How to Correctly Explicitly Instantiate a Template Function in C ?

Explicit Template Function Instantiation

In template programming, you may encounter the need to instantiate a template function explicitly, without invoking it. The following section addresses this specific scenario.

Question:

I have a template function and I want to instantiate it explicitly. However, when I attempted to do so using the following syntax:

template int function_name<int>(int);

I received errors. What am I doing wrong?

Answer:

The snippet you provided contains a syntax error. This should be corrected with the following syntax:

template void function_name<int>(int);

Clarification:

Note that explicit instantiation and template specialization are different concepts. Explicit instantiation involves creating an instance of a template function for a specific type without calling it. Template specialization, on the other hand, involves creating a tailored implementation for a specific type. The syntax for template specialization differs from explicit instantiation:

template <> void function_name<int>(int param) {}

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