On Friday, December 9, 2016 at 10:25:06 AM UTC-8, robby wrote:
>
>
> Sure, cleaning up stuff like that sounds quite welcome. And the parser 
> tools could use a lot of clean up, I believe. They are kind of strange 
> and klunky compared to modern racket. 
>

What expectation of backward compatibility is baked into `parser-tools`? 
How much modernization is acceptable?

IOW, suppose I've added a `lexer-srcloc` variant of `lexer-src-pos` that 
uses srcloc structs rather than the "strange and klunky" structures 
currently used by `parser-tools`. But that creates a dependency on the 
`srcloc` structure in modern Racket, which might annoy the MzScheme v372 
community.
 

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