[plt-scheme] Re: expansion continuations and barriers

From: David Van Horn (dvanhorn at cs.brandeis.edu)
Date: Tue Jul 24 16:13:41 EDT 2007

Matthias Felleisen wrote:
> It's an effect.

But so is module-identifier-mapping-put!; I don't see why there can't be 
control effects at expansion time.  Can you elaborate?  Where would my 
code go wrong if the continuation barrier weren't in place?


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