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#include <mbgl/test/util.hpp>
#include <mbgl/util/unique_any.hpp>
using namespace mbgl::util;
class TestType {
public:
TestType() : i1(0), i2(1) {
str[0] = 'a';
}
TestType(unique_any& p) : TestType() {
p = std::unique_ptr<TestType>(this);
}
//Detect moves
TestType(TestType&& t): i1(t.i1+1), i2(t.i2+2) {
str[0] = t.str[0]+1;
}
int i1;
int i2;
char str[256];
};
bool IsStackAllocated (const unique_any& a, const void* obj1) {
uintptr_t a_ptr = (uintptr_t)(&a);
uintptr_t obj = (uintptr_t)(obj1);
return (obj >= a_ptr && obj < a_ptr + sizeof(unique_any));
};
TEST(UniqueAny, Empty) {
EXPECT_FALSE(unique_any().has_value());
EXPECT_TRUE(unique_any().type() == typeid(void));
EXPECT_THROW(any_cast<int>(unique_any()), bad_any_cast);
}
TEST(UniqueAny, BasicTypes) {
unique_any i = 3;
EXPECT_TRUE(i.has_value());
EXPECT_TRUE(i.type() == typeid(int));
EXPECT_TRUE(IsStackAllocated(i, any_cast<int>(&i)));
auto iValue = any_cast<int>(i);
EXPECT_TRUE(iValue == 3);
EXPECT_TRUE(unique_any(4).has_value());
EXPECT_TRUE(unique_any(4).type() == typeid(int));
unique_any f = 6.2f;
EXPECT_TRUE(f.has_value());
EXPECT_TRUE(f.type() == typeid(float));
EXPECT_TRUE(IsStackAllocated(f, any_cast<float>(&f)));
const float fValue = any_cast<const float>(f);
EXPECT_TRUE(fValue == 6.2f);
EXPECT_TRUE(unique_any(1.0f).has_value());
EXPECT_TRUE(unique_any(1.0f).type() == typeid(float));
unique_any c = 'z';
EXPECT_TRUE(c.has_value());
EXPECT_TRUE(c.type() == typeid(char));
EXPECT_TRUE(IsStackAllocated(c, any_cast<char>(&c)));
EXPECT_THROW(any_cast<float>(c), bad_any_cast);
EXPECT_TRUE(unique_any('4').has_value());
EXPECT_TRUE(unique_any('4').type() == typeid(char));
}
TEST(UniqueAny, BasicTypes_Move) {
unique_any i = 3;
EXPECT_TRUE(i.has_value());
EXPECT_TRUE(i.type() == typeid(int));
unique_any f = 6.2f;
EXPECT_TRUE(f.has_value());
EXPECT_TRUE(f.type() == typeid(float));
f = std::move(i);
EXPECT_FALSE(i.has_value());
EXPECT_TRUE(i.type() == typeid(void));
EXPECT_TRUE(f.has_value());
EXPECT_TRUE(f.type() == typeid(int));
}
TEST(UniqueAny, LargeType) {
TestType t1;
unique_any u1 = unique_any(std::move(t1));
EXPECT_TRUE(u1.has_value());
EXPECT_TRUE(u1.type() == typeid(TestType));
EXPECT_FALSE(IsStackAllocated(u1, any_cast<TestType>(&u1)));
//TestType should be moved into owning unique_any
EXPECT_EQ(any_cast<TestType>(&u1)->i1, 1);
auto u2(std::move(u1));
EXPECT_TRUE(u2.type() == typeid(TestType));
EXPECT_TRUE(u1.type() == typeid(void));
//TestType should not be moved when owning unique_any is moved;
EXPECT_EQ(any_cast<TestType>(&u2)->i1, 1);
//TestType should be moved out of owning unique_any
// Note: two moves are involved in returning the moved value
// First out of the unique_any, and then in the return statement
auto t2 = any_cast<TestType>(std::move(u2));
EXPECT_EQ(t2.i1, 3);
EXPECT_TRUE(u2.type() == typeid(void));
}
TEST(UniqueAny, Pointer) {
auto t1 = new TestType();
auto u1 = unique_any(std::move(t1));
EXPECT_TRUE(u1.has_value());
EXPECT_TRUE(u1.type() == typeid(TestType *));
EXPECT_TRUE(IsStackAllocated(u1, any_cast<TestType *>(&u1)));
//Only the pointer should be moved
TestType * t2 = *any_cast<TestType *>(&u1);
EXPECT_EQ(t2->i1, 0);
unique_any u2(4);
std::swap(u2, u1);
EXPECT_TRUE(u1.has_value());
EXPECT_TRUE(u1.type() == typeid(int));
EXPECT_TRUE(u2.has_value());
EXPECT_TRUE(u2.type() == typeid(TestType *));
t2 = *any_cast<TestType *>(&u2);
EXPECT_EQ(t2->i1, 0);
delete t2;
}
TEST(UniqueAny, UniquePtr) {
auto t1 = std::make_unique<TestType>();
auto u1 = unique_any(std::move(t1));
EXPECT_EQ(t1.get(), nullptr);
EXPECT_TRUE(u1.has_value());
EXPECT_TRUE(u1.type() == typeid(std::unique_ptr<TestType>));
EXPECT_TRUE(IsStackAllocated(u1, any_cast<std::unique_ptr<TestType>>(&u1)));
auto t2 = any_cast<std::unique_ptr<TestType> >(std::move(u1));
EXPECT_FALSE(u1.has_value());
unique_any u2;
TestType * t3 = new TestType();
u2 = std::unique_ptr<TestType>(t3);
EXPECT_TRUE(u2.has_value());
EXPECT_TRUE(any_cast<std::unique_ptr<TestType>>(&u2)->get() == t3);
}
TEST(UniqueAny, SharedPtr) {
std::shared_ptr<int> shared(new int(3));
std::weak_ptr<int> weak = shared;
unique_any u1 = 0;
EXPECT_THROW(any_cast<float>(u1), bad_any_cast);
EXPECT_EQ(weak.use_count(), 1);
unique_any u2 = shared;
EXPECT_EQ(weak.use_count(), 2);
EXPECT_EQ(any_cast<std::unique_ptr<int>>(&u1), nullptr);
EXPECT_FALSE(IsStackAllocated(u1, any_cast<std::shared_ptr<TestType>>(&u1)));
u1 = std::move(u2);
EXPECT_EQ(weak.use_count(), 2);
u2.swap(u1);
EXPECT_EQ(weak.use_count(), 2);
u2 = 0;
EXPECT_EQ(weak.use_count(), 1);
shared = nullptr;
EXPECT_EQ(weak.use_count(), 0);
}
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