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