Re: [boost] 3-state boolean type

From: Victor A. Wagner, Jr. (vawjr_at_[hidden])
Date: 2002-08-02 12:03:59

At Thursday 2002/08/01 16:49, you wrote:
>We have a rather complex application that quite often needs 3-state logic --
>true, false, or undecided.  Since making decisions sometimes require a huge
>amount of work, we don't want to do it until we need to know, and then we 
>don't
>want to do it again.
>
>That's not the same as fuzzy logic, and it would be a very good use of the
>proposed 3-state data type, in my opinion.  The third state in this usage 
>would
>be better named 'undecided' or 'undetermined', rather than 
>'indeterminate'.  For
>brevity, however, I suggest 'maybe' as the third state.  It's just as 
>likely to
>be applicable as the other possibilities, and its meaning is clear as an
>alternative to 'true' or 'false'.
The 'states' I've used in the past are  true, false, not_yet_decided.
This comes up in some iterative algorithms in the form of exit true / exit 
false / keep going.

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