CodeyZ-sec-pr

src/群友提交/第04题/CodeyZ.cpp

@@ -0,0 +1,31 @@
+#include<iostream>
+class ComponentBase {
+protected:
+    static inline std::size_t component_type_count = 0;
+};
+template<typename T>
+class Component : public ComponentBase {
+
+public:
+    static std::size_t component_type_id() {
+        static std::size_t id = component_type_count++;
+        return id;
+    }
+
+};
+class A : public Component<A>
+{};
+class B : public Component<B>
+{};
+class C : public Component<C>
+{};
+int main()
+{
+    std::cout << A::component_type_id() << std::endl;
+    std::cout << B::component_type_id() << std::endl;
+    std::cout << B::component_type_id() << std::endl;
+    std::cout << A::component_type_id() << std::endl;
+    std::cout << A::component_type_id() << std::endl;
+    std::cout << C::component_type_id() << std::endl;
+
+}