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Greg K

static keyword

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I am using a static variable log of type class FileLog. FileLog is a basic class that logs text to a file. I want one log for all my instances of type Object. class Object { public: static void createLog() {log.create("LogObject.txt");} static void destroyLog() {log.destroy();} private: static class FileLog log; }; I figure I should then be able to call: Object::createLog(); Object::destroyLog(); from the main program and inside Object I would be able to access log to output messages. This does not work. It gives me this error: : error LNK2001: unresolved external symbol "protected: static class FileLog Object::log" (?log@Object@@1VFileLog@@A) : fatal error LNK1120: 1 unresolved externals Can anyone help me? -Greg Koreman

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In exactly one source file you need to put the line:

FileLog Object::log;

This will create the storage for the log class.

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Off topic (this doesn't apply to original post, so there is no confusion), but it gets so much more complicated when you have a templated class with a template static member with a constructor that takes parameters. Whew. Basically...

template <class T> std::map<std::string, T> TManager<T>::m_map(T::CompFunctor);

instead of a simple

FileLog object::log;


Yes, I know, I probably should look into a redesign.

EDIT: Damn < and > with HTML!

[edited by - Neosmyle on November 5, 2002 12:40:07 AM]

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