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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 converting move ctor
// NOTE: unique_ptr does not provide converting constructors in C++03
// UNSUPPORTED: c++03
#include <memory>
#include <type_traits>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "unique_ptr_test_helper.h"
// test converting move ctor. Should only require a MoveConstructible deleter, or if
// deleter is a reference, not even that.
// Explicit version
template <class LHS, class RHS>
void checkReferenceDeleter(LHS& lhs, RHS& rhs) {
typedef typename LHS::deleter_type NewDel;
static_assert(std::is_reference<NewDel>::value, "");
rhs.get_deleter().set_state(42);
assert(rhs.get_deleter().state() == 42);
assert(lhs.get_deleter().state() == 42);
lhs.get_deleter().set_state(99);
assert(lhs.get_deleter().state() == 99);
assert(rhs.get_deleter().state() == 99);
}
template <class LHS, class RHS>
void checkDeleter(LHS& lhs, RHS& rhs, int LHSVal, int RHSVal) {
assert(lhs.get_deleter().state() == LHSVal);
assert(rhs.get_deleter().state() == RHSVal);
}
template <class LHS, class RHS>
void checkCtor(LHS& lhs, RHS& rhs, A* RHSVal) {
assert(lhs.get() == RHSVal);
assert(rhs.get() == nullptr);
assert(A::count == 1);
assert(B::count == 1);
}
void checkNoneAlive() {
assert(A::count == 0);
assert(B::count == 0);
}
template <class T>
struct NCConvertingDeleter {
NCConvertingDeleter() = default;
NCConvertingDeleter(NCConvertingDeleter const&) = delete;
NCConvertingDeleter(NCConvertingDeleter&&) = default;
template <class U>
NCConvertingDeleter(NCConvertingDeleter<U>&&) {}
void operator()(T*) const {}
};
template <class T>
struct NCConvertingDeleter<T[]> {
NCConvertingDeleter() = default;
NCConvertingDeleter(NCConvertingDeleter const&) = delete;
NCConvertingDeleter(NCConvertingDeleter&&) = default;
template <class U>
NCConvertingDeleter(NCConvertingDeleter<U>&&) {}
void operator()(T*) const {}
};
struct NCGenericDeleter {
NCGenericDeleter() = default;
NCGenericDeleter(NCGenericDeleter const&) = delete;
NCGenericDeleter(NCGenericDeleter&&) = default;
void operator()(void*) const {}
};
void test_sfinae() {
using DA = NCConvertingDeleter<A>; // non-copyable deleters
using DB = NCConvertingDeleter<B>;
using UA = std::unique_ptr<A>;
using UB = std::unique_ptr<B>;
using UAD = std::unique_ptr<A, DA>;
using UBD = std::unique_ptr<B, DB>;
{ // cannot move from an lvalue
static_assert(std::is_constructible<UA, UB&&>::value, "");
static_assert(!std::is_constructible<UA, UB&>::value, "");
static_assert(!std::is_constructible<UA, const UB&>::value, "");
}
{ // cannot move if the deleter-types cannot convert
static_assert(std::is_constructible<UAD, UBD&&>::value, "");
static_assert(!std::is_constructible<UAD, UB&&>::value, "");
static_assert(!std::is_constructible<UA, UBD&&>::value, "");
}
{ // cannot move-convert with reference deleters of different types
using UA1 = std::unique_ptr<A, DA&>;
using UB1 = std::unique_ptr<B, DB&>;
static_assert(!std::is_constructible<UA1, UB1&&>::value, "");
}
{ // cannot move-convert with reference deleters of different types
using UA1 = std::unique_ptr<A, const DA&>;
using UB1 = std::unique_ptr<B, const DB&>;
static_assert(!std::is_constructible<UA1, UB1&&>::value, "");
}
{ // cannot move-convert from unique_ptr<Array[]>
using UA1 = std::unique_ptr<A>;
using UA2 = std::unique_ptr<A[]>;
using UB1 = std::unique_ptr<B[]>;
static_assert(!std::is_constructible<UA1, UA2&&>::value, "");
static_assert(!std::is_constructible<UA1, UB1&&>::value, "");
}
{ // cannot move-convert from unique_ptr<Array[]>
using UA1 = std::unique_ptr<A, NCGenericDeleter>;
using UA2 = std::unique_ptr<A[], NCGenericDeleter>;
using UB1 = std::unique_ptr<B[], NCGenericDeleter>;
static_assert(!std::is_constructible<UA1, UA2&&>::value, "");
static_assert(!std::is_constructible<UA1, UB1&&>::value, "");
}
}
void test_noexcept() {
{
typedef std::unique_ptr<A> APtr;
typedef std::unique_ptr<B> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<A, Deleter<A> > APtr;
typedef std::unique_ptr<B, Deleter<B> > BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<A, NCDeleter<A>&> APtr;
typedef std::unique_ptr<B, NCDeleter<A>&> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<A, const NCConstDeleter<A>&> APtr;
typedef std::unique_ptr<B, const NCConstDeleter<A>&> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
}
int main(int, char**) {
{
test_sfinae();
test_noexcept();
}
{
typedef std::unique_ptr<A> APtr;
typedef std::unique_ptr<B> BPtr;
{ // explicit
BPtr b(new B);
A* p = b.get();
APtr a(std::move(b));
checkCtor(a, b, p);
}
checkNoneAlive();
{ // implicit
BPtr b(new B);
A* p = b.get();
APtr a = std::move(b);
checkCtor(a, b, p);
}
checkNoneAlive();
}
{ // test with moveable deleters
typedef std::unique_ptr<A, Deleter<A> > APtr;
typedef std::unique_ptr<B, Deleter<B> > BPtr;
{
Deleter<B> del(5);
BPtr b(new B, std::move(del));
A* p = b.get();
APtr a(std::move(b));
checkCtor(a, b, p);
checkDeleter(a, b, 5, 0);
}
checkNoneAlive();
{
Deleter<B> del(5);
BPtr b(new B, std::move(del));
A* p = b.get();
APtr a = std::move(b);
checkCtor(a, b, p);
checkDeleter(a, b, 5, 0);
}
checkNoneAlive();
}
{ // test with reference deleters
typedef std::unique_ptr<A, NCDeleter<A>&> APtr;
typedef std::unique_ptr<B, NCDeleter<A>&> BPtr;
NCDeleter<A> del(5);
{
BPtr b(new B, del);
A* p = b.get();
APtr a(std::move(b));
checkCtor(a, b, p);
checkReferenceDeleter(a, b);
}
checkNoneAlive();
{
BPtr b(new B, del);
A* p = b.get();
APtr a = std::move(b);
checkCtor(a, b, p);
checkReferenceDeleter(a, b);
}
checkNoneAlive();
}
{
typedef std::unique_ptr<A, CDeleter<A> > APtr;
typedef std::unique_ptr<B, CDeleter<B>&> BPtr;
CDeleter<B> del(5);
{
BPtr b(new B, del);
A* p = b.get();
APtr a(std::move(b));
checkCtor(a, b, p);
checkDeleter(a, b, 5, 5);
}
checkNoneAlive();
{
BPtr b(new B, del);
A* p = b.get();
APtr a = std::move(b);
checkCtor(a, b, p);
checkDeleter(a, b, 5, 5);
}
checkNoneAlive();
}
return 0;
}
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