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

To summarize:

• "Normally const pass-by-value is unuseful and misleading at best." From GOTW006
• But you can add them in the .cpp as you would do with variables.
• Note that the standard library doesn't use const. E.g. std::vector::at(size_type pos). What's good enough for the standard library is good for me.