[plt-scheme] Combining scheme/serialize, structures, and macros?

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Sat Feb 16 22:00:51 EST 2008

The problem is that `identifier-binding' is relative to the module
currently being expanded. But `scheme/serialize' needs an
`identifer-binding' that is relative to the enclosing
`scheme/serialize' module instance.

Along the same lines, the `dynamic-require' in `scheme/serialize'
really should be in the same phase as the `scheme/serialize' instance.

The v4 namespace-anchor support is a step toward solving both of these
problem, but more is needed. I was just waiting for an example to add
that extra support --- and I hadn't noticed that we already have one.


At Sat, 16 Feb 2008 20:16:34 -0500 (EST), Danny Yoo wrote:
> > I ran across a problem in one of my projects.  I've distilled the 
> > problem into a toy example, so hopefully someone can tell me what I'm 
> > doing wrong.
> > :)
> I don't quite understand why, but the attached hack into 
> scheme/serialize.ss makes things "work" for me.
> The issue seems hinged upon the fact that the deserialize-id that's 
> attached to my serializing value has an identifier-transformer-binding 
> rather than an identifier-binding in my constructed scenario... but I 
> don't know why!  There's some confusion on my end about the phases: I 
> don't know the root cause of the problem.
> What I changed is from:
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>      (let ([b (identifier-binding deserialize-id)]) ...)
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> to a looser:
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>      (let ([b (or (identifier-binding deserialize-id)
>                   (identifier-transformer-binding deserialize-id))]) ...
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> I am pretty darn sure this is not the right fix, but maybe it will help 
> someone more expert in figuring out what the ultimate cause of the issue 
> is?  With this hack, my test-compiler.ss's test-1 runs fine.
> ------------------------------------------------------------------------------
> [text/plain "serialize.ss.diff"] [save to ~/Desktop/ & open]
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