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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03
// <memory>
// unique_ptr
// Test unique_ptr converting move assignment
#include <memory>
#include <utility>
#include <cassert>
#include "test_macros.h"
#include "deleter_types.h"
#include "unique_ptr_test_helper.h"
template <class APtr, class BPtr>
void testAssign(APtr& aptr, BPtr& bptr) {
A* p = bptr.get();
assert(A::count == 2);
aptr = std::move(bptr);
assert(aptr.get() == p);
assert(bptr.get() == 0);
assert(A::count == 1);
assert(B::count == 1);
}
template <class LHS, class RHS>
void checkDeleter(LHS& lhs, RHS& rhs, int LHSState, int RHSState) {
assert(lhs.get_deleter().state() == LHSState);
assert(rhs.get_deleter().state() == RHSState);
}
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_assignable<UA, UB&&>::value, "");
static_assert(!std::is_assignable<UA, UB&>::value, "");
static_assert(!std::is_assignable<UA, const UB&>::value, "");
}
{ // cannot move if the deleter-types cannot convert
static_assert(std::is_assignable<UAD, UBD&&>::value, "");
static_assert(!std::is_assignable<UAD, UB&&>::value, "");
static_assert(!std::is_assignable<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_assignable<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_assignable<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_assignable<UA1, UA2&&>::value, "");
static_assert(!std::is_assignable<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_assignable<UA1, UA2&&>::value, "");
static_assert(!std::is_assignable<UA1, UB1&&>::value, "");
}
}
int main(int, char**) {
test_sfinae();
{
std::unique_ptr<B> bptr(new B);
std::unique_ptr<A> aptr(new A);
testAssign(aptr, bptr);
}
assert(A::count == 0);
assert(B::count == 0);
{
Deleter<B> del(42);
std::unique_ptr<B, Deleter<B> > bptr(new B, std::move(del));
std::unique_ptr<A, Deleter<A> > aptr(new A);
testAssign(aptr, bptr);
checkDeleter(aptr, bptr, 42, 0);
}
assert(A::count == 0);
assert(B::count == 0);
{
CDeleter<A> adel(6);
CDeleter<B> bdel(42);
std::unique_ptr<B, CDeleter<B>&> bptr(new B, bdel);
std::unique_ptr<A, CDeleter<A>&> aptr(new A, adel);
testAssign(aptr, bptr);
checkDeleter(aptr, bptr, 42, 42);
}
assert(A::count == 0);
assert(B::count == 0);
return 0;
}
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