Re: [Groff] how to use logical operators

[Richard Ray]

On Tue, 6 Apr 2010, Werner LEMBERG wrote:

> > I know this is wrong
> > Would someone fix it
> >
> > .ds a foo
> > .ds b bar
> > .
> > .if d a & d b \{\
> > \*[a] \*[b]
> > .\}
> >
> > Richard
>
> Solution:
>
> .ds a foo
> .ds b bar
> .
> .if d a \
> .  if d b \{\
> \*[a] \*[b]
> .\}
>
> > From groff.info, section `Operators in Conditionals':
>
>  Note that these operators [like `d'] can't be combined with other
>  operators like `:' or `&'; only a leading `!' (without whitespace
>  between the exclamation mark and the operator) can be used to negate
>  the result.
>
>
>     Werner

bummer