Add DaydreamVR native libraries and services
Upstreaming the main VR system components from master-dreamos-dev
into goog/master.
Bug: None
Test: `m -j32` succeeds. Sailfish boots and basic_vr sample app works
Change-Id: I853015872afc443aecee10411ef2d6b79184d051
diff --git a/libs/vr/libpdx/variant_tests.cpp b/libs/vr/libpdx/variant_tests.cpp
new file mode 100644
index 0000000..c30c055
--- /dev/null
+++ b/libs/vr/libpdx/variant_tests.cpp
@@ -0,0 +1,1087 @@
+#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 {
+ BaseType(int value) : value(value) {}
+ int value;
+};
+
+struct DerivedType : BaseType {
+ DerivedType(int value) : BaseType{value} {};
+};
+
+template <typename T>
+class TestType {
+ public:
+ TestType(const T& value) : value_(value) {}
+ 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:
+ InstrumentType(const T& value) : value_(value) { constructor_count_++; }
+ 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_++;
+ }
+ InstrumentType(const TestType<T>& other) : value_(other.get()) {
+ constructor_count_++;
+ }
+ 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<bool> b(true);
+ Variant<int, bool, float> v(b.take());
+ 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());
+ }
+}
+
+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::HasTypeIgnoreRef<int&, int, float, bool>::value));
+ EXPECT_FALSE((detail::HasTypeIgnoreRef<char&, int, float, bool>::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));
+}