VT>
void test_noexcept() {
#if TEST_STD_VER >= 11
{
typedef std::unique_ptr<VT> U;
static_assert(std::is_nothrow_move_constructible<U>::value, "");
}
{
typedef std::unique_ptr<VT, Deleter<VT> > U;
static_assert(std::is_nothrow_move_constructible<U>::value, "");
}
{
typedef std::unique_ptr<VT, NCDeleter<VT> &> U;
static_assert(std::is_nothrow_move_constructible<U>::value, "");
}
{
typedef std::unique_ptr<VT, const NCConstDeleter<VT> &> U;
static_assert(std::is_nothrow_move_constructible<U>::value, "");
}
#endif
}
int main(int, char**) {
{
test_basic</*IsArray*/ false>();
test_sfinae<int>();
test_noexcept<int>();
}
{
test_basic</*IsArray*/ true>();
test_sfinae<int[]>();
test_noexcept<int[]>();
}
return 0;
}
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