35 lines · c
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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef DEFAULTONLY_H10#define DEFAULTONLY_H11 12#include <cassert>13 14class DefaultOnly15{16 int data_;17 18 DefaultOnly(const DefaultOnly&);19 DefaultOnly& operator=(const DefaultOnly&);20public:21 static int count;22 23 DefaultOnly() : data_(-1) {++count;}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 32int DefaultOnly::count = 0;33 34#endif // DEFAULTONLY_H35