[plt-scheme] how to creating a new "primitve type"

Only using guard-proc looks enough to me.

Chongkai

----- Original Message ----- 
From: YC
To: Chongkai Zhu
Cc: mzscheme Mailing List
Sent: Tuesday, May 08, 2007 2:33 PM
Subject: Re: [plt-scheme] how to creating a new "primitve type"


Hi Chongkai -

thanks for the helpful answers.  I am reading up on the links right now and 
try to digest it.

At first I thought struct doesn't have custom constructor for validation 
logic until I saw guard-proc - so that should solve the data validation 
problem.  So now the question is - should the parse/validation logic reside 
in readtable as well? Or is it okay to let readable construct the object, 
but only receive an error from the construction?

Thanks,
yinso