add object lifetime example

.gitignore

@@ -11,3 +11,4 @@ unique_ptr
 list-initializers
 array-bounds
 accumulate
+object-lifetime

CMakeLists.txt

@@ -11,3 +11,4 @@ add_executable(unique_ptr unique_ptr.cpp)
 add_executable(list-initializers list-initializers.cpp)
 add_executable(array-bounds array-bounds.cpp)
 add_executable(accumulate accumulate.cpp)
+add_executable(object-lifetime object-lifetime.cpp)

object-lifetime.cpp

@@ -0,0 +1,25 @@
+#include <cstdio>
+
+struct A {
+   A() { puts("A()"); }
+  ~A() { puts("~A()"); }
+};
+
+struct B {
+   B() { puts("B()"); }
+  ~B() { puts("~B()"); }
+};
+
+struct C {
+  A a;
+  B b;
+
+   C() { puts("C()"); }
+  ~C() { puts("~C()"); }
+};
+
+int main() {
+  C c;
+  // Destructors should be called in exactly the opposite order of the
+  // constructor calls.
+}