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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2017 Red Hat, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <compare>
#include <gtest/gtest.h>
#include "common/static_ptr.h"
using ceph::static_ptr;
using ceph::make_static;
class base {
public:
virtual int func() = 0;
virtual ~base() = default;
};
class sibling1 : public base {
public:
int func() override { return 0; }
};
class sibling2 : public base {
public:
int func() override { return 9; }
virtual int call(int) = 0;
};
class grandchild : public sibling2 {
protected:
int val;
public:
explicit grandchild(int val) : val(val) {}
virtual int call(int n) override { return n * val; }
};
class great_grandchild : public grandchild {
public:
explicit great_grandchild(int val) : grandchild(val) {}
int call(int n) override { return n + val; }
};
#ifdef __cpp_lib_three_way_comparison
TEST(StaticPtr, EmptyCreation) {
static_ptr<base, sizeof(grandchild)> p;
EXPECT_FALSE(p);
EXPECT_EQ(p, nullptr);
EXPECT_EQ(nullptr, p);
EXPECT_TRUE(p.get() == nullptr);
}
TEST(StaticPtr, CreationCall) {
{
static_ptr<base, sizeof(grandchild)> p(std::in_place_type_t<sibling1>{});
EXPECT_TRUE(p);
EXPECT_FALSE(p == nullptr);
EXPECT_FALSE(nullptr == p);
EXPECT_FALSE(p.get() == nullptr);
EXPECT_EQ(p->func(), 0);
EXPECT_EQ((*p).func(), 0);
EXPECT_EQ((p.get())->func(), 0);
}
{
auto p = make_static<base, sibling1>();
EXPECT_TRUE(p);
EXPECT_FALSE(p == nullptr);
EXPECT_FALSE(nullptr == p);
EXPECT_FALSE(p.get() == nullptr);
EXPECT_EQ(p->func(), 0);
EXPECT_EQ((*p).func(), 0);
EXPECT_EQ((p.get())->func(), 0);
}
}
TEST(StaticPtr, CreateReset) {
{
static_ptr<base, sizeof(grandchild)> p(std::in_place_type_t<sibling1>{});
EXPECT_EQ((p.get())->func(), 0);
p.reset();
EXPECT_FALSE(p);
EXPECT_EQ(p, nullptr);
EXPECT_EQ(nullptr, p);
EXPECT_TRUE(p.get() == nullptr);
}
{
static_ptr<base, sizeof(grandchild)> p(std::in_place_type_t<sibling1>{});
EXPECT_EQ((p.get())->func(), 0);
p = nullptr;
EXPECT_FALSE(p);
EXPECT_EQ(p, nullptr);
EXPECT_EQ(nullptr, p);
EXPECT_TRUE(p.get() == nullptr);
}
}
#endif // __cpp_lib_three_way_comparison
TEST(StaticPtr, CreateEmplace) {
static_ptr<base, sizeof(grandchild)> p(std::in_place_type_t<sibling1>{});
EXPECT_EQ((p.get())->func(), 0);
p.emplace<grandchild>(30);
EXPECT_EQ(p->func(), 9);
}
TEST(StaticPtr, Move) {
// Won't compile. Good.
// static_ptr<base, sizeof(base)> p1(std::in_place_type_t<grandchild>{}, 3);
static_ptr<base, sizeof(base)> p1(std::in_place_type_t<sibling1>{});
static_ptr<base, sizeof(grandchild)> p2(std::in_place_type_t<grandchild>{},
3);
p2 = std::move(p1);
EXPECT_EQ(p1->func(), 0);
}
TEST(StaticPtr, ImplicitUpcast) {
static_ptr<base, sizeof(grandchild)> p1;
static_ptr<sibling2, sizeof(grandchild)> p2(std::in_place_type_t<grandchild>{}, 3);
p1 = std::move(p2);
EXPECT_EQ(p1->func(), 9);
p2.reset();
// Doesn't compile. Good.
// p2 = p1;
}
TEST(StaticPtr, StaticCast) {
static_ptr<base, sizeof(grandchild)> p1(std::in_place_type_t<grandchild>{}, 3);
static_ptr<sibling2, sizeof(grandchild)> p2;
p2 = ceph::static_pointer_cast<sibling2, sizeof(grandchild)>(std::move(p1));
EXPECT_EQ(p2->func(), 9);
EXPECT_EQ(p2->call(10), 30);
}
TEST(StaticPtr, DynamicCast) {
static constexpr auto sz = sizeof(great_grandchild);
{
static_ptr<base, sz> p1(std::in_place_type_t<grandchild>{}, 3);
auto p2 = ceph::dynamic_pointer_cast<great_grandchild, sz>(std::move(p1));
EXPECT_FALSE(p2);
}
{
static_ptr<base, sz> p1(std::in_place_type_t<grandchild>{}, 3);
auto p2 = ceph::dynamic_pointer_cast<grandchild, sz>(std::move(p1));
EXPECT_TRUE(p2);
EXPECT_EQ(p2->func(), 9);
EXPECT_EQ(p2->call(10), 30);
}
}
class constable {
public:
int foo() {
return 2;
}
int foo() const {
return 5;
}
};
TEST(StaticPtr, ConstCast) {
static constexpr auto sz = sizeof(constable);
{
auto p1 = make_static<const constable>();
EXPECT_EQ(p1->foo(), 5);
auto p2 = ceph::const_pointer_cast<constable, sz>(std::move(p1));
static_assert(!std::is_const<decltype(p2)::element_type>{},
"Things are more const than they ought to be.");
EXPECT_TRUE(p2);
EXPECT_EQ(p2->foo(), 2);
}
}
TEST(StaticPtr, ReinterpretCast) {
static constexpr auto sz = sizeof(grandchild);
{
auto p1 = make_static<grandchild>(3);
auto p2 = ceph::reinterpret_pointer_cast<constable, sz>(std::move(p1));
static_assert(std::is_same<decltype(p2)::element_type, constable>{},
"Reinterpret is screwy.");
auto p3 = ceph::reinterpret_pointer_cast<grandchild, sz>(std::move(p2));
static_assert(std::is_same<decltype(p3)::element_type, grandchild>{},
"Reinterpret is screwy.");
EXPECT_EQ(p3->func(), 9);
EXPECT_EQ(p3->call(10), 30);
}
}
struct exceptional {
exceptional() = default;
exceptional(const exceptional& e) {
throw std::exception();
}
exceptional(exceptional&& e) {
throw std::exception();
}
};
TEST(StaticPtr, Exceptional) {
static_ptr<exceptional> p1(std::in_place_type_t<exceptional>{});
EXPECT_ANY_THROW(static_ptr<exceptional> p2(std::move(p1)));
}
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