Partial specialization syntax should not be used for function templates

Class templates can be explicitly or partially specialized. But according to the C++ standard, function templates cannot be partially specialized. Under certain conditions, the Microsoft® compiler will silently ignore the confusing application of partial specialization syntax to a function, but other compilers will raise an error for it and fail compilation.

Noncompliant Code Example

template<typename T>
void fun(T p);

template<typename T>
void fun<T>(T p) { // Noncompliant
  // ...
}

Compliant Solution

template<typename T>
void fun(T p);

template<typename T>
void fun(T p) {
  // ...
}