How Do I Explicitly Specialize Class Template Member Functions in C ?

Explicitly Specializing Class Template Member Functions

C allows for the explicit specialization of class template member functions to provide different implementations for specific types. To define an explicit specialization for a class template member function, follow these steps:

1. Surround the Class Template with Specialization

When specializing a member function of a class template, it is necessary to also specialize the surrounding class template. This ensures that the member function is only specialized for the specific class template it is intended for.

2. Explicitly Specialize the Member Function

Declare the explicitly specialized member function as follows:

template <>
Type Class<Type>::MemberFunction() { ... }

In this declaration, Type represents the specific type for which the member function is being specialized.

Example

Consider the following class template with a member function:

template <class C>
class X {
public:
    template <class T>
    void get_as();
};

To specialize the get_as member function for double type, you would need to write:

template <>
template <>
void X<int>::get_as<double>() { ... }

Note: Explicit specialization of member functions only affects the specific member function and its type parameters. The other member functions and the surrounding class template remain unchanged.

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