Re: [Fwd: [Schematics-development] SISC emit-annotations]

> EMIT-ANNOTATIONS causes the SISC Scheme *reader* to include source
> file location information.  However the location information is *not*
> propagated by the macro system.  Thus after macro expansion, only
> source that didn't go through macro expansion still has location
> information.

To be a bit more clear, any expression that survives macro 
transformation has source information, for example:

(let ([x (foo 3)]) 
  (bar 4))

Location information won't exist for the let statement itself, but will 
still be attached to the two function calls. 

> But still... might it be possible for SchemeUnit to capture location
> information in SISC?  Could be.  The original syntax object passed to
> a macro transformer has location information; the information is not
> present in pattern variables after pattern matching by SYNTAX-RULES or
> SYNTAX-CASE.  So you might be able to capture location information, if
> you get to it early enough.

That shouldn't be the case.  It is only new code generated by the 
expander and syntax itself which has no location information.



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