Re: [Chicken-users] problems with datatype and eopl 3-5

[Ulrich Vollert]

This is my experience, too - datatype.egg doesn't work together with 
sllgen.scm and 3-5.scm as stated in EOPL.

I found out that for instance

   (scan&parse "3")

answers

   (a-program (lit-exp 3))

which "looks" right but is not accepted by eval-program as a valid 
program which means that

   (eval-program (scan&parse "3"))

produces an error (bad argument type to 'cases').

But....an additional eval helps...so

   (eval-program (eval (scan&parse "3")))

works....!

Regards,
Ulrich

> From: Zbigniew <address@hidden>
>
> Neither one works.  I think datatype.egg may be incompatible with the EOPL code.
>
> On 4/23/07, felix winkelmann <address@hidden> wrote:
>   
> > To use the "datatype" extension, then use
> > "require-extension" (or "use") to load the macros,
> > "require-for-syntax" is for obscure special uses, and
> > should normally not be used:
> >
> > (require-extension datatype)
> >