mirror of
https://github.com/golang/go
synced 2024-11-22 21:30:02 -07:00
25 lines
597 B
C
25 lines
597 B
C
|
// Copyright 2011 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
class Callback {
|
||
|
|
public:
|
||
|
|
virtual ~Callback() { }
|
||
|
|
virtual std::string run() { return "Callback::run"; }
|
||
|
|
};
|
||
|
|
|
||
|
|
class Caller {
|
||
|
|
private:
|
||
|
|
Callback *callback_;
|
||
|
|
public:
|
||
|
|
Caller(): callback_(0) { }
|
||
|
|
~Caller() { delCallback(); }
|
||
|
|
void delCallback() { delete callback_; callback_ = 0; }
|
||
|
|
void setCallback(Callback *cb) { delCallback(); callback_ = cb; }
|
||
|
|
std::string call() {
|
||
|
|
if (callback_ != 0)
|
||
|
|
return callback_->run();
|
||
|
|
return "";
|
||
|
|
}
|
||
|
|
};
|