On 2009-12-07 01:29:14 -0500, Andrei Alexandrescu <[email protected]> said:

Using double negation !!x throughout, there are only advantages and no disadvantage. I hit that design with Pacquiao punches over the past week or so, and couldn't find any shortcoming. It's consistent across positive and negated uses, easy to understand, easy to define, consistent with built-in types, and Walter likes it.

I'm not sure that's a great idea. What if you define your own FuzzyBool type (containing some sort of probability) and FuzzyBool.opUnary!("!") returns an inverted FuzzyBool (with 1 - original probability) instead of a regular bool, you'd have an infinite loop trying to evaluate !!myBoolValue.

--
Michel Fortin
[email protected]
http://michelf.com/

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