If the initial object itself isn't const, then merely declaring the function parameter as a pointer to const won't guarantee that some other thread of execution won't change the value under your nose. Or if you have multiple pointer parameters, they can alias each other.
Indirection in C and C++ is a mess, but at least C has the "restrict" keyword. Best to program with value types whenever you can, and use pointers and references when you must.
Indirection in C and C++ is a mess, but at least C has the "restrict" keyword. Best to program with value types whenever you can, and use pointers and references when you must.