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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>
// shared_ptr
// template<class Y> explicit shared_ptr(const weak_ptr<Y>& r);
#include <cassert>
#include <memory>
#include <type_traits>
#include "test_macros.h"
struct B
{
static int count;
B() {++count;}
B(const B&) {++count;}
virtual ~B() {--count;}
};
int B::count = 0;
struct A
: public B
{
static int count;
A() {++count;}
A(const A& other) : B(other) {++count;}
~A() {--count;}
};
int A::count = 0;
// https://llvm.org/PR60258
// Invalid constructor SFINAE for std::shared_ptr's array ctors
static_assert(!std::is_constructible<std::shared_ptr<int>, const std::weak_ptr<long>&>::value, "");
static_assert( std::is_constructible<std::shared_ptr<B>, const std::weak_ptr<A>&>::value, "");
static_assert( std::is_constructible<std::shared_ptr<const A>, const std::weak_ptr<A>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<A>, const std::weak_ptr<const A>&>::value, "");
#if TEST_STD_VER >= 17
static_assert(!std::is_constructible<std::shared_ptr<int>, const std::weak_ptr<int[]>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int>, const std::weak_ptr<int[5]>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, const std::weak_ptr<int>&>::value, "");
static_assert( std::is_constructible<std::shared_ptr<int[]>, const std::weak_ptr<int[5]>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, const std::weak_ptr<int>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, const std::weak_ptr<int[]>&>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[7]>, const std::weak_ptr<int[5]>&>::value, "");
#endif
int main(int, char**)
{
#ifndef TEST_HAS_NO_EXCEPTIONS
{
std::weak_ptr<A> wp;
try
{
std::shared_ptr<A> sp(wp);
assert(false);
}
catch (std::bad_weak_ptr&)
{
}
assert(A::count == 0);
}
#endif
{
std::shared_ptr<A> sp0(new A);
std::weak_ptr<A> wp(sp0);
std::shared_ptr<A> sp(wp);
assert(sp.use_count() == 2);
assert(sp.get() == sp0.get());
assert(A::count == 1);
}
assert(A::count == 0);
{
std::shared_ptr<A const> sp0(new A);
std::weak_ptr<A const> wp(sp0);
std::shared_ptr<A const> sp(wp);
assert(sp.use_count() == 2);
assert(sp.get() == sp0.get());
assert(A::count == 1);
}
assert(A::count == 0);
#ifndef TEST_HAS_NO_EXCEPTIONS
{
std::shared_ptr<A> sp0(new A);
std::weak_ptr<A> wp(sp0);
sp0.reset();
try
{
std::shared_ptr<A> sp(wp);
assert(false);
}
catch (std::bad_weak_ptr&)
{
}
}
assert(A::count == 0);
#endif
#if TEST_STD_VER > 14
{
std::shared_ptr<A[]> sp0(new A[8]);
std::weak_ptr<A[]> wp(sp0);
std::shared_ptr<const A[]> sp(wp);
assert(sp.use_count() == 2);
assert(sp.get() == sp0.get());
assert(A::count == 8);
}
assert(A::count == 0);
#endif
return 0;
}
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