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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>
// template<class Y> explicit shared_ptr(Y* p);
#include <cassert>
#include <memory>
#include <type_traits>
#include "test_macros.h"
struct A
{
static int count;
A() {++count;}
A(const A&) {++count;}
~A() {--count;}
};
int A::count = 0;
struct derived : A {};
// https://llvm.org/PR60258
// Invalid constructor SFINAE for std::shared_ptr's array ctors
static_assert( std::is_constructible<std::shared_ptr<int>, int*>::value, "");
static_assert( std::is_constructible<std::shared_ptr<A>, derived*>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<A>, int*>::value, "");
#if TEST_STD_VER >= 17
static_assert( std::is_constructible<std::shared_ptr<int[]>, int*>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[]>, int(*)[]>::value, "");
static_assert( std::is_constructible<std::shared_ptr<int[5]>, int*>::value, "");
static_assert(!std::is_constructible<std::shared_ptr<int[5]>, int(*)[5]>::value, "");
#endif
// Test explicit
static_assert(std::is_constructible<std::shared_ptr<int>, int*>::value, "");
static_assert(!std::is_convertible<int*, std::shared_ptr<int> >::value, "");
int main(int, char**)
{
{
assert(A::count == 0);
A* ptr = new A;
std::shared_ptr<A> p(ptr);
assert(A::count == 1);
assert(p.use_count() == 1);
assert(p.get() == ptr);
}
{
assert(A::count == 0);
A const* ptr = new A;
std::shared_ptr<A const> p(ptr);
assert(A::count == 1);
assert(p.use_count() == 1);
assert(p.get() == ptr);
}
{
assert(A::count == 0);
A* ptr = new A;
std::shared_ptr<void> p(ptr);
assert(A::count == 1);
assert(p.use_count() == 1);
assert(p.get() == ptr);
}
#if TEST_STD_VER > 14
{
assert(A::count == 0);
std::shared_ptr<A[8]> pA(new A[8]);
assert(pA.use_count() == 1);
assert(A::count == 8);
}
{
assert(A::count == 0);
std::shared_ptr<A[]> pA(new A[8]);
assert(pA.use_count() == 1);
assert(A::count == 8);
}
{
assert(A::count == 0);
std::shared_ptr<const A[]> pA(new A[8]);
assert(pA.use_count() == 1);
assert(A::count == 8);
}
{
assert(A::count == 0);
std::shared_ptr<A> pA(new derived);
assert(pA.use_count() == 1);
assert(A::count == 1);
}
#endif
return 0;
}
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