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C++ Template Specialization and Subclassing


By : JiaHong
Date : October 18 2020, 06:10 PM
This might help you The probelm is, the primary template is an exact match when T being deduced as B; it's a better match than the specialization.
You can use template overloading instead; with SFINAE.
code :
template <typename T>
std::enable_if_t<!std::is_base_of_v<A, T>> foo(const T& t) {
  printf("T");
}

template <typename T>
std::enable_if_t<std::is_base_of_v<A, T>> foo(const T& t) {
  printf("A");
}


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Explicit template specialization cannot have a storage class - member method specialization


By : user3323424
Date : March 29 2020, 07:55 AM
it should still fix some issue Say I have the following code in Visual Studio ,
Any suggestions on how I can make the last method static?
code :
struct foo {
  template<typename T>
  void bar() {}

  template<typename T>
  static void baz() {}
};

int main() {
  foo f;
  f.template bar<void>();
  foo::baz<void>();
}

Nested class template full specialization versus partial specialization


By : HexxCube
Date : March 29 2020, 07:55 AM
it helps some times This is an XY problem. You have to simply move it outwards.
code :
template < >
struct Apply::Inheritance< >
{

};

Explicit function template specialization picks the wrong specialization


By : Javier Guerrero
Date : March 29 2020, 07:55 AM
To fix the issue you can do I have 2 functions inside a class, one is the default specilization of the operator+= which expects a function of some sort, whilst the second specilization expects an EventHandler, here is the implementation: , To properly specialize, just use
code :
template<>
timed_function<_Sig>& operator+=<const EventHandler<_Sig>>...

template subclassing with partial specialization


By : Pat
Date : March 29 2020, 07:55 AM
will be helpful for those in need Consider the following , Try this:
code :
template<std::size_t dim>
using foo =  typename derived<dim>::type;
//usage
foo<n> bar;

undefined reference to full template specialization class member function, but not partial specialization


By : Komal
Date : March 29 2020, 07:55 AM
This might help you You have to declare partial and explicit specializations in every translation unit that uses them (before any use that would implicitly instantiate that specialization). Here, that would look like
code :
template<class T> class A<T,int>;
template<> class A<int,int>;
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