What is Invariant Good For?

[Walter Bright]

Derek Parnell wrote:
> Simple words will never suffice, so we may as well use words which are
> approximately right and just learn to associated them with their exact
> meaning. Arguing over 'const' 'immutable', 'invariant', 'constant',
> 'constrained', 'fixed', 'final', 'hard', 'shell-encrusted-soft-core', ...
> is pretty much a waste of precious time. It really does not matter; just
> pick something, define it, and go with it.


Exactly. The rest is arguing about the color of the bicycle shed.