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Singleton in Design Pattern

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Jian Ma

Posts: 1
Nickname: jianma
Registered: Mar, 2011

Singleton in Design Pattern Posted: Mar 17, 2011 12:37 PM
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Hi,

I read the Singleton in the book << Design Patterns - Elements of Reusable Object-Oriented Software>>.

The Singleton class is define as :
class Singleton {
public:
static Singleton* Instance();
protect:
Singleton();
private:
static Singleton* _instance;
};

My question is why it uses protected constructor instead of private. Does it care about inheritance?

Any suggestion is welcomed.

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