Top-level const doesn't influence a function signature

Question

From the C++ Primer 5th Edition, it says:

int f(int){ /* can write to parameter */}
int f(const int){ /* cannot write to parameter */}

The

Answer 1

I think the indistinguishable is used in the terms of overloading and compiler, not in terms if they can be distinguished by caller.

Compiler does not distinguish between those two functions, their names are mangled in the same way. That leads to situation when compiler treats those two declarations as redefinition.