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yo/advancedtemplates/overloaded.yo

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    Template meta programming comes to the rescue. Knowing that class template

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member functions are only instantiated when used, our plan is to design

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overloaded tt(add) member functions of which only one will be called (and thus

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instantiated). Our selection will be based on an additional (in addition to

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tt(Type) itself) template non-type parameter that indicates whether we'll use

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tt(Storage) for polymorphic or non-polymorphic classes. Our class tt(Storage)

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starts like this:

 

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overloaded tt(add) member functions of which only one is going to be called

 

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(and thus instantiated). Our selection will be based on an additional (in

 

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addition to tt(Type) itself) template non-type parameter that indicates

 

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whether we'll use tt(Storage) for polymorphic or non-polymorphic classes. Our

 

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class tt(Storage) starts like this:

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        verb(

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    template <typename Type, bool isPolymorphic>

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    class Storage

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