Proposal for addition: tristate class - 3-state logical type

[Michael Pyne]

On Friday 09 September 2005 19:17, Olivier Goffart wrote:
> My objections are still the same:  it can be done with a simple int or an
> enum. (where, AFAIK, operators like ! and ~ works also)

Well ! shouldn't work anyways, because it can mean "!= true" or "== false", 
and with a tristate those two choices are not identical.  Similar arguments 
apply to ~.

A simple int is crap, and while an enum would work the ! and ~ operators 
couldn't be expected to have meaning anyways, and you'd also lose the 
operator overloading and bool ctors.

> Can you point me a place in the code where that class will be usefull ?

It would be useful for code that needs to return a code regarding user input 
where either the action was canceled, succeeded, or failed.  I think you can 
imagine that KDE has quite a bit of code that performs user interaction. ;)

To be honest I'm not sold on it needing to be in kdelibs but those specific 
objections are rather groundless IMO.

Regards,
 - Michael Pyne
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