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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 ctor
#include <memory>
#include <cassert>
#include "test_macros.h"
#include "type_id.h"
#include "unique_ptr_test_helper.h"
template <int ID = 0>
struct GenericDeleter {
void operator()(void*) const {}
};
template <int ID = 0>
struct GenericConvertingDeleter {
template <int OID>
GenericConvertingDeleter(GenericConvertingDeleter<OID>) {}
void operator()(void*) const {}
};
template <class Templ, class Other>
struct is_specialization;
template <template <int> class Templ, int ID1, class Other>
struct is_specialization<Templ<ID1>, Other> : std::false_type {};
template <template <int> class Templ, int ID1, int ID2>
struct is_specialization<Templ<ID1>, Templ<ID2> > : std::true_type {};
template <class Templ, class Other>
using EnableIfSpecialization = typename std::enable_if<
is_specialization<Templ, typename std::decay<Other>::type >::value
>::type;
template <int ID>
struct TrackingDeleter {
TrackingDeleter() : arg_type(&makeArgumentID<>()) {}
TrackingDeleter(TrackingDeleter const&)
: arg_type(&makeArgumentID<TrackingDeleter const&>()) {}
TrackingDeleter(TrackingDeleter&&)
: arg_type(&makeArgumentID<TrackingDeleter &&>()) {}
template <class T, class = EnableIfSpecialization<TrackingDeleter, T> >
TrackingDeleter(T&&) : arg_type(&makeArgumentID<T&&>()) {}
TrackingDeleter& operator=(TrackingDeleter const&) {
arg_type = &makeArgumentID<TrackingDeleter const&>();
return *this;
}
TrackingDeleter& operator=(TrackingDeleter &&) {
arg_type = &makeArgumentID<TrackingDeleter &&>();
return *this;
}
template <class T, class = EnableIfSpecialization<TrackingDeleter, T> >
TrackingDeleter& operator=(T&&) {
arg_type = &makeArgumentID<T&&>();
return *this;
}
void operator()(void*) const {}
public:
TypeID const* reset() const {
TypeID const* tmp = arg_type;
arg_type = nullptr;
return tmp;
}
mutable TypeID const* arg_type;
};
template <class ExpectT, int ID>
bool checkArg(TrackingDeleter<ID> const& d) {
return d.arg_type && *d.arg_type == makeArgumentID<ExpectT>();
}
template <bool IsArray>
void test_sfinae() {
typedef typename std::conditional<IsArray, A[], A>::type VT;
{ // Test that different non-reference deleter types are allowed so long
// as they convert to each other.
using U1 = std::unique_ptr<VT, GenericConvertingDeleter<0> >;
using U2 = std::unique_ptr<VT, GenericConvertingDeleter<1> >;
static_assert(std::is_constructible<U1, U2&&>::value, "");
}
{ // Test that different non-reference deleter types are disallowed when
// they cannot convert.
using U1 = std::unique_ptr<VT, GenericDeleter<0> >;
using U2 = std::unique_ptr<VT, GenericDeleter<1> >;
static_assert(!std::is_constructible<U1, U2&&>::value, "");
}
{ // Test that if the destination deleter is a reference type then only
// exact matches are allowed.
using U1 = std::unique_ptr<VT, GenericConvertingDeleter<0> const& >;
using U2 = std::unique_ptr<VT, GenericConvertingDeleter<0> >;
using U3 = std::unique_ptr<VT, GenericConvertingDeleter<0> &>;
using U4 = std::unique_ptr<VT, GenericConvertingDeleter<1> >;
using U5 = std::unique_ptr<VT, GenericConvertingDeleter<1> const&>;
static_assert(!std::is_constructible<U1, U2&&>::value, "");
static_assert(!std::is_constructible<U1, U3&&>::value, "");
static_assert(!std::is_constructible<U1, U4&&>::value, "");
static_assert(!std::is_constructible<U1, U5&&>::value, "");
using U1C = std::unique_ptr<const VT, GenericConvertingDeleter<0> const&>;
static_assert(std::is_nothrow_constructible<U1C, U1&&>::value, "");
}
{ // Test that non-reference destination deleters can be constructed
// from any source deleter type with a suitable conversion. Including
// reference types.
using U1 = std::unique_ptr<VT, GenericConvertingDeleter<0> >;
using U2 = std::unique_ptr<VT, GenericConvertingDeleter<0> &>;
using U3 = std::unique_ptr<VT, GenericConvertingDeleter<0> const &>;
using U4 = std::unique_ptr<VT, GenericConvertingDeleter<1> >;
using U5 = std::unique_ptr<VT, GenericConvertingDeleter<1> &>;
using U6 = std::unique_ptr<VT, GenericConvertingDeleter<1> const&>;
static_assert(std::is_constructible<U1, U2&&>::value, "");
static_assert(std::is_constructible<U1, U3&&>::value, "");
static_assert(std::is_constructible<U1, U4&&>::value, "");
static_assert(std::is_constructible<U1, U5&&>::value, "");
static_assert(std::is_constructible<U1, U6&&>::value, "");
}
}
template <bool IsArray>
void test_noexcept() {
typedef typename std::conditional<IsArray, A[], A>::type VT;
{
typedef std::unique_ptr<const VT> APtr;
typedef std::unique_ptr<VT> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<const VT, CDeleter<const VT> > APtr;
typedef std::unique_ptr<VT, CDeleter<VT> > BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<const VT, NCDeleter<const VT>&> APtr;
typedef std::unique_ptr<VT, NCDeleter<const VT>&> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
{
typedef std::unique_ptr<const VT, const NCConstDeleter<const VT>&> APtr;
typedef std::unique_ptr<VT, const NCConstDeleter<const VT>&> BPtr;
static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, "");
}
}
template <bool IsArray>
void test_deleter_value_category() {
typedef typename std::conditional<IsArray, A[], A>::type VT;
using TD1 = TrackingDeleter<1>;
using TD2 = TrackingDeleter<2>;
TD1 d1;
TD2 d2;
{ // Test non-reference deleter conversions
using U1 = std::unique_ptr<VT, TD1 >;
using U2 = std::unique_ptr<VT, TD2 >;
U2 u2;
u2.get_deleter().reset();
U1 u1(std::move(u2));
assert(checkArg<TD2&&>(u1.get_deleter()));
}
{ // Test assignment from non-const ref
using U1 = std::unique_ptr<VT, TD1 >;
using U2 = std::unique_ptr<VT, TD2& >;
U2 u2(nullptr, d2);
U1 u1(std::move(u2));
assert(checkArg<TD2&>(u1.get_deleter()));
}
{ // Test assignment from const ref
using U1 = std::unique_ptr<VT, TD1 >;
using U2 = std::unique_ptr<VT, TD2 const& >;
U2 u2(nullptr, d2);
U1 u1(std::move(u2));
assert(checkArg<TD2 const&>(u1.get_deleter()));
}
}
int main(int, char**) {
{
test_sfinae</*IsArray*/false>();
test_noexcept<false>();
test_deleter_value_category<false>();
}
{
test_sfinae</*IsArray*/true>();
test_noexcept<true>();
test_deleter_value_category<true>();
}
return 0;
}
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