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 DEFAULTONLY_H
10 #define DEFAULTONLY_H
11 
12 #include <cassert>
13 
14 class DefaultOnly
15 {
16     int data_;
17 
18     DefaultOnly(const DefaultOnly&);
19     DefaultOnly& operator=(const DefaultOnly&);
20 public:
21     static int count;
22 
DefaultOnly()23     DefaultOnly() : data_(-1) {++count;}
~DefaultOnly()24     ~DefaultOnly() {data_ = 0; --count;}
25 
26     friend bool operator==(const DefaultOnly& x, const DefaultOnly& y)
27         {return x.data_ == y.data_;}
28     friend bool operator< (const DefaultOnly& x, const DefaultOnly& y)
29         {return x.data_ < y.data_;}
30 };
31 
32 int DefaultOnly::count = 0;
33 
34 #endif  // DEFAULTONLY_H
35