Class Constructable

dnn/test/common/small_vector.cpp:34–141

A helper class that counts the total number of constructor and destructor calls.

/// A helper class that counts the total number of constructor and
/// destructor calls.
class Constructable {
private:
    static int num_constructor_calls;
    static int num_move_constructor_calls;
    static int num_copy_constructor_calls;
    static int num_deconstructor_calls;
    static int num_assignment_calls;
    static int num_move_assignment_calls;
    static int num_copy_assignment_calls;

    static std::unordered_set<const Constructable*> destroyed_mem;

    bool m_constructed;
    int m_value;

    int m_id;

public:
    Constructable() : m_constructed(true), m_value(0) {
        ++num_constructor_calls;
        m_id = num_constructor_calls;
        destroyed_mem.erase(this);
    }

    Constructable(int val) : m_constructed(true), m_value(val) {
        ++num_constructor_calls;
        m_id = num_constructor_calls;
        destroyed_mem.erase(this);
    }

    Constructable(const Constructable& src) : m_constructed(true) {
        m_value = src.m_value;
        ++num_constructor_calls;
        m_id = num_constructor_calls;
        EXPECT_TRUE(destroyed_mem.find(&src) == destroyed_mem.end());
        destroyed_mem.erase(this);
    }

    Constructable(Constructable&& src) : m_constructed(true) {
        m_value = src.m_value;
        ++num_constructor_calls;
        ++num_move_constructor_calls;
        m_id = num_constructor_calls;
        EXPECT_TRUE(destroyed_mem.find(&src) == destroyed_mem.end());
        destroyed_mem.erase(this);
    }

    ~Constructable() {
        EXPECT_TRUE(m_constructed);
        ++num_deconstructor_calls;
        m_constructed = false;
        destroyed_mem.insert(this);
    }

    Constructable& operator=(const Constructable& src) {
        EXPECT_TRUE(m_constructed);
        m_value = src.m_value;
        ++num_assignment_calls;