Member Function of Templated Class Invocation from Templated Function

In the provided code snippet, invoking a member function template from within another template results in a compilation error. Specifically, the code attempts to call A::f() from within g(). However, this fails due to a syntax issue.

To resolve this, the template keyword must be explicitly specified before the member function invocation. This is because according to the C '03 Standard 14.2/4, when the name of a member template specialization appears after a postfix-expression or qualified-id that depends on a template parameter, the member template name must be prefixed with the template keyword.

Therefore, the following code is correct:

template void g()
{
   A a;
   a.template f();  // Explicitly specify 'template' keyword
}

By adding the template keyword, the compiler can correctly identify that f is a member template of the A class template, and it can successfully call A::f().