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Can a class member function template be virtual?


Can a class member function template be virtual?

By : The Dorf
Date : October 20 2020, 11:12 AM
fixed the issue. Will look into that further Templates are all about the compiler generating code at compile-time. Virtual functions are all about the run-time system figuring out which function to call at run-time.
Once the run-time system figured out it would need to call a templatized virtual function, compilation is all done and the compiler cannot generate the appropriate instance anymore. Therefore you cannot have virtual member function templates.
code :


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Calling a virtual member function from inside the (template) base class

Calling a virtual member function from inside the (template) base class


By : vasanthapriyan
Date : March 29 2020, 07:55 AM
it fixes the issue
However, I'm getting a compiler error saying that I can't initialize a string to -1.0, which means that the compiler is trying to call base::get() when I call d.print().
Inlining causes specialized member function of template class overriding virtual functions to get overlooked

Inlining causes specialized member function of template class overriding virtual functions to get overlooked


By : Abdelhak Errami
Date : March 29 2020, 07:55 AM
it helps some times I speculate that you have an ODR problem, so there is little sense in guessing why some compiler optimization behaves differently from another compiler setting.
In essence, the One Definition Rule states that the same entity should have the exact same definition throughout an application, otherwise the effects are undefined.
code :
// my_template.hpp
#include "my_template_fwd.hpp"
#include "my_template_primary.hpp"
#include "my_template_spec_some_type.hpp" 

// my_template_fwd.hpp
template<typename> class my_template; // forward declaration of the primary template

// my_template_primary.hpp
#include "my_template_fwd.hpp"
template<typename T> class my_template { /* full definition */ };

// my_template_spec_some_type.hpp
#include "my_template_fwd.hpp"
template<> class my_template<some_type> { /* full definition */ };

// some_client_module.hpp
#include "my_template.hpp" // no ODR possible, compiler will always see unique definition
Can a virtual member function definition appear outside the class template?

Can a virtual member function definition appear outside the class template?


By : SHERRY
Date : March 29 2020, 07:55 AM
wish help you to fix your issue This issue is not related to templates.
You simply shouldn't use the virtual keyword in an out-of-class definition of a member function:
code :
template <typename T> void A<T>::do_something() {
    std::cout << "Saluton, mondo!\n";
}
Is this explicit template function specialization of a member template of a member template of a class template valid?

Is this explicit template function specialization of a member template of a member template of a class template valid?


By : PRAFFUL BHOSALE
Date : March 29 2020, 07:55 AM
I wish this helpful for you I don't believe it is valid. I'm not deep enough in the language to tell you how/if you can do this without providing the top-level specialization as done below, or if there is a shortcut for skipping the replicate templates, but the error message is fairly clear: You're trying to provide an implementation of a static member of a dependent nested type without providing the specialization of the actual dependency. I.e. this works:
Accessing template member functions of template class through pointer to virtual base class?

Accessing template member functions of template class through pointer to virtual base class?


By : Darshan Simha
Date : March 29 2020, 07:55 AM
hop of those help? I've found an answer using the Curiously Recurring Template Pattern (CRTP), explained here by Eli Bendersky.
It requires adding another layer of template class:
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