blob: a977fd31cfedc3f687532f669a3ba586860731ff [file] [log] [blame]
#include <array>
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
#include <type_traits>
#include <gtest/gtest.h>
#include <pdx/rpc/variant.h>
using namespace android::pdx;
using namespace android::pdx::rpc;
namespace {
struct BaseType {
// NOLINTNEXTLINE(google-explicit-constructor)
BaseType(int value) : value(value) {}
int value;
};
struct DerivedType : BaseType {
// NOLINTNEXTLINE(google-explicit-constructor)
DerivedType(int value) : BaseType{value} {};
};
template <typename T>
class TestType {
public:
// NOLINTNEXTLINE(google-explicit-constructor)
TestType(const T& value) : value_(value) {}
// NOLINTNEXTLINE(google-explicit-constructor)
TestType(T&& value) : value_(std::move(value)) {}
TestType(const TestType&) = default;
TestType(TestType&&) = default;
TestType& operator=(const TestType&) = default;
TestType& operator=(TestType&&) = default;
const T& get() const { return value_; }
T&& take() { return std::move(value_); }
private:
T value_;
};
template <typename T>
class InstrumentType {
public:
// NOLINTNEXTLINE(google-explicit-constructor)
InstrumentType(const T& value) : value_(value) { constructor_count_++; }
// NOLINTNEXTLINE(google-explicit-constructor)
InstrumentType(T&& value) : value_(std::move(value)) { constructor_count_++; }
InstrumentType(const InstrumentType& other) : value_(other.value_) {
constructor_count_++;
}
InstrumentType(InstrumentType&& other) : value_(std::move(other.value_)) {
constructor_count_++;
}
// NOLINTNEXTLINE(google-explicit-constructor)
InstrumentType(const TestType<T>& other) : value_(other.get()) {
constructor_count_++;
}
// NOLINTNEXTLINE(google-explicit-constructor)
InstrumentType(TestType<T>&& other) : value_(other.take()) {
constructor_count_++;
}
~InstrumentType() { destructor_count_++; }
InstrumentType& operator=(const InstrumentType& other) {
copy_assignment_count_++;
value_ = other.value_;
return *this;
}
InstrumentType& operator=(InstrumentType&& other) {
move_assignment_count_++;
value_ = std::move(other.value_);
return *this;
}
InstrumentType& operator=(const TestType<T>& other) {
copy_assignment_count_++;
value_ = other.get();
return *this;
}
InstrumentType& operator=(TestType<T>&& other) {
move_assignment_count_++;
value_ = other.take();
return *this;
}
static std::size_t constructor_count() { return constructor_count_; }
static std::size_t destructor_count() { return destructor_count_; }
static std::size_t move_assignment_count() { return move_assignment_count_; }
static std::size_t copy_assignment_count() { return copy_assignment_count_; }
const T& get() const { return value_; }
T&& take() { return std::move(value_); }
static void clear() {
constructor_count_ = 0;
destructor_count_ = 0;
move_assignment_count_ = 0;
copy_assignment_count_ = 0;
}
private:
T value_;
static std::size_t constructor_count_;
static std::size_t destructor_count_;
static std::size_t move_assignment_count_;
static std::size_t copy_assignment_count_;
};
template <typename T>
std::size_t InstrumentType<T>::constructor_count_ = 0;
template <typename T>
std::size_t InstrumentType<T>::destructor_count_ = 0;
template <typename T>
std::size_t InstrumentType<T>::move_assignment_count_ = 0;
template <typename T>
std::size_t InstrumentType<T>::copy_assignment_count_ = 0;
} // anonymous namespace
TEST(Variant, Assignment) {
// Assert basic type properties.
{
Variant<int, bool, float> v;
ASSERT_EQ(-1, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_FALSE(v.is<bool>());
ASSERT_FALSE(v.is<float>());
}
{
Variant<int, bool, float> v;
v = 10;
ASSERT_EQ(0, v.index());
ASSERT_TRUE(v.is<int>());
ASSERT_FALSE(v.is<bool>());
ASSERT_FALSE(v.is<float>());
EXPECT_EQ(10, std::get<int>(v));
}
{
Variant<int, bool, float> v;
v = false;
ASSERT_EQ(1, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_TRUE(v.is<bool>());
ASSERT_FALSE(v.is<float>());
EXPECT_EQ(false, std::get<bool>(v));
}
{
Variant<int, bool, float> v;
v = 1.0f;
ASSERT_EQ(2, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_FALSE(v.is<bool>());
ASSERT_TRUE(v.is<float>());
EXPECT_FLOAT_EQ(1.0f, std::get<float>(v));
}
{
Variant<int, bool, float> v;
// ERROR: More than one type is implicitly convertible from double.
// v = 1.0;
v = static_cast<float>(1.0);
}
{
Variant<int, bool, float> v;
double x = 1.1;
v = static_cast<float>(x);
ASSERT_EQ(2, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_FALSE(v.is<bool>());
ASSERT_TRUE(v.is<float>());
EXPECT_FLOAT_EQ(1.1, std::get<float>(v));
}
{
Variant<int, std::string> v;
ASSERT_EQ(-1, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_FALSE(v.is<std::string>());
}
{
Variant<int, std::string> v;
v = 20;
ASSERT_EQ(0, v.index());
ASSERT_TRUE(v.is<int>());
ASSERT_FALSE(v.is<std::string>());
EXPECT_EQ(20, std::get<int>(v));
}
{
Variant<int, std::string> v;
v = std::string("test");
ASSERT_EQ(1, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(v));
}
{
Variant<int, std::string> v;
v = "test";
ASSERT_EQ(1, v.index());
ASSERT_FALSE(v.is<int>());
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(v));
}
{
Variant<const char*> v1;
Variant<std::string> v2;
v1 = "test";
ASSERT_TRUE(v1.is<const char*>());
v2 = v1;
ASSERT_TRUE(v2.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(v2));
}
{
Variant<int> a(1);
Variant<int> b;
ASSERT_TRUE(!a.empty());
ASSERT_TRUE(b.empty());
a = b;
ASSERT_TRUE(a.empty());
ASSERT_TRUE(b.empty());
}
{
Variant<int*, char*> v;
// ERROR: More than one type is implicitly convertible from nullptr.
// v = nullptr;
v = static_cast<int*>(nullptr);
EXPECT_TRUE(v.is<int*>());
v = static_cast<char*>(nullptr);
EXPECT_TRUE(v.is<char*>());
}
{
Variant<int*, char*> v;
int a = 10;
char b = 20;
v = &b;
ASSERT_TRUE(v.is<char*>());
EXPECT_EQ(&b, std::get<char*>(v));
EXPECT_EQ(b, *std::get<char*>(v));
v = &a;
ASSERT_TRUE(v.is<int*>());
EXPECT_EQ(&a, std::get<int*>(v));
EXPECT_EQ(a, *std::get<int*>(v));
}
{
using IntRef = std::reference_wrapper<int>;
Variant<IntRef> v;
int a = 10;
v = a;
ASSERT_TRUE(v.is<IntRef>());
EXPECT_EQ(a, std::get<IntRef>(v));
a = 20;
EXPECT_EQ(a, std::get<IntRef>(v));
}
}
TEST(Variant, MoveAssignment) {
{
Variant<std::string> v;
std::string s = "test";
v = std::move(s);
EXPECT_TRUE(s.empty());
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(v));
}
{
Variant<std::string> v("test");
std::string s = "fizz";
s = std::move(std::get<std::string>(v));
ASSERT_TRUE(v.is<std::string>());
EXPECT_TRUE(std::get<std::string>(v).empty());
EXPECT_EQ("test", s);
}
{
Variant<std::string> a("test");
Variant<std::string> b;
b = std::move(a);
ASSERT_TRUE(a.is<std::string>());
ASSERT_TRUE(b.is<std::string>());
EXPECT_TRUE(std::get<std::string>(a).empty());
EXPECT_EQ("test", std::get<std::string>(b));
}
{
Variant<std::string> a("test");
Variant<std::string> b("fizz");
b = std::move(a);
ASSERT_TRUE(a.is<std::string>());
ASSERT_TRUE(b.is<std::string>());
EXPECT_TRUE(std::get<std::string>(a).empty());
EXPECT_EQ("test", std::get<std::string>(b));
}
{
Variant<int, std::string> a("test");
Variant<int, std::string> b(10);
b = std::move(a);
ASSERT_TRUE(a.is<std::string>());
ASSERT_TRUE(b.is<std::string>());
EXPECT_TRUE(std::get<std::string>(a).empty());
EXPECT_EQ("test", std::get<std::string>(b));
}
{
Variant<int, std::string> a(10);
Variant<int, std::string> b("test");
b = std::move(a);
ASSERT_TRUE(a.is<int>());
ASSERT_TRUE(b.is<int>());
EXPECT_EQ(10, std::get<int>(a));
EXPECT_EQ(10, std::get<int>(b));
}
}
TEST(Variant, Constructor) {
{
Variant<int, bool, float> v(true);
EXPECT_TRUE(v.is<bool>());
}
{
Variant<int, bool, float> v(10);
EXPECT_TRUE(v.is<int>());
}
{
Variant<int, bool, float> v(10.1f);
EXPECT_TRUE(v.is<float>());
}
{
Variant<float, std::string> v(10.);
EXPECT_TRUE(v.is<float>());
}
{
TestType<int> i(1);
Variant<int, bool, float> v(i.take());
ASSERT_TRUE(v.is<int>());
EXPECT_EQ(1, std::get<int>(v));
}
{
TestType<int> i(1);
Variant<int, bool, float> v(i.get());
ASSERT_TRUE(v.is<int>());
EXPECT_EQ(1, std::get<int>(v));
}
{
TestType<bool> b(true);
Variant<int, bool, float> v(b.take());
ASSERT_TRUE(v.is<bool>());
EXPECT_EQ(true, std::get<bool>(v));
}
{
TestType<bool> b(true);
Variant<int, bool, float> v(b.get());
ASSERT_TRUE(v.is<bool>());
EXPECT_EQ(true, std::get<bool>(v));
}
{
Variant<const char*> c("test");
Variant<std::string> s(c);
ASSERT_TRUE(s.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(s));
}
{
Variant<int, bool, float> a(true);
Variant<int, bool, float> b(a);
ASSERT_TRUE(b.is<bool>());
}
{
using IntRef = std::reference_wrapper<int>;
int a = 10;
Variant<IntRef> v(a);
TestType<IntRef> t(a);
ASSERT_TRUE(v.is<IntRef>());
EXPECT_EQ(a, std::get<IntRef>(v));
EXPECT_EQ(a, t.get());
a = 20;
EXPECT_EQ(a, std::get<IntRef>(v));
EXPECT_EQ(a, t.get());
}
}
// Verify correct ctor/dtor and assignment behavior used an instrumented type.
TEST(Variant, CopyMoveConstructAssign) {
{
InstrumentType<int>::clear();
// Default construct to empty, no InstrumentType activity.
Variant<int, InstrumentType<int>> v;
ASSERT_EQ(0u, InstrumentType<int>::constructor_count());
ASSERT_EQ(0u, InstrumentType<int>::destructor_count());
ASSERT_EQ(0u, InstrumentType<int>::move_assignment_count());
ASSERT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from int type, no InstrumentType activity.
Variant<int, InstrumentType<int>> v;
v = 10;
EXPECT_EQ(0u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from int type, no InstrumentType activity.
Variant<int, InstrumentType<int>> v(10);
EXPECT_EQ(0u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v;
v = InstrumentType<int>(25);
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(1u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v(InstrumentType<int>(25));
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(1u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v(InstrumentType<int>(25));
// Assign from temporary, temporary ctor/dtor.
v = InstrumentType<int>(35);
EXPECT_EQ(3u, InstrumentType<int>::constructor_count());
EXPECT_EQ(2u, InstrumentType<int>::destructor_count());
EXPECT_EQ(1u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v(InstrumentType<int>(25));
// dtor.
v = 10;
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(2u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v(InstrumentType<int>(25));
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(1u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(2u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
{
InstrumentType<int>::clear();
// Construct from other temporary.
Variant<int, InstrumentType<int>> v(TestType<int>(10));
EXPECT_EQ(1u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from other temporary.
Variant<int, InstrumentType<int>> v(TestType<int>(10));
// Assign from other temporary.
v = TestType<int>(11);
EXPECT_EQ(1u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(1u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from other temporary.
Variant<int, InstrumentType<int>> v(TestType<int>(10));
// Assign from empty Variant.
v = Variant<int, InstrumentType<int>>();
EXPECT_EQ(1u, InstrumentType<int>::constructor_count());
EXPECT_EQ(1u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
TestType<int> other(10);
// Construct from other.
Variant<int, InstrumentType<int>> v(other);
EXPECT_EQ(1u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from other temporary.
Variant<int, InstrumentType<int>> v(TestType<int>(0));
TestType<int> other(10);
// Assign from other.
v = other;
EXPECT_EQ(1u, InstrumentType<int>::constructor_count());
EXPECT_EQ(0u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(1u, InstrumentType<int>::copy_assignment_count());
}
{
InstrumentType<int>::clear();
// Construct from temporary, temporary ctor/dtor.
Variant<int, InstrumentType<int>> v(InstrumentType<int>(25));
// Assign EmptyVariant.
v = EmptyVariant{};
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(2u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
EXPECT_EQ(2u, InstrumentType<int>::constructor_count());
EXPECT_EQ(2u, InstrumentType<int>::destructor_count());
EXPECT_EQ(0u, InstrumentType<int>::move_assignment_count());
EXPECT_EQ(0u, InstrumentType<int>::copy_assignment_count());
}
TEST(Variant, MoveConstructor) {
{
std::unique_ptr<int> pointer = std::make_unique<int>(10);
Variant<std::unique_ptr<int>> v(std::move(pointer));
ASSERT_TRUE(v.is<std::unique_ptr<int>>());
EXPECT_TRUE(std::get<std::unique_ptr<int>>(v) != nullptr);
EXPECT_TRUE(pointer == nullptr);
}
{
Variant<std::unique_ptr<int>> a(std::make_unique<int>(10));
Variant<std::unique_ptr<int>> b(std::move(a));
ASSERT_TRUE(a.is<std::unique_ptr<int>>());
ASSERT_TRUE(b.is<std::unique_ptr<int>>());
EXPECT_TRUE(std::get<std::unique_ptr<int>>(a) == nullptr);
EXPECT_TRUE(std::get<std::unique_ptr<int>>(b) != nullptr);
}
}
TEST(Variant, IndexOf) {
Variant<int, bool, float> v1;
EXPECT_EQ(0, v1.index_of<int>());
EXPECT_EQ(1, v1.index_of<bool>());
EXPECT_EQ(2, v1.index_of<float>());
Variant<int, bool, float, int> v2;
EXPECT_EQ(0, v2.index_of<int>());
EXPECT_EQ(1, v2.index_of<bool>());
EXPECT_EQ(2, v2.index_of<float>());
}
struct Visitor {
int int_value = 0;
bool bool_value = false;
float float_value = 0.0;
bool empty_value = false;
void Visit(int value) { int_value = value; }
void Visit(bool value) { bool_value = value; }
void Visit(float value) { float_value = value; }
void Visit(EmptyVariant) { empty_value = true; }
};
TEST(Variant, Visit) {
{
Variant<int, bool, float> v(10);
EXPECT_TRUE(v.is<int>());
Visitor visitor;
v.Visit([&visitor](const auto& value) { visitor.Visit(value); });
EXPECT_EQ(10, visitor.int_value);
visitor = {};
v = true;
v.Visit([&visitor](const auto& value) { visitor.Visit(value); });
EXPECT_EQ(true, visitor.bool_value);
}
{
Variant<int, bool, float> v;
EXPECT_EQ(-1, v.index());
Visitor visitor;
v.Visit([&visitor](const auto& value) { visitor.Visit(value); });
EXPECT_TRUE(visitor.empty_value);
}
{
Variant<std::string> v("test");
ASSERT_TRUE(v.is<std::string>());
EXPECT_FALSE(std::get<std::string>(v).empty());
v.Visit([](auto&& value) {
std::remove_reference_t<decltype(value)> empty;
std::swap(empty, value);
});
ASSERT_TRUE(v.is<std::string>());
EXPECT_TRUE(std::get<std::string>(v).empty());
}
}
TEST(Variant, Become) {
{
Variant<int, bool, float> v;
v.Become(0);
EXPECT_TRUE(v.is<int>());
v.Become(1);
EXPECT_TRUE(v.is<bool>());
v.Become(2);
EXPECT_TRUE(v.is<float>());
v.Become(3);
EXPECT_TRUE(v.empty());
v.Become(-1);
EXPECT_TRUE(v.empty());
v.Become(-2);
EXPECT_TRUE(v.empty());
}
{
Variant<int, bool, float> v;
v.Become(0, 10);
ASSERT_TRUE(v.is<int>());
EXPECT_EQ(10, std::get<int>(v));
v.Become(1, true);
ASSERT_TRUE(v.is<bool>());
EXPECT_EQ(true, std::get<bool>(v));
v.Become(2, 2.0f);
ASSERT_TRUE(v.is<float>());
EXPECT_FLOAT_EQ(2.0f, std::get<float>(v));
v.Become(3, 10);
EXPECT_TRUE(v.empty());
v.Become(-1, 10);
EXPECT_TRUE(v.empty());
v.Become(-2, 20);
EXPECT_TRUE(v.empty());
}
{
Variant<std::string> v;
v.Become(0);
ASSERT_TRUE(v.is<std::string>());
EXPECT_TRUE(std::get<std::string>(v).empty());
}
{
Variant<std::string> v;
v.Become(0, "test");
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("test", std::get<std::string>(v));
}
{
Variant<std::string> v("foo");
v.Become(0, "bar");
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("foo", std::get<std::string>(v));
}
}
TEST(Variant, Swap) {
{
Variant<std::string> a;
Variant<std::string> b;
std::swap(a, b);
EXPECT_TRUE(a.empty());
EXPECT_TRUE(b.empty());
}
{
Variant<std::string> a("1");
Variant<std::string> b;
std::swap(a, b);
EXPECT_TRUE(a.empty());
EXPECT_TRUE(!b.empty());
ASSERT_TRUE(b.is<std::string>());
EXPECT_EQ("1", std::get<std::string>(b));
}
{
Variant<std::string> a;
Variant<std::string> b("1");
std::swap(a, b);
EXPECT_TRUE(!a.empty());
EXPECT_TRUE(b.empty());
ASSERT_TRUE(a.is<std::string>());
EXPECT_EQ("1", std::get<std::string>(a));
}
{
Variant<std::string> a("1");
Variant<std::string> b("2");
std::swap(a, b);
ASSERT_TRUE(a.is<std::string>());
ASSERT_TRUE(b.is<std::string>());
EXPECT_EQ("2", std::get<std::string>(a));
EXPECT_EQ("1", std::get<std::string>(b));
}
{
Variant<int, std::string> a(10);
Variant<int, std::string> b("1");
std::swap(a, b);
ASSERT_TRUE(a.is<std::string>());
ASSERT_TRUE(b.is<int>());
EXPECT_EQ("1", std::get<std::string>(a));
EXPECT_EQ(10, std::get<int>(b));
}
{
Variant<int, std::string> a("1");
Variant<int, std::string> b(10);
std::swap(a, b);
ASSERT_TRUE(a.is<int>());
ASSERT_TRUE(b.is<std::string>());
EXPECT_EQ(10, std::get<int>(a));
EXPECT_EQ("1", std::get<std::string>(b));
}
}
TEST(Variant, Get) {
{
Variant<int, bool, float, int> v;
EXPECT_EQ(nullptr, &std::get<int>(v));
EXPECT_EQ(nullptr, &std::get<bool>(v));
EXPECT_EQ(nullptr, &std::get<float>(v));
EXPECT_EQ(nullptr, &std::get<0>(v));
EXPECT_EQ(nullptr, &std::get<1>(v));
EXPECT_EQ(nullptr, &std::get<2>(v));
EXPECT_EQ(nullptr, &std::get<3>(v));
}
{
Variant<int, bool, float, int> v;
v = 9;
ASSERT_TRUE(v.is<int>())
<< "Expected type " << v.index_of<int>() << " got type " << v.index();
EXPECT_EQ(9, std::get<int>(v));
EXPECT_EQ(9, std::get<0>(v));
std::get<int>(v) = 10;
EXPECT_EQ(10, std::get<int>(v));
EXPECT_EQ(10, std::get<0>(v));
std::get<0>(v) = 11;
EXPECT_EQ(11, std::get<int>(v));
EXPECT_EQ(11, std::get<0>(v));
std::get<3>(v) = 12;
EXPECT_EQ(12, std::get<int>(v));
EXPECT_EQ(12, std::get<3>(v));
}
{
Variant<int, bool, float, int> v;
v = false;
ASSERT_TRUE(v.is<bool>())
<< "Expected type " << v.index_of<bool>() << " got type " << v.index();
EXPECT_EQ(false, std::get<bool>(v));
EXPECT_EQ(false, std::get<1>(v));
std::get<bool>(v) = true;
EXPECT_EQ(true, std::get<bool>(v));
EXPECT_EQ(true, std::get<1>(v));
std::get<bool>(v) = false;
EXPECT_EQ(false, std::get<bool>(v));
EXPECT_EQ(false, std::get<1>(v));
std::get<1>(v) = true;
EXPECT_EQ(true, std::get<bool>(v));
EXPECT_EQ(true, std::get<1>(v));
std::get<1>(v) = false;
EXPECT_EQ(false, std::get<bool>(v));
EXPECT_EQ(false, std::get<1>(v));
}
{
Variant<int, bool, float, int> v;
v = 1.0f;
ASSERT_TRUE(v.is<float>())
<< "Expected type " << v.index_of<float>() << " got type " << v.index();
EXPECT_EQ(2, v.index());
EXPECT_FLOAT_EQ(1.0, std::get<float>(v));
EXPECT_FLOAT_EQ(1.0, std::get<2>(v));
std::get<float>(v) = 1.1;
EXPECT_FLOAT_EQ(1.1, std::get<float>(v));
EXPECT_FLOAT_EQ(1.1, std::get<2>(v));
std::get<float>(v) = -3.0;
EXPECT_FLOAT_EQ(-3.0, std::get<float>(v));
EXPECT_FLOAT_EQ(-3.0, std::get<2>(v));
std::get<2>(v) = 1.1;
EXPECT_FLOAT_EQ(1.1, std::get<float>(v));
EXPECT_FLOAT_EQ(1.1, std::get<2>(v));
std::get<2>(v) = -3.0;
EXPECT_FLOAT_EQ(-3.0, std::get<float>(v));
EXPECT_FLOAT_EQ(-3.0, std::get<2>(v));
}
{
Variant<std::unique_ptr<int>> v(std::make_unique<int>(10));
std::unique_ptr<int> pointer = std::move(std::get<std::unique_ptr<int>>(v));
ASSERT_FALSE(v.empty());
EXPECT_TRUE(pointer != nullptr);
EXPECT_TRUE(std::get<std::unique_ptr<int>>(v) == nullptr);
}
{
Variant<std::string> v("test");
std::string s = std::get<std::string>(std::move(v));
EXPECT_EQ("test", s);
}
}
TEST(Variant, IfAnyOf) {
{
Variant<int, float> v(10);
ASSERT_TRUE(v.is<int>());
bool b = false;
EXPECT_TRUE(IfAnyOf<int>::Get(&v, &b));
EXPECT_TRUE(b);
float f = 0.0f;
EXPECT_TRUE((IfAnyOf<int, float>::Get(&v, &f)));
EXPECT_FLOAT_EQ(10.f, f);
}
{
const Variant<int, float> v(10);
ASSERT_TRUE(v.is<int>());
bool b = false;
EXPECT_TRUE(IfAnyOf<int>::Get(&v, &b));
EXPECT_TRUE(b);
float f = 0.0f;
EXPECT_TRUE((IfAnyOf<int, float>::Get(&v, &f)));
EXPECT_FLOAT_EQ(10.f, f);
}
{
Variant<int, float> v(10);
ASSERT_TRUE(v.is<int>());
bool b = false;
EXPECT_TRUE(IfAnyOf<int>::Call(&v, [&b](const auto& value) { b = value; }));
EXPECT_TRUE(b);
float f = 0.0f;
EXPECT_TRUE((
IfAnyOf<int, float>::Call(&v, [&f](const auto& value) { f = value; })));
EXPECT_FLOAT_EQ(10.f, f);
}
{
Variant<std::unique_ptr<int>, int> v(std::make_unique<int>(10));
ASSERT_TRUE(v.is<std::unique_ptr<int>>());
const int* original_v = std::get<std::unique_ptr<int>>(v).get();
std::unique_ptr<int> u(std::make_unique<int>(20));
EXPECT_TRUE(IfAnyOf<std::unique_ptr<int>>::Take(&v, &u));
ASSERT_TRUE(v.is<std::unique_ptr<int>>());
EXPECT_TRUE(std::get<std::unique_ptr<int>>(v) == nullptr);
EXPECT_EQ(u.get(), original_v);
}
{
Variant<std::unique_ptr<DerivedType>, int> v(
std::make_unique<DerivedType>(10));
ASSERT_TRUE(v.is<std::unique_ptr<DerivedType>>());
const DerivedType* original_v =
std::get<std::unique_ptr<DerivedType>>(v).get();
std::unique_ptr<BaseType> u(std::make_unique<BaseType>(20));
EXPECT_TRUE(IfAnyOf<std::unique_ptr<DerivedType>>::Take(&v, &u));
ASSERT_TRUE(v.is<std::unique_ptr<DerivedType>>());
EXPECT_TRUE(std::get<std::unique_ptr<DerivedType>>(v) == nullptr);
EXPECT_EQ(u.get(), original_v);
}
{
Variant<std::unique_ptr<int>, int> v(std::make_unique<int>(10));
ASSERT_TRUE(v.is<std::unique_ptr<int>>());
const int* original_v = std::get<std::unique_ptr<int>>(v).get();
std::unique_ptr<int> u(std::make_unique<int>(20));
EXPECT_TRUE(IfAnyOf<std::unique_ptr<int>>::Call(
&v, [&u](auto&& value) { u = std::move(value); }));
ASSERT_TRUE(v.is<std::unique_ptr<int>>());
EXPECT_TRUE(std::get<std::unique_ptr<int>>(v) == nullptr);
EXPECT_EQ(u.get(), original_v);
}
{
Variant<int, bool, float> v(true);
ASSERT_TRUE(v.is<bool>());
float f = 0.f;
EXPECT_FALSE((IfAnyOf<int, float>::Get(&v, &f)));
EXPECT_FLOAT_EQ(0.f, f);
}
{
Variant<std::string, int> v("foo");
ASSERT_TRUE(v.is<std::string>());
std::string s = "bar";
EXPECT_TRUE(IfAnyOf<std::string>::Swap(&v, &s));
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("bar", std::get<std::string>(v));
EXPECT_EQ("foo", s);
}
{
Variant<std::string, const char*> v(static_cast<const char*>("foo"));
ASSERT_TRUE(v.is<const char*>());
std::string s = "bar";
EXPECT_TRUE((IfAnyOf<std::string, const char*>::Take(&v, &s)));
ASSERT_TRUE(v.is<const char*>());
EXPECT_EQ("foo", std::get<const char*>(v));
EXPECT_EQ("foo", s);
v = std::string("bar");
ASSERT_TRUE(v.is<std::string>());
EXPECT_TRUE((IfAnyOf<std::string, const char*>::Take(&v, &s)));
ASSERT_TRUE(v.is<std::string>());
EXPECT_EQ("bar", s);
}
{
Variant<std::string, const char*> v;
ASSERT_TRUE(v.empty());
std::string s = "bar";
EXPECT_FALSE((IfAnyOf<std::string, const char*>::Take(&v, &s)));
EXPECT_EQ("bar", s);
}
{
Variant<std::string, const char*> v(static_cast<const char*>("test"));
ASSERT_TRUE(v.is<const char*>());
std::string s;
EXPECT_FALSE(IfAnyOf<>::Take(&v, &s));
EXPECT_TRUE(s.empty());
}
}
TEST(Variant, ConstVolatile) {
{
Variant<const int> v(10);
ASSERT_TRUE(v.is<const int>());
EXPECT_EQ(10, std::get<const int>(v));
}
{
Variant<const std::string> v("test");
ASSERT_TRUE(v.is<const std::string>());
EXPECT_EQ("test", std::get<const std::string>(v));
}
{
Variant<volatile int, std::string> v(10);
ASSERT_TRUE(v.is<volatile int>());
EXPECT_EQ(10, std::get<volatile int>(v));
}
}
TEST(Variant, HasType) {
EXPECT_TRUE((detail::HasType<int, int, float, bool>::value));
EXPECT_FALSE((detail::HasType<char, int, float, bool>::value));
EXPECT_FALSE(detail::HasType<>::value);
EXPECT_TRUE((detail::HasType<int&, int, float, bool>::value));
EXPECT_FALSE((detail::HasType<char&, int, float, bool>::value));
}
TEST(Variant, IsConstructible) {
using ArrayType = const float[3];
struct ImplicitBool {
// NOLINTNEXTLINE(google-explicit-constructor)
operator bool() const { return true; }
};
struct ExplicitBool {
explicit operator bool() const { return true; }
};
struct NonBool {};
struct TwoArgs {
TwoArgs(int, bool) {}
};
EXPECT_FALSE((detail::IsConstructible<bool, ArrayType>::value));
EXPECT_TRUE((detail::IsConstructible<bool, int>::value));
EXPECT_TRUE((detail::IsConstructible<bool, ImplicitBool>::value));
EXPECT_TRUE((detail::IsConstructible<bool, ExplicitBool>::value));
EXPECT_FALSE((detail::IsConstructible<bool, NonBool>::value));
EXPECT_TRUE((detail::IsConstructible<TwoArgs, int, bool>::value));
EXPECT_FALSE((detail::IsConstructible<TwoArgs, int, std::string>::value));
EXPECT_FALSE((detail::IsConstructible<TwoArgs, int>::value));
}
TEST(Variant, Set) {
EXPECT_TRUE((detail::Set<int, bool, float>::template IsSubset<int, bool,
float>::value));
EXPECT_TRUE(
(detail::Set<int, bool, float>::template IsSubset<bool, float>::value));
EXPECT_TRUE((detail::Set<int, bool, float>::template IsSubset<float>::value));
EXPECT_TRUE((detail::Set<int, bool, float>::template IsSubset<>::value));
EXPECT_FALSE(
(detail::Set<int, bool, float>::template IsSubset<int, bool, float,
char>::value));
EXPECT_FALSE((detail::Set<int, bool, float>::template IsSubset<bool, float,
char>::value));
EXPECT_FALSE(
(detail::Set<int, bool, float>::template IsSubset<float, char>::value));
EXPECT_FALSE((detail::Set<int, bool, float>::template IsSubset<char>::value));
EXPECT_TRUE(detail::Set<>::template IsSubset<>::value);
EXPECT_FALSE(detail::Set<>::template IsSubset<int>::value);
EXPECT_FALSE((detail::Set<>::template IsSubset<int, float>::value));
}