1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef AB_H
10 #define AB_H
11 
12 #include <cassert>
13 
14 class A
15 {
16     int id_;
17 public:
A(int id)18     explicit A(int id) : id_(id) {++count;}
A(const A & a)19     A(const A& a) : id_(a.id_) {++count;}
~A()20     virtual ~A() {assert(id_ >= 0); id_ = -1; --count;}
21 
22     static int count;
23 };
24 
25 int A::count = 0;
26 
27 class B
28     : public A
29 {
30 public:
B(int id)31     explicit B(int id) : A(id) {++count;}
B(const B & a)32     B(const B& a) : A(a) {++count;}
~B()33     virtual ~B() {--count;}
34 
35     static int count;
36 };
37 
38 int B::count = 0;
39 
40 #endif  // AB_H
41