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Fiona-J-W/gist:5834452

Forked from anonymous/gist:5834419
Last active December 18, 2015 19:39
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gistfile1.cpp
template<Strategy>
class Algorithm {
friend class ConcreteStrategy;
public:
Algorithm(ConcreteStrategy strategy) : strategy{strategy} {
strategy.set_algorithm(this);
}
void onEvent(Event x) {
this->strategy.onEvent(x);
}
protected:
ConcreteStrategy strategy;
std::vector<int> data;
};
/// /////////////////////////////////
class ConcreteStrategy {
friend class Algorithm<ConcreteStrategy>;
void set_algorithm(Algorithm<ConcreteStrategy>* algo){this->algo = algo;}
public:
ConcreteStrategy() : algo{nullptr} {}
void onEvent(Event x) {
this->algo->data[...] = ...
}
private:
Algorithm<ConcreteStrategy> * algo;
};
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