decorator example

examples/decorator.cpp

@@ -0,0 +1,43 @@
+#include <tuple>
+#include <iostream>
+#include <utility>
+#include <vector>
+#include <array>
+#include <iostream>
+#include <memory>
+#include <cassert>
+
+#include "fmt/format.h"
+#include "fmt/ranges.h"
+
+// ---------------------------------------------------------------------------
+template<typename F>
+auto stars(F& func) {
+  return [func](auto&&... args) {
+    std::cout << "*******" << std::endl;
+    // Faire avec type de retour !!
+    func(std::forward<decltype(args)>(args)...);
+    std::cout << "\n*******" << std::endl;
+  };
+}
+
+// ---------------------------------------------------------------------------
+void hello_impl() {
+   std::cout << "hello, world!";
+}
+
+// ---------------------------------------------------------------------------
+int get_impl(int i) {
+  return i;
+}
+// ---------------------------------------------------------------------------
+auto hello       = stars(hello_impl);
+auto super_get   = stars(get_impl);
+
+// ===========================================================================
+int main(void)
+{
+  hello();
+  // int ci = super_get(10);
+  // assert(ci == 10);
+}