Prototype of a class that inherits from a template class in virtual public mode

Question

The prototype class of this:

template <typename T>

class MyClass

{};

is simply:

template <typename T>

class MyClass;

But what's the prototype of this class:

template <typename T>

class MyDerivedClass : public virtual MyBaseClass<T>

{};

If I just remove the

{}

, I get an error:

expected '{' before ';' token

Is this even possible? I'm using gcc 6.2.1 on Debian Stretch.

Answer 1

The inheritance specifier is part of a class's definition, not its declaration.

You can of course still declare the class, just not its inheritance relationship:

template <typename T>
class MyDerivedClass;

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