Re: [Groff] Conditional problem: "!" operator after "&"

[Werner LEMBERG]

More than a half year ago you wrote:

>> +Attempting to insert the @samp{!} operator
>> +within the expression results in a
>> address@hidden expression expected} warning.  This
>> +maintains bug-compatibility
>> +with old versions of @code{troff}.
> 
> It is not a bug that it works that way in troff.

I've fixed that now by removing `bug-'.

>> address@hidden
>> +.nr X 1
>> +.nr Y 0
>> +.\" This does not work as expected
>> +.if (\n[X])&(!\n[Y]) .nop X only
>> +.
>> +.\" Use this construct instead
>> +.if (\n[X]=1)&(\n[Y]=0) .nop X only
>> address@hidden
> 
> Perhaps this can have values other than 1 for X and use Tadziu's
> (1-\nX) with an explanation of why.

Can you provide a patch?


    Werner