centralized performance resources

perf-cpp/scripts/enum-class-quiz.cc

@@ -0,0 +1,50 @@
+#include <iostream>
+
+struct Counter {
+    inline static int x = 1;
+    static void bump() { ++x; }
+};
+
+struct Counter2 : Counter {
+    inline static int x = 100;
+    static void bump() { x += 10; }
+};
+
+enum E { A = 1, B = 2 };
+
+struct S {
+    enum E { B = 3, C = 4 };
+    static int f() { return B; }
+};
+
+enum class M : unsigned char { A = 250, B, C };
+
+int g() {
+    int B = 40;
+    return S::f() + B;
+}
+
+int main() {
+    Counter::bump();
+    Counter2::bump();
+
+    // 112
+    int t1 = Counter::x + Counter2::x;
+
+    // 43
+    int u1 = g();
+
+    int B = 7;
+    // 9
+    int t2 = B + ::B;
+
+    int d;
+    {
+        using enum M;
+        // 251 - 250 = 1?
+        d = static_cast<int>(B) - static_cast<int>(A);
+    }
+
+    std::cout << t1 << " " << u1 << " " << t2 << " " << d << "\n";
+}
+