Re: defining operators

On Wed, 2008-04-30 at 11:39 +0200, Pierpaolo Bernardi wrote:
> > The problem is with the operator '?='.
> >
> > In ops.pro, I have just one line:
> >
> > op(700,xfx,?=).
>
> In source files you should write:   :- op(...).
>
> Otherwise you are trying to modify the built-in op procedure.

Thanks, Pierpaolo (and others who supplied this answer offlist).

Brianna

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