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c++shared-ptr

Is the std::shared_ptr the same as adding "SharedPtr" to the name of a class when declaring a variable?

I encountered a somewhat odd "shared pointer" usage. As far as I know, shared pointers are written out as

std::shared_ptr<void()> pointy(fun, del);

However, I have a case where I have an interface IGenericResult (which all different result-classes implement). I found a place where it simply has "SharedPtr" added to the end of the name. Like this;

IGenericResultSharedPtr result = databasePointer->getLatestResult();
result->getTimestamp();   // Example of usage

It doesn't seem as if there is any defined class/interface/header/anything named IGenericResultSharedPtr so I can only assume it's something built into C++ (currently using version C++11 I think).

Is this the same thing as the std::shared_ptr (and if it is, how would I declare it in the std syntax)? If it's not the same thing, what differences are there?

Solution

  • There is no such thing as "if the type name is XYZSharedPtr, it is instead std::shared_ptr<XYZ>" inbuilt into C++.

    The authors of the code created a type alias somewhere, either

    using IGenericResultSharedPtr = std::shared_ptr<IGenericResult>;

    or

    typedef std::shared_ptr<IGenericResult> IGenericResultSharedPtr;

    (or possibly wrapped in a macro - who knows). Ask your IDE to find the definition :)