[racket] disappeared-use syntax property

On Wed, May 29, 2013 at 2:43 AM, Eric Dobson <eric.n.dobson at gmail.com> wrote:
> Is it 'wrong' to add a disappeared-use property onto a syntax object
> even if the use wasn't actually disappeared? Its not very obvious what
> semantics these syntax properties are supposed to have.

I would take an operational view of the semantics: use the
'disappeared-use property if you want DrRacket to draw an arrow to the
location of that syntax object.

Sam