Class Base

tests/unit_test/sk_unique_ptr_test.cpp:203–206

// 19. Polymorphic — base unique_ptr managing derived
TEST_F(UniquePtrTest, Polymorphic) {
  struct Base {
    virtual ~Base() = default;
    virtual auto GetValue() -> int { return 0; }
  };
  struct Derived : Base {
    int val;
    explicit Derived(int v) : val(v) {}