[boost] [Tribool] Comparation tribool value with indeterminate constant

From: Oleksandr Yefremov (oleksandr.yefremov_at_[hidden])
Date: 2006-07-05 12:26:42

Hello,

I have proposal to make small change to the Tribool library.

Now it is possible to write following code

tribool b = indeterminate ;

if (indeterminate (b))
{
  // process indeterminate case
}

if (b == indeterminate)
{
  // this always false and should never be used in real code
}

I propose to change following operators to get compiler errors in above 
code fragment:

    tribool operator==(indeterminate_keyword_t, tribool);
    tribool operator==(tribool, indeterminate_keyword_t);
    tribool operator!=(indeterminate_keyword_t, tribool);
    tribool operator!=(tribool, indeterminate_keyword_t);

change returning value type to void like this.

    void operator==(indeterminate_keyword_t, tribool);
    void operator==(tribool, indeterminate_keyword_t);
    void operator!=(indeterminate_keyword_t, tribool);
    void operator!=(tribool, indeterminate_keyword_t);

-- 
Best regards,
Oleksandr Yefremov