repeated unary operators

[klakplok]

I read somewhere on the internet that ~expr was the same as ~~~~expr, which is not, it is a repeated application of the ~ operator, and it happens that applying a boolean negation an odd (and > 1) number of times is useless since it can be rewritten as a single one. Applying ~ twice is ok, it is a cast to bool (~~3 is T), but applying it four or more times is also useless.

Scilint should warn about a number of nested applications of ~ strictly superior to 2.
Scilint should also probably warn about a number of applications of - strictly superior to 1.