[racket] disappeared-use syntax property

From: Sam Tobin-Hochstadt (samth at ccs.neu.edu)
Date: Wed May 29 07:48:29 EDT 2013

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.


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