Use of 'const' for function parameters

Question

How far do you go with const? Do you just make functions const when necessary or do you go the whole hog and use it everywhere? For example, imag

Answer 1

If you use the ->* or .* operators, it's a must.

It prevents you from writing something like

void foo(Bar *p) { if (++p->*member > 0) { ... } }

which I almost did right now, and which probably doesn't do what you intend.

What I intended to say was

void foo(Bar *p) { if (++(p->*member) > 0) { ... } }

and if I had put a const in between Bar * and p, the compiler would have told me that.