[racket] TR error message

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Tue Sep 21 22:31:09 EDT 2010

On Sep 21, 2010, at 9:01 PM, Shriram Krishnamurthi wrote:

> If so why are many of the combinations missing? 

Because this is work in progress to support typed-based optimizations. Roughly speaking, with types TR can macro-generate code that exploits Racket's specialized primitives to an extent that eliminates a large amount of overhead -- for certain numeric programs. 

Problem is that it may require the programmer to work a bit harder to find the right entry point into the numeric hierarchy. I experienced this recently, too. 

So hang in there and enjoy TR for what it is, research in progress -- Matthias

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