function that takes only literal integers

Question

I\'m looking for a way to simulate certain overloaded GCC built-ins in C++. The built-ins are similar to these:

__builtin_foo(char *a, signed int b);
__buil         


        

Answer 1

You could turn the function into a template:

template 
builtin_foo(char *a);

The call syntax would then be builtin_foo<1>(whatever).

If you don't like this, you could wrap the template in a macro:

#define m_builtin_foo(a, b) builtin_foo<(b)>((a))

This will of course accept any integral constant expression, not just a literal.